Horizontal And Vertical Research Articles

Calculation of CT ideal screw path and safety angle before percutaneous sacroiliac screw placement

IntroductionPercutaneous sacroiliac screw placement is the main surgical approach to treat unstable posterior pelvic ring injuries. Intraoperative fluoroscopic imaging is an important part of safe sacroiliac screw placement. However, how to determine the right perspective view is challenging. We developed a trigonometric algorithm to verify how preoperative pelvic computed tomography (CT) can be used to predict ideal screw path and safety angle.Materials and methodsThe normal pelvic CT data of 30 volunteers from our hospital between September 2021 and June 2023 were collected, and analyzed and reconstructed using Materialise Mimics 21.0. The angle between the cross-sectional ideal screw path and the horizontal plane (∠α), the angles of the pelvic inlet and outlet on the sagittal plane (∠1, ∠2), and the insertion angles of virtual screws at the inlet and outlet (∠a, ∠b) were measured. The ideal insertion angles (∠A, ∠B) and safety angles of the screws at the pelvic inlet and outlet were calculated using trigonometric functions.ResultsThe virtual screw insertion angle ∠a of 30 pelvises measured at the inlet was 18.57 ± 4.33°, and the ideal screw angle ∠A calculated using trigonometric functions was 18.72 ± 4.71° (range, 13.84 ± 0.75°-23.36 ± 0.98°). The difference between the measurement and calculation was only 0.15 ± 0.19° and not significant. The angle ∠b of the virtual screw insertion measured at the outlet was 25.37 ± 5.13°, and the ideal screw angle ∠B calculated using trigonometric functions was 25.58 ± 4.93 ° (range, 19.02 ± 0.88°-31.31 ± 1.01°). The difference between the measurement and calculation was only 0.20 ± 0.13° and not significant. The distance e from the optimal screw insertion point to the vertical line through the anterior superior iliac spine is 32.34 ± 1.76 mm, and the distance f to the horizontal line through the posterior superior iliac spine is 28.61 ± 0.81 mm.ConclusionsDuring preoperative planning, trigonometric calculations were used to determine the ideal screw placement angles and safety angle at the inlet and outlet of the screw path. Combined with intraoperative C-arm fluoroscopy, individualized screw insertion can help orthopedic surgeons quickly and accurately obtain intraoperative images and accurately determine the direction of screw insertion.

Optimizing microstructure and minimizing defects in laser-arc hybrid additive manufacturing of Al-Cu alloy: the role of laser mode

Recently, laser-arc hybrid additive manufacturing (LAHAM) has emerged as a transformative method for producing lightweight aluminum alloys, valued for its advantageous surface quality and mechanical properties. In this study, the effect of various laser modes on macro morphology, defect formation, microstructure evolution, and mechanical properties of Al-Cu alloy were investigated. At a laser power threshold of 1.5 kW, the transition from conduction mode to keyhole mode was observed. When the keyhole formed, the molten metal exhibited enhanced fluidity, resulting in smoother surfaces and more uniform spreading. As laser power increased, although hydrogen-induced pores (HIP) were notably reduced, the keyhole-induced pores (KIP) began to appear. During subsequent depositions, the intense reheating effects from laser facilitated a transformation from reticular eutectics (RE) along grain boundaries to granular eutectics (GE). Additionally, recrystallization and formation of Σ3 coincidence site lattice (CSL) boundaries were restricted due to the reduced residual stress caused by moderating cooling rates, alleviating stress concentration near pores during deformation. Therefore, optimal results were achieved in conduction mode at a laser power of 1 kW, achieving highest tensile strengths of 269.5 MPa and 260.1 MPa, and elongations of 19.6% and 13.8% in horizontal and vertical directions, respectively.

Revealing the contribution of flame spread to vertical thermal runaway propagation for energy storage systems

