Dynamic Mechanical Analysis Tests Research Articles

Multi-Criteria Evaluation of the Failure of CFRP Laminates for Frames in the Automotive Industry.

Methods to predict the fracture of thin carbon fibre-reinforced polymers (CFRPs) under load are of great interest in the automotive industry. The manufacturing of composites involves a high risk of defect occurrence, and the identification of those that lead to failure increases the functional reliability and decreases costs. The performance of CFRPs can be significantly reduced in assembled structures containing stress concentrators. This paper presents a hybrid experimental-numerical method based on the Tsai-Hill criterion for behavior of thin CFRPs at complex loadings that can emphasize the threshold of stress by tracing the σ-τ envelope. Modified butterfly samples were made for shearing, traction, or shearing-with-traction tests in the weakened section by changing the angle of force application α. ANSYS simulations were used to determine the zones of maximum stress concentration. For thin CFRP samples tested with stacking sequences [0]8 and [(45/0)2]s, the main mechanical characteristics have been determined using a Dynamic Mechanical Analyzer (DMA) and ultrasound tests. A modified Arcan device (AD) was used to generate data in a biaxial stress state, leading to the characterization of the material as a whole. The generated failure envelope allows for the prediction of failure for other combinations of normal and shear stress, depending on the thickness of the laminations, the stacking order, the pretension of the fasteners, and the method used to produce the laminations. The experimental data using AD and the application of the Tsai-Hill criterion serve to the increase the safety of CFRP components.

The In-Situ Mechanical Properties of Carbon Fiber/Epoxy Composite under the Electric-Current Loading.

The Joule heating behavior of the carbon fiber/epoxy composite (CF/EP) was studied in this work, as well as their influence on the in-situ mechanical properties of the composites and their de-icing performance. The equilibrium temperature of the CF/EP composite could be conveniently adjusted by tuning the current according to the Joule’s law. Dynamic mechanical analysis (DMA) tests indicated that the rigidity and stiffness of the fiber-reinforced composite decreased with increasing temperature, and the glass transition temperature (Tg) of the composites was around 104 °C. It was found that the flexural properties of the composites in situ, measured under the electric-current loading, depended on the current value in the range of room temperature to Tg. With increasing the loading current, either the flexural modulus or strength of CF/EP decreased gradually. Such results could be explained that the higher current loading, the larger Joule heat, led to the higher operating temperature of the composite samples and the evolution of their mechanical properties accordingly. Vickers hardness tests indicated that the micro-hardness of the composite decreased with the increase of the operating temperature, which coincided with the evolution of its flexural properties with the electric-current loading. The dependence of the failure behaviors of the CF/EP on the loading current was revealed by the analysis of their fractured surface, where micro-buckling, kinking, fiber pull-out and breakage were involved. A preliminary study indicated that less energy was consumed for the deicing of the same amount of the ice with the CF/EP composite in the case of less electric-current loading. The research on the Joule heating effect of CF/EP and their corresponding mechanical properties benefits the design and direct application of the composites under the electric-current loading.

Mechanical flexible epoxy resins with 100% bio‐based carbon content based on epoxidized vegetable oils

AbstractThis work describes the development and characterization of mechanical flexible epoxy resins based on epoxidized vegetable oils (EVO) and sebacic acid. Different oil types (linseed oil, hempseed oil, and soybean oil) with varying epoxy equivalent weight (EEW) were used. Formulation and processing parameters were systematically optimized by differential scanning calorimetry and Fourier‐transform infrared spectroscopy. The effect of the EVO type and EEW on thermo‐mechanical and mechanical properties were investigated by dynamic mechanical analysis and tensile tests at different temperatures. The EVO type had a strong effect on the thermo‐mechanical and mechanical properties of the resin. However, for the investigated commercial epoxidized linseed oils, the EEW had no effect on these properties. With epoxidized linseed oil the highest Tg and the best mechanical properties (highest tensile strength and toughness) were achieved.

Biobased Polyamide Blends (PA610/PA1010)—A Miscibility Analysis

In the present work, blends of biobased polymers were formulated using two polyamides made from biorenewable resources. Polyamide 610 (PA610) and polyamide 1010 (PA1010) were meltmixed in different compositions, producing polymer blends with renewable carbon content from 74 to 89%. Physical properties of the PA610/PA1010 blends were investigated by differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA) and impact strength testing. From the DMTA results, it was possible to identify a single glass transition temperature (Tg) for each PA610/PA1010 blend. The measurements of the impact testing show intermediate values compared to the pure polymers. The DSC thermograms show melting point depression for the PA610 crystals with increasing PA1010 content. All those results indicate the two polyamides are fully miscible in the melt in the composition range investigated.

