Different Degrees Of Damage Research Articles

Effect of Interface Damage on Band Structures in a Periodic Multilayer Plate

The interface/interphase is modeled by distributed springs, and the degree of interface damage is characterized by the flexibility coefficient of the springs. Considering different degrees of damage at different interfaces, a general dispersion equation by the transfer matrix method was obtained. For the purpose of application, the transmission coefficient of finite-period phononic crystals is also derived. Additionally, the band structures and the transmission coefficients are calculated for different degrees of damage to confirm the interface effect on band gaps. A numerical simulation of the transmission coefficient is performed using the commercial FEM software Comsol Multiphysics. The numerical results obtained agree well with the analytical solution. Finally, based on a monotonic decreasing relationship between the degree of interface damage and the central frequency of band gaps and a monotonic relationship between the degree of interface damage and the amplitude of transmission coefficients, a new method how to evaluate the degree of interface damage theoretically is proposed.

Characterization of multiple sclerosis lesions with distinct clinical correlates through quantitative diffusion MRI

Diffusion magnetic resonance imaging can reveal quantitative information about the tissue changes in multiple sclerosis. The recently developed multi-compartment spherical mean technique can map different microscopic properties based only on local diffusion signals, and it may provide specific information on the underlying microstructural modifications that arise in multiple sclerosis. Given that the lesions in multiple sclerosis may reflect different degrees of damage, we hypothesized that quantitative diffusion maps may help characterize the severity of lesions “in vivo” and correlate these to an individual’s clinical profile. We evaluated this in a cohort of 59 multiple sclerosis patients (62% female, mean age 44.7 years), for whom demographic and disease information was obtained, and who underwent a comprehensive physical and cognitive evaluation. The magnetic resonance imaging protocol included conventional sequences to define focal lesions, and multi-shell diffusion imaging was used with b-values of 1000, 2000 and 3000 s/mm2 in 180 encoding directions. Quantitative diffusion properties on a macro- and micro-scale were used to discriminate distinct types of lesions through a k-means clustering algorithm, and the number and volume of those lesion types were correlated with parameters of the disease. The combination of diffusion tensor imaging metrics (fractional anisotropy and radial diffusivity) and multi-compartment spherical mean technique values (microscopic fractional anisotropy and intra-neurite volume fraction) differentiated two type of lesions, with a prediction strength of 0.931. The B-type lesions had larger diffusion changes compared to the A-type lesions, irrespective of their location (P < 0.001). The number of A and B type lesions was similar, although in juxtacortical areas B-type lesions predominated (60%, P < 0.001). Also, the percentage of B-type lesion volume was higher (64%, P < 0.001), indicating that these lesions were larger. The number and volume of B-type lesions was related to the severity of disease evolution, clinical disability and cognitive decline (P = 0.004, Bonferroni correction). Specifically, more and larger B-type lesions were correlated with a worse Multiple Sclerosis Severity Score, cerebellar function and cognitive performance. Thus, by combining several microscopic and macroscopic diffusion properties, the severity of damage within focal lesions can be characterized, further contributing to our understanding of the mechanisms that drive disease evolution. Accordingly, the classification of lesion types has the potential to permit more specific and better-targeted treatment of patients with multiple sclerosis.

Experimental Research on the Mechanical Characteristics and the Failure Mechanism of Coal‐Rock Composite under Uniaxial Load

Due to the influence of the component structure and combination modes, the mechanical characteristics and failure modes of the coal‐rock composite show different characteristics from the monomer. In order to explore the effect of different coal‐rock ratios on the deformation and the failure law of the combined sample, the RMT rock mechanics test system and acoustic emission real‐time monitoring system are adopted to carry out uniaxial compression tests on coal, sandstone, and three kinds of combined samples. The evolution rules of the mechanical parameters of the combined samples, such as the uniaxial compressive strength, elastic modulus, and Poisson’s ratio, are obtained. The expansion and failure deformation characteristics of the combined sample are analyzed. Furthermore, the evolution laws of the fractal and acoustic emission signals are combined to reveal the crack propagation and failure mechanism of the combined samples. The results show that the compressive strength and elastic modulus of the combined sample increase with the decrease of the coal‐rock ratios, and Poisson’s ratio decreases with the decrease of the coal‐rock ratios. The strain softening weakens at the postpeak stage, which shows an apparent brittle failure. The combined sample of coal and sandstone has different degrees of damages under load. The coal is first damaged with a high degree of breakage, with obvious tensile failure. The acoustic emission energy value presents different stage characteristics with increasing load. Crackling sound occurs in the destroy section before the sample reaches the peak, along with small coal block ejection and the partial destruction. The energy value fluctuates violently, with the appearance of several peaks. At the postpeak stage, the coal samples expand rapidly with a loud crackling sound in the destroy section, and the energy value increases dramatically. The crack propagation induces the damage in the sandstone; when the energy reaches the limit value, the instantaneous release of elastic energy leads to the overall structural instability.