The rapidly growing energy storage systems necessitate more high-capacity lithium iron phosphate batteries but pose significant safety concerns. In multi-layer battery clusters, if thermal runaway propagation occurs between modules, particularly in the vertical direction, the ensuing fire spread can further result in the accelerated propagation of battery and even an irrevocable catastrophe. Clarifying the contribution of flame spread to vertical thermal runaway propagation is the goal of this investigation. The unexpected propagation characteristics between the upper and lower modules are explored. Further, the critical heat and the percentage of heat that leads to thermal runaway in the upper battery are determined using the equivalent replacement battery. The flame heat transfer is finally decoupled using the thermal radiation model. And the mechanism of vertical thermal runaway propagation induced flame between modules is analyzed. The findings reveal that the higher module's thermal runaway and venting sequence differs from the lower module's, suggesting that flame spread dominated the thermal runaway propagation paths. The critical triggering energy of the upper battery is 1193.6 kJ, comprising 279 kJ of conductive heat, 750 kJ of flame heat, and 164.6 kJ of self-generation heat, with the flame heat accounting for approximately 1.18 % of the total heat released from the battery fire. In contrast to horizontal thermal runaway propagation, where thermal conduction is predominant, the convection heat from battery fire serves as the main heat source for vertical propagation. The findings serve as a foundation for both emergency response to fire incidents and the safe design of battery modules in existing energy storage systems.

A dynamic analysis model for high-altitude steep slope jointless turnouts under the coupling effect of extreme temperature and actual vehicle load

This paper focuses on the difficulty in characterising the complex mechanical behaviour and deformation characteristics of jointless turnouts at high altitudes. Considering its unique characteristics of large altitude differences, large temperature variations, frequent traction actions, vast uninhabited regions, and high failures risks, a rigid-flexible coupling dynamics model of the vehicle-jointless turnout on steep slope under the combined effects of extreme temperatures and actual vehicle loads is established. The model considers the flexible deformations of the turnout along the longitudinal, lateral, and vertical directions, enabling precise representation of temperature loads and the elastic-plastic characteristics of the longitudinal resistance of fasteners within the multi-body dynamics. The research indicates that the coupling effect of extreme temperature and vehicle impact loads can cause the longitudinal resistance of fasteners to exhibit oscillatory effects during the plastic stage, leading to a significant increase in the peak values of longitudinal creep force, shear stress, and wear index of wheel rail, exacerbating rail damage and deterioration. Extreme temperature increases can induce an advancement in the wheel load transition position, with a forward shift value reaching 0.49 m when the temperature increases by 45°C, thereby intensifying wheel-rail impacts.

Ultra-narrow size slotted sleeve multi-band antenna for mining wireless repeaters

ABSTRACT The integration of multi-standard and multi-band wireless communication system will be the development trend of mine communication. The mine wireless repeater is an important part of the mine communication system. However, the antenna suitable for wireless repeaters is a vertical whip antenna, which greatly limits the size of the antenna in the horizontal direction. In this paper, an ultra-narrow size slotted sleeve antenna is proposed for the RF front end of wireless repeaters for underground mining. The antenna design process can be divided into three steps. First, a flag shaped slot is cut in the rectangular sleeve to increase the impedance bandwidth of the antenna. Second, the reverse branch is loaded on the top of the sleeve, which ingeniously increases the resonant path of the antenna. Moreover, a T-shaped slot is etched on the transmission line, which further improves the overall performance of the antenna. The electrical size of the antenna with this unique structural design is only 0.41λ × 0.048λ, which is much smaller than the lateral size of similar antennas. The simulation and measurement results of the proposed antenna are in good agreement, and the working bands include 0.79–0.82 GHz, 1.42–1.47 GHz, 2.39–2.59 GHz, 2.63–2.91 GHz, and 5.10–5.75 GHz.

Efficient Methanol Oxidation Kinetics Enabled by an Ordered Heterocatalyst with Dual Electric Fields.

Induced by a sharp-tip-enhanced electric field, periodical nanoassemblies can regulate the reactant flux on the electrode surface, efficiently optimizing the mass transfer kinetics in electrocatalysis. However, when the nanoscale building blocks in homoassemblies are arranged densely, it results in the overlap and reduction of the local electric field. Herein, we present a comprehensive kinetic heteromodel that simultaneously couples the sharp-tip-enhanced electric field and charge transfer electric field between different building blocks with any arrangement densities. The dual electric fields drive the diffusion of reactants from the bulk solution to the electrode surface, significantly enhancing mass transfer kinetics along the horizontal and longitudinal directions, which promotes the electrocatalytic activity significantly. Moreover, the wide generality of the model is further confirmed by electrochemical experiments involving various electrocatalytic systems and catalysts. Therefore, this work highlights the significant role of dual electric fields in electrocatalysis, which is expected to facilitate the development of customized and outstanding catalysts in the future.

Evaluation of single-dose umbilical cord blood-derived mononuclear cell injection immediately and 7 days after spinal cord trauma in mice.