Mechanical properties of marine polymer foams in the arctic environment

Experiments were conducted to characterize the mechanical behavior of Divinycell H100 and HCP 30 foams operating in the Arctic, where winter temperatures fall below −50 °C. It was found that the modulus and yield strength of both foams increased as the temperature decreased from 23 to −60 °C. The increase in the compression and shear modulus could be as high as 100%. While foam yield strengths increased as the temperature cooled, no significant increase in their tensile and shear strengths were found. Instead, the foams experienced a substantial reduction in ductility and toughness as the temperature cooled. Ductility and toughness of both foams were 3–5 times lower at −60 °C compared to 23 °C. Izod impact tests indicated that the ductile-to-brittle transition temperatures of Divinycell H100 and HCP30 foams were −50 and −60 °C, respectively. Dynamic Mechanical Analysis (DMA) testing revealed thatβrelaxation transition temperatures, which are associated with nil ductility, existed at −66 and −74 °C, for the Divinycell H100 and HCP 30 foams, respectively.

Low-Temperature Fibre Direct Compounding of Cellulose Fibres into PA6.

This study reports on the development of a novel polymer processing approach that combines low-temperature (LT) processing and fibre direct compounding (FDC) to reduce the thermal stress on thermosensitive components that occurs during compounding and subsequent injection moulding (IM). Composites based on polyamide 6 (PA6) and cellulose fibres (CeF) were prepared using an LT-FDC process and in parallel with a conventional approach using a twin-screw extruder and IM. The morphological, optical, thermal, and mechanical properties of the prepared samples were investigated using optical microscopy (OM), differential scanning calorimetry (DSC), colorimetry, dynamic mechanical analysis (DMA) and tensile tests. Composites prepared using LT-FDC exhibited worse fibre dispersion but lower fibre degradation. In comparison to neat PA6, the LT-FDC composites had increased tensile modulus (Et) and storage modulus (E′) at 120 °C by up to 32% and 50%, respectively, while the tensile strength (σm) decreased by 20%.

A vehicle-bridge interaction vibration model considering bridge deck pavement

The bridge pavement subjected to vehicle loads is the most vulnerable component in the highway bridge and overloaded vehicles can result in serious damage to the bridge pavement more easily. Therefore, it is necessary to consider the pavement in vehicle-bridge interaction (VBI) system. However, the bridge pavement is not considered in the traditional VBI system or the viscoelasticity of bridge pavement is ignored. In this study, a new vehicle-pavement-bridge interaction (VPBI) system is established. The viscoelastic asphalt pavement is simulated with the continuously and uniformly distributed spring-damper. The equivalent stiffness coefficient and equivalent damping coefficient of the pavement are determined through dynamic mechanical analysis (DMA) test and finite element method. The equations of motion for VPBI system can be derived using Lagrange equation and the modal superposition method. Then the crucial parameters such as displacement at mid-span of bridge, acceleration of vehicle body, tire contact force, and pavement deformation are obtained. The effects of vehicle velocity, bridge span, tire contact area, pavement stiffness coefficient, and pavement damping coefficient on VPBI responses are analyzed. The results show that (1) The pavement is compressive during vehicle passing bridge and its dynamic deformation fluctuates around initially static deformation of pavement. (2) Increasing the stiffness of pavement can rapidly reduce the deformation of pavement, while the pavement damping has the opposite effect. (3) The increase of bridge span can conduct exponentially growth of dynamic responses of VPBI system. The pavement deformation will increase by 7.9% if the bridge span is lengthened by 5 m. This study provides a reliability response analysis method for VPBI system.