Assessment of RC elements strengthened with NSM FRP rods by experimental tests

Near surface mounted (NSM) technique of strengthening with FRP rods inserted in grooves on the concrete cover of damaged RC beams has been improved in recent years. The aim of this paper is the examination of the static and dynamic behaviour of undamaged and damaged reinforced concrete (RC) beams with free-free ends. RC beams strengthened with NSM Glass and Carbon fiber reinforced polymer (G-CFRP) rods have been experimentally analysed. The damage of the RC beam model was obtained by the cracking of concrete under bending tests. The detection of damage and monitoring of RC beams with and without strengthening were carried out by vibration tests assuming free-free ends at different degree of damage. Envelope diagrams of Frequency Response Functions (FRFs) obtained by the dynamic experimental tests are shown and the changes of natural frequency values are correlated to the damage degree of beam elements. Experimental results are discussed with particular emphasis on the aspect of the loss of bond.

Safety parameters of in vivo low-energy shock waves and their impact on adult rat testes.

Low-energy shock waves (LESWs) have been widely used in the intervention of a subset of diseased tissues and organs with good results. However, it is unclear whether they can be used directly to intervene in the testes. Therefore, the aim of this study was to determine a relatively safe energy density and impulse number for rat testes. A total of 176 male rats were randomly and equally assigned to different intervention groups. Among them, 144 rats were assigned to 18 shock subgroups with different energy densities (0.02, 0.04 and 0.06mJ/mm2), different impulse numbers (500, 1000 and 1500 impulses) and different shock periods (2 and 8 weeks). The remaining 32 rats were divided into the sham intervention (S) groups and the blank control (N) groups with observation periods of 2 weeks and 8 weeks. One day after the last LESWs intervention, all the rats were weighed, and the concentrations of reproductive endocrine hormones were measured, the semen quality and testicular tissue oxidative stress levels were analyzed, and histomorphology and ultrastructures were observed. We found that there were no significant differences in the whole-body physiological state, testicular tissue morphology, oxidative stress state and sperm quality between the L1 shock group and the corresponding S group and N group (all p˃0.05, respectively). However, the other parameters of the shock groups caused different degrees of damage to the structure and function of rat testes, and the whole-body physiological state was also adversely affected. This study demonstrated that LESWs with an energy density of 0.02mJ/mm2 and 500 impulses had no adverse effects on the rat testes.

Diagnostic module for series-connected photovoltaic panels

An online diagnostic module for condition monitoring of two series-connected photovoltaic panels is presented. The technique is based on firstly perturbing the terminal voltages and currents of the panels with a switched-inductor circuit, which can also be used for differential power processing, to obtain the large-signal dynamic current-voltage characteristics of the panels. An evolutionary algorithm is used to estimate the intrinsic parameters of the panels from the time series of the sampled panel current and voltage. The conditions of the panels are monitored by observing the long-term changes in the extracted intrinsic parameters. Prototype data acquisition module for studying the conditions of solar panels of different technologies (amorphous and crystalline silicon) with different degrees of damage has been built and evaluated. Results reveal that the estimated intrinsic parameters from large-signal dynamic characteristic correlate with the observed health status of the tested panels. Theoretical predictions are favorably compared with experimental measurements.

Experimental Free Vibration of Damaged RC Beam Models

Reinforced Concrete (RC) Beam undamaged and damaged were investigated by free vibration to obtain a variation of frequency values at different degree of damage. Experimental tests were carried out on RC beams in scale and in real scale. The damage of RC beams in real scale was obtained by cracking under static bending tests, while in the case of beam in scale is obtained by notches on the concrete cover with different width. In general, the effects on the dynamic response of diffused damages and of concentrated damages on a section of beam have been experimentally analyzed. The envelope of frequency response functions (FRFs) obtained by dynamic experimental tests was elaborated and the changes of natural frequency values were then correlated to the damage degree of RC beams. The experimental data have been discussed and analyzed by comparison with theoretical results.