Experimental study utilizing a standardized Balb C mouse model. Evaluate histological changes and motor function recovery in the acute and subacute phases of Spinal Cord Injury (SCI) in mice using human Umbilical cord blood-derived mononuclear cells. Forty mice were divided into five groups, with two receiving human Umbilical cord blood-derived mononuclear cells immediately after SCI and after 7 days, and three control groups. Motor assessment utilized BMS, MFS, and horizontal plane scales over six weeks. Necropsy evaluated macroscopic and histological spinal cord changes. Histologically, Umbilical cord blood-derived mononuclear cells-treated groups exhibited significant reductions in necrosis, hemorrhage, and degeneration compared to controls. Motor recovery showed partial improvement across all groups, with no statistically significant differences in scales between intervention and control groups. In the acute phases of SCI, Umbilical cord blood-derived mononuclear cells applied directly to Balb C mice lesions demonstrated histological improvement but played a limited role in functional enhancement. The study highlights distinctions in the treatment's efficacy, potentially related to these cells' diverse differentiation capacities and intrinsic properties.

Influence of bio-filter configurations on hydraulic aspects while enhancing the sustainable self-purification of agricultural drainage water

As global climate change exacerbates water scarcity, recycling agricultural drainage water is emerging as a promising solution in water resources-limited regions. This research investigated the hydraulic impact of using gravel bio-filters in contaminated water-courses, focusing on submerged bioreactors as a sustainable engineering solution. This study assessed the hydraulic impacts of installing these bioreactors in polluted waterways using three-dimensional numerical models based on computational fluid dynamics. Results indicated that relative heading-up will increase with the Froude number, demonstrating a direct relationship between flow velocity and heading-up. Altering the shape of bio-filter inlet is predicted to significantly influence heading-up values, with triangular shapes showing the lowest heading-up values compared to basic, rounded, or sloped upstream U.S face shapes. Relative heading-up values will increase by 10.32%, 10.44%, 24.67%, and 31.86% when changing the bio-filter inlet shape from triangular to sloped U.S. face with respect to horizontal and vertical direction, rounded, and basic bio-filter, respectively. Additionally, the number and orientation of shapes in the bio-filter inlet impact relative heading-up, with varying effects predicted based on the inclination angle. These findings provide valuable guidance for mitigating hydraulic impacts and optimizing the design and operation of bioreactors in water resource management, promoting sustainable water purification approaches in contaminated watercourses and conserving surrounding environments.

Study of the mechanical compression properties of Rosa sterilis S.D. Shi based on FEM

Understanding the mechanical properties of Rosa sterilis S.D. Shi is important for the design and improvement of related mechanical equipment for planting, picking, processing, and transporting Rosa sterilis S.D. Shi. Compression damage is a common form of mechanical damage in agricultural products, especially during automated mechanical production. Therefore, this study establishes a three-dimensional model of seedless prickly pear fruit based on image processing technology and analyzes the compressive mechanical properties of seedless prickly pear under different directions through experiments combined with finite element method simulation. In both simulation and actual results, the average correlation coefficients were found to be 0.99 and 0.98 for the vertical compression direction and the horizontal compression direction, respectively. The above results show that our finite element compression model can provide a comprehensive understanding of the mechanical properties of Rosa sterilis S.D. Shi fruits under different directional loads. There is significant directional sensitivity in the compression resistance of Rosa sterilis S.D. Shi fruits have horizontal compression resistance greater than vertical compression resistance. The results of this study are of great significance for the development of mechanized automation in the Rosa sterilis S.D. Shi industry and for ensuring the quality of Rosa sterilis S.D. Shi fruits.

Positioning accuracy and post-treatment changes in the mandibular arch after insertion of a CAD/CAM titanium retainer.

Fixed retention is the method of choice for permanent stabilization of the treatment outcome. In recent years, CAD/CAM techniques have been developed to produce retainers with high precision and tension-free fit. The aim of this retrospective study was to evaluate the suitability of a semi-industrial retainer manufacturing process (office-based construction, external laboratory manufacturing) in terms of positioning accuracy and post-treatment changes. The accuracy of 41 retainers that were digitally designed and produced from a titanium plate by water jet cutting was analyzed. The patient received the retainer through fixation with dental flosses, without using a transfer tray. We compared the position in the mouth after insertion with the virtual setup using 3D software for superimposition. Intraoral scans of 25 CAD/CAM retainers and 25 0.0175" hand-bent retainers were evaluated after one year of usage. We measured the width between the canines, the angle between the lateral incisors, and the angle of contact between the canines and the lateral incisors. The largest and significant positioning deviations occurred in the vertical position, whereas positional changes in the horizontal and sagittal were small. The CAD/CAM retainers and the hand-bent retainers showed similar and minimal post-treatment alterations, which were not statistically significant. Semi-industrial CAD/CAM titanium retainers offer good positioning accuracy in the mandible even without a transfer tray. Increased deviations between planned and actual position only occur in the vertical plane. In addition, these retainers offer good retention properties with minimal posttreatment changes, making them suitable for permanent retention.