Synthesis of a phosphorus-based epoxy reactive flame retardant analog to diglycidyl ether of bisphenol A (DGEBA) and its behavior as a matrix in a carbon fiber composite

This paper describes the synthesis of a phosphorus-based flame retardant that is a chemical analog of diglycidyl ether of bisphenol A (DGEBA), as well as its incorporation as a matrix into carbon fiber laminates. Carbon fiber composites, if used for structural applications in mass transport vehicles (aircraft, trains), will require some aspects of improved fire performance to be used safely in those applications. The first phase of work involved the development of two separate synthesis routes to produce the flame retardant monomer, referred to as Phosphorus-DGEBA or simply P-DGEBA. The second step was to determine the viability of the compound's polymerization behavior through various experimental mixing formulations and curing conditions with an aliphatic amine curing agent. Differential scanning calorimetry (DSC) was used to evaluate the curing behavior of P-DGEBA when mixed with DGEBA and an aliphatic amine curing agent and dynamic mechanical analysis (DMA) was used to observe the glass transition temperature (Tg) of the carbon fiber composites. Thermogravimetric analysis (TGA) was also used to investigate the thermal stability and thermal degradation behaviors of the P-DGEBA/DGEBA blends. The final step included the fabrication of composites and their flammability testing using a cone calorimeter. DMA testing for P-DGEBA measured a Tg that was 10 °C higher than a DGEBA based carbon fiber composite, and DSC studies found that the P-DGEBA / DGEBA blend polymerized well with the amine curing agent. The TGA, MCC, and cone calorimeter data yielded mixed results with TGA and MCC suggesting a more condensed phase / char formation flame retardant activity for P-DGEBA, while cone calorimeter suggested a more vapor phase flame retardant activity. Overall, the P-DGEBA shows some promise as a reactive FR for epoxy + carbon fiber composites, but more study is needed.

A visco-elastoplastic constitutive model of aircraft polymethylmethacrylate related to strain rate and temperature

The visco-elastoplastic mechanical behavior related to the applied strain rate and temperature around the glass transition temperature of Polymethylmethacrylate (PMMA) has been systematically investigated. The uniaxial tensile test was performed at strain rate and temperature rangs 1.0 × 10−4–1.0 × 10−2 s−1 and 363–393 K, respectively, and the Dynamic Mechanical Analysis (DMA) test was carried out between 363 K and 413 K at various frequencies. Moreover, the robust complex constitutive model considering the temperature and strain rate effect is proposed. A nonlinear viscoelastic model is established to describe the viscoelastic response on the basis of the Zhu-Wang-Tang (ZWT) model and the time temperature equivalence principle, including the dependence of strain rate and temperature. Considering the yield stress, the cooperative model is adopted. The viscoplastic mechanical response is manifested as the competition performance of the softening deformation and hardening behavior. The predicted mechanical responses maintain good consistency with the experimental results, indicating that the visco-elastoplastic constitutive model proposed can accurately predict the mechanical behavior of PMMA materials within the imposed strain rate and near the glass transition temperature range.

Spatially controlling the mechanical properties of 3D printed objects by dual-wavelength vat photopolymerization

To date, the 3D printing of polymers with heterogeneous and locally controlled material properties is still a challenging area in additive manufacturing. In terms of vat photopolymerization 3D printing, the fabrication of multi-material objects typically relies on an automatic material exchange of different resin vats. However, along with the high complexity of the printing equipment, this technique suffers from a low build speed and often yields 3D printed objects with week interlayer adhesion across the various material interfaces. Herein, we use chemo-selective wavelengths to fabricate objects with multi-material properties by dual-wavelength vat photopolymerization 3D printing employing a single vat. The photopolymers’ stiffness and flexibility are conveniently controlled by two photoreactions working at two different wavelengths. In particular, a dual photocurable resin is applied containing multi-functional acrylates, which are cured by a radical induced chain growth reaction at 405 nm, and bi-functional epoxy monomers, which additionally undergo cationic curing upon UV exposure (365 nm). FT-IR experiments confirm the wavelength selective network formation whilst dynamic mechanical analysis and tensile tests give evidence of the distinctive difference of the related mechanical properties. By being able to produce soft (ε = 24%, σ = 1.0 MPa) and stiff (ε = 4%, σ = 39.1 MPa) networks with a single resin vat, we demonstrate the efficient fabrication of 3D structures with locally controlled mechanical properties using a dual-wavelength 3D printer operating at 405 and 365 nm. In contrast to previous work in this field, we were able to significantly expand the range of mechanical properties by appropriate selection of the acrylic components and to drastically accelerate the build speed by changing the cationic photoinitiator and using a customized printer with high intensity LED sources.