Oligogenesis in the "oligovascular unit" involves PI3K/AKT/mTOR signaling in hypoxic-ischemic neonatal mice

The "oligovascular unit" is a dynamic structural complex composed of endothelial cells (ECs) and oligodendrocyte progenitor cells (OPCs)/oligodendrocytes. By improving the microenvironment of OPCs in the "oligovascular unit" and promoting the proliferation and differentiation of OPCs, both myelination and white matter injury can be repaired. However, it is unclear what characteristic changes occur in the microenvironment of the "oligovascular unit" after preterm white matter injury (PWMI). Here, we demonstrate the changes in the "oligovascular unit" induced by hypoxia-ischemia (HI) and its underlying mechanism in PWMI mice. White matter injury and inhibited production of myelin from OPCs were observed by histopathological staining in HI neonatal mice. We further observed that the proliferation of OPCs and angiogenesis were increased after HI, which is considered the response of the body and cells to HI. HI-induced oligogenesis occurs around the vessels, indicating that "oligovascular units" exist and promote the proliferation and differentiation of OPCs after HI in the short term. We also determined that angiogenesis and oligogenesis induced by HI in the white matter are related to the PI3K/AKT/mTOR pathway. Furthermore, the myelin sheaths were shown to be disordered on the side of the surgery, and the myelin-dense layer was poorly developed at P14 and P28. Different degrees of damage to the vascular ECs and basement membrane on the surgical side were detected beginning at P4, indicating that EC injury is an early phenomenon that subsequently affects oligogenesis. Taken together, our findings indicate that the proliferation of OPCs and angiogenesis in white matter are increased in the early stage of HI involving PI3K/AKT/mTOR pathway activation. Promoting vascular endothelial function and angiogenesis may increase the proliferation and survival of OPCs via the "oligovascular unit," which suggests a potential method to repair injured white matter in the early stage of PWMI.

Study on the Situation and Countermeasures of the Anti-typhoon Technology of Wharf Mooring of Large Unpowered Ship

With the development of the shipping industry, it is becoming more and more important to improve the maritime transportation capacity from various aspects. Among them, unpowered ships dock mooring safety is particularly important, once the ship out of control, not only the ship will suffer serious damage, surrounding unpowered ships, sailing ships, personnel, port terminals, and some hardware facilities could be different degrees of damage and destruction. This paper hope through the research on large unpowered ships dock mooring, put forward the corresponding countermeasure, to provide reference to the relevant units.

A Analysis of Attack and Defense Mobile Ad Hoc Network Based on OPNET

Due to the broadcast nature of wireless communications, the damage to mobile ad hoc networks is becoming more and more common. We propose a network stability model that can effectively reflect the network performance when the network is damaged in real time. The Ad Hoc network model is built by using the node model supporting the IEEE802.11 standard provided by OPNET software to simulate the network performance of the network under different degrees of damage. This model provides an effective way for the simulation analysis of network performance under the condition of Ad Hoc network damage.

Influence of cyclic wetting‐drying on the mechanical strength characteristics of coal samples: A laboratory‐scale study

AbstractWater‐coal interactions have gained much recent attention, although few studies focus on the strength of coal under wetting‐drying cycles. This study investigates changes in the microstructure and mechanical strength of coal that are induced by water‐coal interactions, at the macroscale and microscale. Fourteen specimens after continuous wetting and fourteen specimens after wetting‐drying cycles were tested, indicating that peak stress and elastic modulus decrease with increasing continuous wetting time and number of wetting‐drying cycles, while peak strain increases. We analyzed changes in the coal microstructure using a scanning electron microscope (SEM) and the Image Pro Plus 6.0 (IPP 6.0) software. The regression model for cyclic wetting‐drying reveals that porosity and pore circularity are the main correlation indicators associated with uniaxial compressive strength. Therefore, different numbers of wetting‐drying cycles could induce different degrees of damage to coal, which increases progressively through gradual changes to its microstructure. These findings indicate that wetting‐drying cycles have a more significant impact on the stability of coal mass than continuous wetting. Our results are of use in determining the size of coal pillars, and expanding the knowledge base related to the mechanical properties of coal mass, water bursting, water recharge channels, and the stress‐crack‐permeability evolution law in mines.