Layered Growth of 3D Snowflake Subject to Membrane Effect and More than One Nucleation Center by Means of Cellular Automata

In this work, it is taken into account that in nature, due to pressure and temperature, water drops in general are either spherical or ellipsoidal. Thus, starting from a more general structure, a 3D elliptical surface (oblate spheroid) is constructed, which, by means of parameters, can be turned into a spherical shape. Hexagons are built on a rectangular horizontal plane, then this plane is passed through an elliptical surface at height h, which is determined by a parameter θ. As a result of the cutting of these surfaces, a curve and a plane are obtained, both horizontal ellipsoidal; if these hexagons are within the perimeter of the horizontal ellipse obtained as a function of θ, they are marked with an N, and if they are outside the perimeter, they are marked with an E. Several frozen nucleation centers are established, either in the same layer or in different planes, marking them with an F and their first eight neighbors with a B. The calculations based on a modified snowflake model are carried out tile by tile and layer by layer, governed by the thermodynamic factors α, β, and γ, leading to results that depend on the position of the nucleator, which can be symmetrical or asymmetrical for a snowflake with more than one nucleation center and an external surface formed by water vapor that functions as a membrane.

Diffuse Ionized Gas in the Anticenter of the Milky Way

Abstract Using data from the Large Area Multi-Object fiber Spectroscopic Telescope Medium-Resolution Spectroscopic Survey of Nebulae, we create a sample of 17,821 diffuse ionized gas spectra in the anticenter region of the Milky Way by excluding fibers in the directions of H ii regions and supernova remnants. We then analyze the radial and vertical distributions of three line ratios ([N ii]/Hα, [S ii]/Hα, and [S ii]/[N ii]), as well as the oxygen abundance. [N ii]/Hα and [S ii]/Hα do not exhibit a consistent, monotonic decrease with increasing Galactocentric distance (R gal). Instead, they show enhancement within the interarm region, positioned between the Local Arm and the Perseus Arm. [S ii]/[N ii] has a radial gradient of 0.1415 ± 0.0646 kpc−1 for the inner disk (8.34 < R gal < 9.65 kpc) and remains nearly flat for the outer disk (R gal > 9.65 kpc). In the vertical direction, [N ii]/Hα, [S ii]/Hα, and [S ii]/[N ii] increase with increasing Galactic disk height (∣z∣) in both southern and northern disks. Based on the N2S2Hα method, which combines [S ii]/[N ii] and [N ii]/Hα, we estimate the oxygen abundance. The oxygen abundance exhibits a consistent radial gradient with R gal, featuring a slope of −0.0559 ± 0.0209 dex kpc−1 for the inner disk and a similar slope of −0.0429 ± 0.0599 dex kpc−1 for the outer disk. A single linear fitting to the entire disk yields a slope of −0.0317 ± 0.0124 dex kpc−1. In the vertical direction, the oxygen abundance decreases with increasing ∣z∣ in both southern and northern disks.

Slip Risk on Surfaces Made with 3D Printing Technology

Slip risk on surfaces used by humans or active in mechanisms is studied to mitigate its effects or harness its beneficial outcomes. This article presents pioneering research on the risk of surfaces created using 3D printing technology. The study examines three materials (Polylactic Acid, PLA; Polyethylene Terephthalate Glycol, PET-G; and Thermoplastic Polyurethane, TPU), considering three print head movement directions relative to the British Portable Skid Resistance Tester (BSRT) measurement direction. In addition, surface roughness tests were performed. Dry tests showed that the structure created by the printing direction perpendicular to the movement direction is the safest in terms of slip risk. The SRVs of the measured samples on a qualitative scale were classified on this scale as materials with low or extremely low slip risk (ranging from 55 to 90 SRV dry and 35 to 60 SRV wet). Referring to the influence of the type of material on the SRV, it was found that the safest material in terms of reducing the risk of slipping in dry conditions is TPU and, in wet conditions, PLA. During wet tests, the best properties that reduce the risk of slippage in most cases are shown by the printing direction on a horizontal plane at an angle of 45° to the direction of movement. Statistical analysis showed that the printing direction and roughness do not have a statistically significant effect on the SRV, but the type of material and the type of method (dry and wet) and their interaction have a significant effect.