Rosin natural terpenes as processing aid for polyhydroxyalkanoate: Thermal, mechanical, and viscoelastic properties

AbstractRosin natural terpene (Dertoline) is compounded with a bacterial thermoplastic polyesters polyhydroxyalkanoate (PHA), specifically here poly(3‐hydroxybutyrate) (PHB), a biodegradable and biocompatible polymer. The compatibility of the blend is examined with differential scanning calorimetry and thermal gravimetry analysis. In the range of concentration of Dertoline, from 5 to 15 wt%, a cold crystallization peak first shifts to slightly higher then lower temperature. Dynamical mechanical analysis and tensile tests confirm that the addition of Dertoline slightly decreases the elastic modulus. The degree of crystallinity again increases then decreases with the content of Dertoline. Polarized light microscopy reveals smaller diameter spherulites for PHB/Dertoline blends and their presence is discussed in relation to tensile tests. Overall, the addition of Dertoline has limited effects on mechanical properties of the blends: the stress at break and the strain at break. In addition, oscillatory rheology at different temperatures provides the activation energies and the parameters of a generalized Maxwell model. The temperature dependence of the rheological properties follows an Arrhenius form. Finally, transient step viscosity measurements are used in order to quantify the PHB thermal degradation.

The effect of boron nanoparticle reinforcement on the structural and mechanical performance of nanocomposites and bonded joints exposed to an acid environment

Polymer materials and adhesively bonded metal joints are subjected to different harsh environments, resulting in degradation in their structural and mechanical properties. The objective of the presented research is to investigate in detail the effect of the sulfuric acid (H2SO4) environment on the structural and mechanical performance of boron nanoparticles reinforced epoxy-based composites and adhesively bonded joints. Epoxy-based composites and single lap joint (SLJ) samples were produced with and without 2 wt% silane-modified boron nanoparticles (BN and B4C) to that end. The epoxy composites and SLJ samples were exposed to H2SO4 solution at 40 °C for 20, 40 and 60 days to assess the effect of acid environment, exposure time and boron nanoparticles. The weight gain, Fourier Transform Infrared Spectroscopy (FT-IR), and Scanning Electron Microscopy (SEM) analyses were performed to examine the interaction of the composites with the acid environment, while Dynamic Mechanical Analysis (DMA) and tensile tests were performed to specify the changes in mechanical properties of the epoxy composites. Similarly, a tensile test was applied to examine the effects of the acid environment on the SLJ samples. When the results were analyzed, it was seen that the boron nanoparticles reinforced composites and bonded joint samples showed higher performance in terms of structural and mechanical properties in the acid environment compared to the unreinforced samples. Degradation of epoxy composites and bonded SLJ samples in the acid environment was significantly improved with boron nanoparticle reinforcement to the epoxy.

Study on Tensile Mechanical Properties of GAP/CL‐20/HMX Propellant

AbstractTo study the tensile properties of GAP/CL‐20/HMX (GCH) propellant, a new generation high energy solid propellant, uniaxial tensile test and dynamic mechanical analysis (DMA) test were performed at different temperatures (233.15–333.15 K) and strain rates (0.000476–0.9524 s−1). The experimental results show that, unlike Hydroxyl‐terminated Polybutadiene (HTPB) and Nitrate Ester Plasticized Polyether (NEPE) propellants, GCH propellant have special arc section in the initial tensile stage at room temperature and high temperature. This phenomenon may be caused by the stretching of the curled molecular chains. The variation of mechanical properties shows that the maximum tensile strength and initial elastic modulus increase with the decrease of temperature and the increase of strain rate. The variation of maximum elongation is complex, which increases with the increase of strain rate at room temperature and high temperature, and first increases then decreases with the increase of strain at low temperature. The constitutive model of the GCH propellant was established by introducing the chain extension and the debonding damage thresholds. Both of which show a linear double logarithmic increasing trend with the increase of strain rate at room and high temperature. The latter shows a linear double logarithmic decrease trend with the increase of strain rate at the low temperature.