Simulation for Frost Heaving Damage of Concrete Lining Channels by Using XFEM

Li, J.; He, X., and Zhou, B., 2019. Simulation for frost heaving damage of concrete lining channels by using XFEM. In: Guido-Aldana, P.A. and Mulahasan, S. (eds.), Advances in Water Resources and Exploration. Journal of Coastal Research, Special Issue No. 93, pp. 264–273. Coconut Creek (Florida), ISSN 0749-0208.Concrete lining plays an important role in channel protection. The existence of seasonal frozen soil has caused different degrees of damage to concrete lining channels. When the concrete lining plate cannot bear the channel base soil frost heaving force or cannot adapt to the channel base soil frost heave deformation, frost heaving damage, such as crack and even rupture, will be produced. In this study, the numerical simulation model of frost heaving damage of concrete lining channels is established. The temperature field is accurately simulated through an equivalent equation of heat conduction. The extended finite element method combined with the thermal coupling method is used in this study to analyze the frost heaving damage of the lining channel. The crack is predicted to propagate under the action of frost heave so that the destruction of the concrete lining channel. The development of the crack and the failure mode of the channel are simulated. It is found that the damage location and degree of lining slabs at different locations of the same section are different. And the crack form is I + II compound crack. The mechanism of frost heave damage of concrete lining canal was revealed, which provides a reference for prevention and control of frost heave of lining canal.

High dosages of pectin and cellulose cause different degrees of damage to the livers and intestines of Pelteobagrus fulvidraco

Non-starch polysaccharides (NSPs) are important anti-nutritional factors in plant by-product sources, and the adverse impact of high doses of NSPs on fish physiology has not received sufficient attention. A feeding trial was conducted to investigate the physiological effects of high dietary pectin and cellulose, two NSPs with different water solubilities, on the yellow catfish, Pelteobagrus fulvidraco. A diet with 300 g kg−1 dextrin was used as the control (CON diet). In test diets, dextrin was replaced with 300 g kg−1 pectin (PEC diet), cellulose (CEL diet), or a mixture of pectin and cellulose (1:1, MPC diet). Each diet was randomly assigned to triplicate groups of juvenile yellow catfish (5.80 ± 0.20 g). Fish were fed twice daily to apparent satiation for 8 weeks. The growth performance, apparent digestibility coefficients, hepatosomatic index, serum concentration of triglycerides, total cholesterol, total protein, albumin, seroglobulin and the activities of alkaline phosphatase and cholinesterase were significantly decreased in fish fed the PEC diet compared with those in fish fed the CON diet (P < .05). The liver showed obvious adipose degeneration and fibrosis, and the fold height and width of the hindgut significantly decreased (P < .05). Fish fed the MPC diet had a similar but weak response, and fish fed the CEL diet had the weakest response. However, the concentration of total bile acid in the serum of fish fed the MPC diet was 74.5 times higher than that of fish fed the CON diet, while total bile acid in the serum of fish fed the PEC and CEL diets was 4.9 and 1.2 times higher, respectively, than in fish fed the CON diet. The green liver symptom occurred in 11.67% and 10.0% of fish fed the CEL and MPC diets, respectively, while the liver was pale in fish fed the PEC diet. These results indicated that high doses of pectin and cellulose caused different degrees of damage and dysfunction to the livers and intestines of yellow catfish.

Experimental Research on the Stability behavior of Composite Curved Stiffened Fuselage Panel under Four-Point-Bending load

In the design of fuselage structure, not only the longitudinal stability should be considered, but also the circumferential stability of fuselage structure is important because of its circumferential bearing of bending moment, shear force and axial force, as well as considering crash conditions. In this paper, the circumferential stability test researches of the fuselage structure were performed on the single-frame curved panel test specimens. The buckling and post-buckling characteristics of the single-frame curved panel under the negative bending condition were examined by four-point bending loading method. At the same time, the buckling mode, failure process and damage mechanism of single-frame curved panel were analysed through the load-strain curves of the skin and the different degree of damage of the three test specimens. The experimental results show that the buckling of skin is an important factor causing the debonding between the cap-stringers and the skin. The expansion of the debonding area greatly reduces the bearing capacity of the curved stiffened panel structure, which eventually leads to the breakage of the frame.