In-Situ Stress Prediction of Deep Coal Reservoir Considering Anisotropy: A Case Study of the North-Central Zijinshan Block, North China

Hydraulic fracturing can significantly enhance coalbed methane production, with in-situ stress playing a crucial role in this process. Our study focuses on calculating in-situ stress in the deep 8+9# coal seam in the north-central Zijinshan block. Leveraging data from acoustic logging and hydraulic fracturing tests, we developed a stress prediction model tailored to the area’s geology. We analyzed stress’s impact on fracturing behavior and the origins of mechanical anisotropy in deep coal reservoirs using μ-CT imaging. Our results show that the Anderson-modified model, accounting for transverse isotropy, offers greater accuracy and applicability than traditional models. The study area exhibits a normal faulting stress regime with significant stress contrasts and maximum horizontal principal stress aligned with the east-west geological stress direction. After hydraulic fracturing, fractures form a complex fracture system resembling elongated ellipses in the coal reservoir, primarily extending in the vertical direction. To control fracture height and prevent penetration through the roof and floor, regulatory measures are essential. μ-CT analysis revealed the distribution of primary fractures, pores, and minerals in the coal, contributing to mechanical anisotropy. This research advances CBM development in the Zijinshan block and similar regions by refining stress prediction and fracturing propagation methods.

Thermo-mechanical behaviour of energy pile considering non-uniform initial ground temperatures

Ground temperature varies along the vertical direction at shallow depths, whose influences on the thermo-mechanical response of energy piles during heating and cooling processes remain unclear so far. This paper aims to fill this gap by performing finite element numerical analysis based on Comsol Multiphysics software, taking energy piles in the Yellow River flooded area as an example. A three-dimensional numerical model is established and is then validated by comparing with published experimental results. Parametric analyses are conducted with a focus on the heat exchange efficiency, temperature distribution, displacement and axial stress of energy piles caused by heating in summer and cooling in winter. It is found that the ignorance of ground temperature variation could lead to: (i) overestimation of the heat exchange efficiency in both winter and summer; (ii) underestimation of pile head displacement in summer and overestimation in winter; (iii) overestimation of the axial stress in summer and underestimation in winter.

Left neck and right biceps muscle vibrations have similar effects on perceived body orientation

Vibrating muscles to manipulate proprioceptive input creates the sensation of an apparent change in body position. This study investigates whether vibrating the right biceps muscle has similar effects as vibrating the left posterior neck muscles. Based on previous observations, we hypothesized that both types of muscle vibration would shift the perception of healthy subjects’ subjective straight-ahead (SSA) orientation in the horizontal plane to the left. Such a finding would be extremely interesting for future treatment of spatial neglect, a disorder following right-sided stroke brain lesions. Twenty healthy participants (11 females, 9 males, aged 20–52) were tested under five conditions: baseline (no vibration), vibration of left neck muscles, vibration of right biceps with the arm fixed to the wall, vibration of right biceps with the arm lying on a table, and vibration of right triceps with the arm fixed to the wall. Participants had to align a laser pointer (by verbal instructions) with their perceived SSA position in complete darkness. ANOVA revealed significant SSA shifts with neck and biceps vibrations but not with triceps vibration. The largest leftward SSA shift occurred with right biceps vibration while the arm was lying on the table (-6.1°), followed by left neck muscle vibration (-6.0°), and right biceps vibration with the arm fixed to the wall (-5.4°). Post-hoc power analyses showed high power (> 0.98) for the significant differences compared to the baseline condition. The finding that right biceps vibration affects SSA perception similarly to left neck muscle vibration offers potential for clinical applications in treating spatial neglect. Future research should explore the therapeutic efficacy of vibrating the right biceps in neurological patients with spatial neglect.