A method of automatically obtaining master surfaces of resin matrix composites by time–temperature superposition

AbstractThe time–temperature superposition (TTS) is a data processing method of viscoelastic mechanics, which is realized by translating and superposing the responses at different temperatures to get master curves beyond the test time or frequency. In this study, an automatic shift method is developed to obtain master surfaces of the carbon fiber reinforced plastics and epoxy resin. First step, an interpolation is used to process the dynamic mechanical analysis test data measured by frequency sweep/temperature step or continuous heating‐up method. Second step, the Prony series of the generalized Maxwell model are used to fit the storage and loss modulus at each temperature, which makes the fitting curves have physical meaning and causality. Third step, the automatic shift is achieved by minimizing the sum of squares of the vertical distances between two fitting curves. Last step, master surfaces are created by Prony series fitting and interpolation, and the storage modulus, loss modulus, loss factors, and relaxation modulus at any temperature, frequency or time can be found on the master surfaces. Both storage modulus and loss modulus are considered at same time according to the weight. The effects of different weights are studied.

Preparation and characterization of a low viscosity epoxy resin derived from m-divinylbenzene

To explore thermal and mechanical properties of epoxy material, difunctional aromatic epoxy--divinylbenzene dioxide (DVBDO) had been synthesized by epoxidizing divinylbenzene, using the metal acetylacetone compound grafted Fe3O4 particles as the catalyst. The catalyet had high conversion and epoxy selectivity and could be recyclable. Then the polymerization of DVBDO with different diamine curing agents were reported. The structure and viscosity of DVBDO were firstly characterized. Because it had low molecular weight and viscosity, DVBDO had excellent liquidity and formability. Subsequently to clarify the properties of epoxy thermosets, experiments to determine thermal and mechanical performances were carried out, such as differential scanning calorimetry (DSC), thermal gravimetric (TGA), dynamic mechanical analysis (DMA) and tensile test. It could be observed that the thermoset polymers using DVBDO as epoxy matrix had excellent thermal (Tg was about 201°C) and mechanical properties (tensile strength was 131.99Mpa). Possibly considering that this kind of thermoset polymers had higher rigidity and crosslink density. In conclusion, a new type of one-component liquid epoxy encapsulant material with low viscosity, good filling fluidity, strong heat resistance and excellent storage performance had been developed.

Modal performance degradation of naturally aged NBR

Damping is often an invisible requirement for a good mechanical design. To render the long-term service of viscoelastic dampers, it is essential for design engineers to estimate the degradation of the damping characteristics with age. Nitrile butadiene rubber (NBR) is a widely used damping and sealing material. Viscoelastic sandwich beam configurations have been used to mount electronic components for various automobile and aerospace applications. The present work emphasizes the estimation of modal parameter degradation of NBR with age in an oxidative environment. NBR is assumed to be homogeneous and isotropic and is allowed to age naturally with no load under ambient conditions. Fourier-transform infrared spectroscopy (FTIR) was used to detect age-related changes in the functional groups of the NBR material with age. Dynamic mechanical analysis (DMA) tests were performed to relate the complex properties of naturally aged materials to those of virgin materials in the frequency and temperature domains. Mechanical tests were performed to determine the hardness, elongation break, and failure stress of the virgin NBR and naturally aged NBR. The damping ability of the NBR was investigated using an unconstrained sandwich cantilever beam with aluminum as the base material. For sinusoidal sweep excitation, the influence of viscoelasticity on structural damping was investigated. Based on the experimental results, the damping ability of the NBR has been observed to degrade with age. As the age increased, the damping ability of the NBR decreased by 8% at the first resonance frequency and by 34% at the third resonance frequency.

Synthesis and characteristics of nonisocyanate polyurethane composed of bio‐based dimer diamine for supercritical CO2 foaming applications

AbstractNonisocyanate polyurethane (NIPU) was synthesized using different concentrations of C36‐alkylenediamine (C36DDA), hexamethylene diamine, and a cyclic carbonate monomer synthesized from bisphenol A epoxy resin and carbon dioxide. The structures, molecular weights, thermal behaviors, and stabilities of the NIPU copolymers were evaluated using 1H nuclear magnetic resonance, Fourier transform infrared spectroscopy, gel permeation chromatography, thermogravimetric analysis, and differential scanning calorimetry measurements. All synthesized NIPUs were amorphous and exhibited good Td−5% thermal stabilities above 250°C; Tg decreased from 73 to 51°C as C36DDA content increased from 0% to 10% based on dynamic mechanical analysis tests. Furthermore, ethylenediamine (EDA) as a chain extender incorporating a small amount of crosslinker 1,2,4,5‐benzenetetracarboxylic acid (PMA) can enhance the melt strength of a partially three‐dimensional network, and the attained NIPU showed elastic properties. Thus, the NIPU synthesized with 7.5% and 10% C36DDA containing small amounts of EDA and PMA were suitable choices for supercritical CO2 foaming; their morphologies and mechanical behaviors were examined by scanning electron microscopy and DMA, and the densities of foamed NIPU with 7.5% and 10% C36DDA were calculated as 432 and 215 kg m−3 with pore sizes of 10–20 μm, respectively. The maximum stresses were attained at 149.5 and 123.4 kPa, and the foamed NIPU displayed rigid foam behaviors owing to the compression behaviors of the stress–strain curves.

