Modeling the effects of interfacial properties on the temperature dependent tensile strength of fiber reinforced polymer composites

Glass fiber‐reinforced polymers are widely used in structural systems as load‐bearing elements at both high and low temperatures. This investigation presents the evaluation of glass fiber‐reinforced unsaturated polyester under quasi‐static tension loading at extremely cold temperatures. This work includes the preparation of polyester resin sheets and E‐glass fiber cloth reinforced polyester composite to determine the tensile properties and failure modes over a range of high to very cold temperatures over 60°C to −80°C. The results show that fiber reinforced polyester has higher strength at all temperatures compared to the unreinforced polyester matrix. The reinforced specimens exhibit a more uniform brittle trend at temperatures below room temperature (RT) and a reasonable ductility at and above RT. Tensile properties of the unreinforced material were found to degrade above RT. The composite has the highest strength at the lowest temperature of −80°C. Both monolithic and reinforced polyester are brittle in nature at temperatures below RT, though reinforced composites show slight ductility.

Section: Resultsmentioning

confidence: 99%

Section: Tensile Properties At Different Temperaturesmentioning

confidence: 93%

Tensile properties of glass fiber‐reinforced polyester composites at extreme cold temperatures

Ahmed

Khanna

2020

“…It can be seen that the good consistency between theoretical predictions with the two experimental results at elevated temperatures is obtained. Additionally, it is suggested in Thomason et al's study that the temperature dependence of ISS is remarkably similar to that of matrix storage modulus, [3,46,50] whose essence is Young's modulus. For comparison, the matrix storage modulus is also utilized to predict the ISS at low and elevated temperature, and the ISS at room temperature is as reference.…”

Section: Fiber Agglomerationmentioning

confidence: 91%

“…As shown in Figure 3, the prediction is also in good consistency with the experimental ISS data, indicating that using matrix storage modulus is reasonable. It can be concluded that [50] 442 [51] 488 [7] 442 [51] T A B L E 2 The specific material parameters for three different Short fiber/polymer composites (SFPCs)…”

Section: Fiber Agglomerationmentioning

confidence: 99%

Theoretical characterization of the temperature‐dependent ultimate tensile strength of short‐fiber‐reinforced polymer composites

Yang

Liu

et al. 2021

Self Cite

Short fiber/polymer composites (SFPCs) are increasingly applied in the field of high-temperature structures. Its reliability at high temperatures has always been the core issue concerned by researchers. Here, utilizing the Force-Heat Equivalence Energy Density Principle, we developed a physically based model of temperature-dependent ultimate tensile strength (TDUTS) for SFPCs. This model quantitatively considers the evolution of residual thermal stress, interface, fiber, and matrix performance as temperature increases. Meanwhile, the influence of fiber agglomeration frequently observed in composites and fiber orientation and length distribution is taken into account in the proposed model. The model predictions over a wide temperature range are validated against the experimental data available from the literature, indicating its reasonability and accuracy. The comparison with Kelly-Tyson model and Li's model is also performed. Additionally, the quantitative effects of the fiber agglomeration and interfacial shear strength on the TDUTS are discussed in detail. The present research not only provides an accurate and feasible approach to estimate the TDUTS of SFPCs, but also offers some helpful insights for the fabrication and design of such composites.

“…[ 4,15 ] Moreover, the theoretical characterization on the temperature dependent tensile strength of fiber/polymer composites is a crucial issue for exploring their damage failure behavior. [ 2,16,17 ]…”

Section: Theoretical Derivationsmentioning

confidence: 99%

Modeling and influencing factor analysis for the temperature and damage dependent tensile strength of fiber/polymer composites

Zhang

et al. 2022

Self Cite

With the rapid development of aerospace technology, the application of fiber/ polymer composites in extreme environments especially at high temperature gets more and more extensive, the tensile properties of fiber/polymer composites in different temperatures environment have become a critical issue of concern. In this work, a temperature and damage dependent tensile strength (TDDTS) model for fiber/polymer composites was presented based on the force-heat equivalence energy density principle and the damage failure analysis. The TDDTS model considers the combined effects of temperature, the evolution of constituents' properties and damage with temperature. Meanwhile, the TDDTS model has advantages from the aspects of prediction accuracy and convenience by comparison with our previous model and the Curtin's model.Further on, the influencing factors analysis of fiber/polymer composites concerning the tensile properties and damage evolution with temperature was conducted. This study offers a reliable model for predicting the TDDTS of fiber/polymer composites, and provides important insight for the strength degradation mechanism and the damage evolution.