A physically-based damage model for soft elastomeric materials with anisotropic Mullins effect

In this paper, we develop a new physically-based damage model to describe the anisotropic Mullins effect of elastomeric materials. The damage model is based on our previous hyperelastic model (Xiang et al., 2018), which has a strain energy density function composed of the crosslinked part and the entangled part. We describe the damage of the crosslinked network using a network alteration theory. Chains along various directions suffer from different degrees of damage and thus cause the anisotropy. The irreversible degradation on constraints for entanglement leads to the reduction of the entangled modulus with the increasing of historical maximal stretch. This model can well capture the stress-softening, anisotropy and residual deformation (permanent set) with only five parameters that have definite physical meanings. It also predicts the damage behaviors under various states of deformation, for both unfilled and filled elastomers. We use the model to fit the experiment data of VHB 4905, silicon rubber, carbon-black filled styrene butadiene rubber (SBR) and carbon-black filled nature rubber (NR). The damage induced anisotropy, which is validated by directional loading experiments of silicon rubber and carbon-black filled NR, can be characterized. We compare this model with other existing similar ones, and show its competitive advantages in characterizing the comprehensive Mullins effect with concise and explicit mathematical expression and physical meaning.

Immunomodulatory influences of sialylated lactuloses in mice

The aim of this study was to investigate the immune modulatory influences of sialylated lactuloses in mice. The effects of the four sialylated lactuloses by gavage methods on the weight gain rate, organ, serum and spleen immunoglobulin of mice were investigated. Neu5Ac-α2,3-lactulose group and Kdn-α2,3-lactulose group had significantly higher weight gain rate than control group. The weight gain rate, thymus index and spleen index of Kdn-α2,3-lactulose group were significantly higher than control group and lactulose group. Liver and small intestine of Neu5Ac-α2,3-lactulose group, Neu5Ac-α2,6-lactulose group and Kdn-α2,6-lactulose group showed different degree of damage. IgG levels of serum and spleen in Neu5Ac-α2,6-lactulose group and Kdn-α2,6-lactulose group were significantly higher than control group and lactulose group. The contents of IgG in serum and spleen of Kdn-α2,3-lactulose group were significantly lower than that of control group, while the contents of IgA and IgM in serum were significantly higher than those of control group. The IgA level increased by 12.23% and 58.77% comparing with lactulose group and control group, respectively. The IgM level in serum of Kdn-α2,3-lactulose group mice increased by 43.88% and 8.05% comparing with control group and lactulose group, respectively. The IgA level and IgM level in spleen of Kdn-α2,3-lactulose group mice increased by 49.05% and 47.25% comparing with control group. In short, Kdn-α2,3-lactulose is relatively safe and superior to use as a food supplement or potential drug candidate. Our results also indicate that some other sialylated oligosaccharides are potentially harmful to organisms, they may cause some side effects.

METHODOLOGY OF JUSTIFICATION THE TYPE AND EVALUATION OF QUALITY GROUP SEARCH OF DEFECTS IN THE REPAIR RADIO-ELECTRONIC MEANS

Context. Radioelectronic devices are continuously complicated, which complicates the process of restoring their efficiency, when the diagnosis consumes the largest labor costs and time. Therefore, the promising direction of increasing the efficiency of the renewal of modern electronic means is to improve diagnostic support. Objective. The purpose of the article is to increase the efficiency of diagnostic provision of radio electronic means at the expense of a reasonable choice of the type of group search of defects. Method. In the work analytical studies of conditional algorithms of diagnosis with the use of graph theory theory, probability theory and the theory of discrete search – a scientific discipline that studies the diagnostic process when restoring the efficiency of complex technical objects with varying degrees of damage through research and optimization of procedures and algorithms for detection of a priori – in unknown number of elements with given properties on the finite structurally-bounded set according to some criterion. Results. The method of choosing the type of algorithm of group search of defects at given restrictions and assumptions on the criterion of minimum labor costs on the basis of generalization of the graph-analytical model of group search of defects with quantitative estimation of probabilistic, time and cost indicators of the quality of the process of diagnosing radioelectronic devices with different degree of damage, which allows to pre-substantiate the most appropriate algorithm for group defects search for use in the development of diagnostic support for modern radio ectronic means. Conclusions. For the first time, various types of group search of defects with a quantitative estimation of the efficiency of their use depending on the features of radio-electronic means and the conditions for their restoration of efficiency are considered in a complex way.