Reconfiguration and dynamics of clamped fibers under finite-amplitude surface gravity waves

We investigate the behavior of a flexible stem completely submerged under a surface gravity wave of finite amplitude using fully resolved direct numerical simulations. By varying the rigidity of the stem over ten orders of magnitude, we explore its motion in the drag-dominated regime with realistic air and water properties. Our findings reveal two distinct structural responses of the stem depending on the ratio between its natural frequency (fnat) and the wave frequency (fwave). For fnat/fwave≫1, the stem maintains on average a straight configuration and exhibits streamwise oscillations in phase opposition with the wave, moving symmetrically with respect to the vertical direction. Conversely, for fnat/fwave≪1, the stem reconfigures under the influence of the Stokes drift, bending forward and breaking the symmetry, and exhibits oscillations that are more coherent with the surrounding flow field. Resonance is observed when fnat≈fwave. These results provide insights into the dynamics of slender vegetation and manmade structures in wave fields, offering valuable implications for marine biology and engineering. Published by the American Physical Society 2025

Slit tube responses and rock fracture characteristics in slit charge blasting under high in situ stress

AbstractDeep mining of natural resources, like coal, is increasingly utilizing directional blasting technology with slit charge for rock blasting at greater depths. This study, based on numerical simulation methods, analyzes the dynamic behavior of slit charge blasting in three aspects: slit tube dynamic response, hoop stress evolution, and crack propagation. According to research findings, the failure mode of the slit tube mainly manifests as a tensile fracture of the inner wall and a shear fracture at the end connection, where the end connection of the slit tube is the weak point of the overall structure. The dynamic response of the slit tube mainly exhibits radial response in the vertical direction of the slit and hoop response in the slit direction. The hoop tensile stress plays a crucial role in determining the spread of cracks caused by explosions. As the in situ stress increases, the peak hoop tensile stress reduces, and the peak hoop compressive stress increases. This hinders the propagation of cracks. In addition, the directional impact is most pronounced in the middle of the borehole, with the longest primary directional crack observed. Conversely, the directional impact is least favorable near the bottom of the borehole. When the in situ stress reaches 60 MPa, the purpose of directional fracture has not been achieved, suggesting combining presplit blasting for in situ stress relief to improve rock breaking efficiency.

Dynamic Solar Panel Orientation for Maximizing Efficiency Based on Trajectory of the Sun

ABSTRACTThe rapid expansion of photovoltaic technology is driven by a critical need for electricity and a growing emphasis on sustainable energy solutions. However, the primary challenge is that the efficiency of solar panels remains insufficient, making them less competitive compared to other energy sources in the long term. This inefficiency not only limits the overall power output but also discourages private investors due to slight benefit and low rate of return of investment. Consequently, many potential projects are stalled, as investors are hesitant to commit resources to technologies that do not promise adequate profitability. Additionally, low efficiency wastes the installation space, and the variability in solar energy generation further complicates the economic viability of solar investments. To tackle this issue, the objective of this research is to develop an innovative active‐dynamic strategy aimed at enhancing the operational efficiency of solar panels through advanced Sun‐tracking mechanisms. By integrating an ARM controller with a TSL2550 sensor module, our system orchestrates precise servomotor adjustments to optimize solar panel alignment based on the Sun's trajectory in both vertical and horizontal planes. Furthermore, employing state‐of‐the‐art Micro‐Python coding techniques significantly boosts power generation. Empirical data from practical deployments demonstrate a minimum fourfold increase in the overall efficiency of the solar energy system following the implementation of this strategy.

Analytical Model of Temperature-Induced Deformation for Tunable Thermal Expansion Metamaterial

Tunable thermal expansion metamaterials exhibit superior shock absorption performance in the field of high-precision equipment, but the applications are currently restricted by the unclear quantitative relationship of temperature-induced deformation. Herein, this work leverages the virtual work principle and the deformation geometric relationship to establish a generic temperature-induced deformation control model for bi-materials by utilizing the key variable coverage ratio under the condition of no deformation in the vertical direction. The feasible region regarding flexibility for the internal serpentine unit and lattice structure with different coverage ratios is given. The combination of the finite element and experimental methods is adopted to examine temperature-induced deformation, which presents tunable thermal expansion performances associated with the coverage ratio and temperature. This work, based on the established deformation coordination relationship of dual-material temperature-sensitive metamaterials, achieves temperature-induced deformation control and provides a reference for structural design adaptable in various working conditions such as vibration isolation and vibration reduction in complex engineering such as aerospace and so on. By strategically designing the coverage of the two structures within the specified range to maintain equivalent flexibility, the ultimate deformation of the serpentine unit is reduced by one-half due to deformation induced by temperature variations.