Preparation and Evaluation Mechanic Damping Properties of Fused Silica Powder@Polyurethane Urea/Cement Composites.

In this paper, cement based on fused silica powder @ polyurethane urea (FSP@PUU) with a micro constrained damping structure was studied. Firstly, FSP@PUU core-shell particles were prepared by heterogeneous stepwise addition polymerization method and added into cement paste as damping filler to form a micro-constrained damping structure inside cement paste. The mechanical property and damping performance of cement-based composites were characterized by compressive strength, dynamic mechanical analysis (DMA) test and modal vibration test. The results showed that the damping performance of FSP @ PUU cement-based composites was affected by temperature, and the loss tangent of cement with 6wt% FSP@PUU increased to about 0.057 at −35 °C to 35 °C, which was 1.5 times cement paste within the glass transition temperature. With 6 wt% FSP@PUU, the damping ratio of cement-based composites increased by 58% compared with cement paste in the frequency range of 175–300 Hz, while the compressive strength decreased by only 5%. The cement with suitable FSP@PUU possesses excellent damping performance.

Investigation of the dynamic mechanical analysis and mechanical response of 3D printed nylon carbon fiber composites with different build orientation

AbstractThe effect of printing angle on the mechanical behavior of 3D printed carbon fiber reinforced nylon composites is investigated. Three types of print angles, namely angular, vertical and horizontal, are considered in the present study. Dynamic mechanical analysis, and flexural and tensile tests are performed to evaluate the mechanical behavior of specimens. The dynamic mechanical analysis test reveals higher storage and loss modulus in horizontal specimens as compared with angular and vertical specimens, mainly credited with better mechanical restraints imposed by carbon fibers on the matrix movement. Higher damping capability was also noted with horizontal specimens. Flexural properties of horizontally printed specimens are better as compared with the other configurations attributed to good stress transferability between the constituents. Tensile specimens also depict higher modulus and strength for horizontally printed specimens owing to higher resistance offered by the carbon fibers to tensile loading and good compatibility of constituents. Finally, the structure–property relationships are understood by analyzing the specimens under a high‐resolution scanning microscope.

New Application Field of Polyethylene Oxide: PEO Nanofibers as Epoxy Toughener for Effective CFRP Delamination Resistance Improvement.

Delamination is the most severe weakness affecting all composite materials with a laminar structure. Nanofibrous mat interleaving is a smart way to increase the interlaminar fracture toughness: the use of thermoplastic polymers, such as poly(ε-caprolactone) and polyamides (Nylons), as nonwovens is common and well established. Here, electrospun polyethylene oxide (PEO) nanofibers are proposed as reinforcing layers for hindering delamination in epoxy-based carbon fiber-reinforced polymer (CFRP) laminates. While PEO nanofibers are well known and successfully applied in medicine and healthcare, to date, their use as composite tougheners is undiscovered, resulting in the first investigation in this application field. The PEO-modified CFRP laminate shows a significant improvement in the interlaminar fracture toughness under Mode I loading: +60% and +221% in GI,C and GI,R, respectively. The high matrix toughening is confirmed by the crack path analysis, showing multiple crack planes, and by the delamination surfaces, revealing that extensive phase separation phenomena occur. Under Mode II loading, the GII enhancement is almost 20%. Despite a widespread phase separation occurring upon composite curing, washings in water do not affect the surface delamination morphology, suggesting a sufficient humidity resistance of the PEO-modified laminate. Moreover, it almost maintains both the original stiffness and glass transition temperature (Tg), as assessed via three-point bending and dynamic mechanical analysis tests. The achieved results pave the way for using PEO nanofibrous membranes as a new effective solution for hindering delamination in epoxy-based composite laminates.