Physiological Responses and Tolerance Evaluation of Five Poplar Varieties to Waterlogging

Waterlogging resistance of five poplar varieties, ‘Danhongyang’ (DHY), ‘Juba-261’ (JB-261), ‘Zongqiansanhao’ (ZQ-3), ‘Zhonglin-2025’ (ZL-2025), and ‘Nanlin-895’ (NL-895), was evaluated under the simulated waterlogging conditions. Data on changes in leaf color and morphology as well as in biochemical indices, such as chlorophyll, malonaldehyde, soluble protein, soluble sugar content, superoxide dismutase (SOD), peroxidases (POD), ascorbate peroxidase (APX), glutathione reductase (GR), and glutathione peroxidase (GSH-PX) activities, relevant to submergence stress, were analyzed. The principal component analysis of the data identified the waterlogging resistance coefficient of the indices, which showed that waterflooding brought about different degrees of damage in the five poplar varieties, with DHY having the lowest waterlogging index. The leaf pigment content of the poplar was remarkably decreased by waterlogging, whereas malondialdehyde (MDA) and proline contents were enhanced, but in different extents among the poplar varieties. Nearly all other poplar varieties showed a tendency of decline in JB-261, ZQ-3, ZL-2025, NL-895, except for SOD activity in DHY, which increased under submergence stress. Poplar varieties had varying degree of changes in POD activity, and APX activity tended to increase upon waterlogging. GR also displayed increasing tendency in JB-261, ZL-2025 and NL-895, except for in ZQ-3, which declined under waterlogging stress. GSH-PX except for ZQ-3 displayed no significant change, which showed a tendency of decline in DHY, JB-261, ZL-2025, and NL895. Principal component analysis allowed us to reduce16 indices to four independent indices. The subordinate function analysis identified that the DHY variety had the highest waterlogging tolerance, whereas the NL-895 variety had the lowest waterlogging tolerance among tested varieties.&#x0D; &#x0D; *********&#x0D; In press - Online First. Article has been peer reviewed, accepted for publication and published online without pagination. It will receive pagination when the issue will be ready for publishing as a complete number (Volume 47, Issue 3, 2019). The article is searchable and citable by Digital Object Identifier (DOI). DOI link will become active after the article will be included in the complete issue.&#x0D; *********

Dynamic hydrolase labelling as a marker for seed quality in Arabidopsis seeds.

Seed quality is affected by different constituents of the seed. In general, seed lots are considered to be of high quality when they exhibit fast and homogeneous germination. When seeds are stored, they undergo different degrees of damage that have detrimental effects on their quality. Therefore, accurate prediction of the seed quality and viability levels of a seed lot is of high importance in the seed-producing industry. Here, we describe the use of activity-based protein profiling of proteases to evaluate the quality of artificially and naturally aged seeds of Arabidopsis thaliana Using this approach, we have identified two protease activities with opposite behaviours in aged seeds of Arabidopsis that correlate with the quality status of the seeds. We show that vacuolar processing enzymes (VPEs) become more active during the ageing process, in both artificial and natural ageing treatments. Secondly, we demonstrate that serine hydrolases are active at the beginning of our artificial ageing treatment, but their labelling decreases along with seed viability. We present a list of candidate hydrolases active during seed germination and propose that these protease activities can be used in combination with VPEs to develop novel markers of seed quality.

Application of Hall effect for assessing grinding thermal damage

The limitations of the usual techniques applied for gear grinding burn detection are extended by the increasing demands on quality control within industrial feasibility. Although widely used, nital etching technique has a subjective character. Alternative techniques such as magnetic Barkhausen noise and X-ray diffractometry also present drawbacks such as variability of output based on external energy input that depends on parameter settings, high cost and destruction of tests parts. Due to this technical gap, an alternative method is suggested, where the remanent induction of a workpiece is measured by means of a Hall probe. The objective of this concept is to reduce external inputs on the workpiece, measuring its natural signal and correlating it to the material property induced by the damage. In this study, three different degrees of damage were investigated with the Hall method, covering damages with phase transformation as well as with modifications on the residual stress state. According to the results obtained, an alteration in the remanent induction which is directly correlated to the burn degree, was detected. The micro-magnetic theory establishes a correlation between the remanent magnetic induction and material hardness as well as residual stress state. The signal alteration detected by the Hall method is in accordance with the micro-magnetic theory for all three degrees of burn analyzed.