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  Volume 4, Number 1, March 2022 , pages 063-81
DOI: https://doi.org/10.12989/cme.2022.4.1.063
 
 open access

Temperature and strain rate dependent tensile strength model for short fiber reinforced polymer composites
Yong Deng, Yi Hao, Chao Zhang, Yangming Cao and Weiguo Li

 
Abstract
    Understanding and characterizing the tensile behavior of short fiber reinforced polymer composites (SFRPCs) under high temperature environments and dynamic loadings is of great significance for their wide application. In this work, a temperature and strain rate dependent tensile strength model is developed, based on the modified rule of mixture and the Force-Heat Equivalence Energy Density Principle. The combined effects of component properties, fiber length, fiber orientation, residual thermal stress, temperature and strain rate are taken into account. The proposed model is proved to be efficient in predicting the tensile strength of SFRPCs under a wide range of temperatures and strain rates, through the comparison between the experimental data and model predictions. Furthermore, based on the present model, the influencing factors analysis of tensile strength of SFRPCs and its evolution with temperature and strain rate is investigated and discussed. This work provides a solid theoretical basis for the design, optimization and tensile property prediction of SFRPCs under extreme conditions.
 
Key Words
    analytical modeling; short fiber reinforced polymer composites; strain rate; temperature; tensile strength
 
Address
Yong Deng: School of Civil Aviation, Northwestern Polytechnical University, Xi'an 710072, China; Collaborative Innovation Center of NPU, Shanghai 201100, China; Yangtze River Delta Research Institute of NPU, Taicang 215400, China
Yi Hao: School of Civil Aviation, Northwestern Polytechnical University, Xi'an 710072, China
Chao Zhang: School of Civil Aviation, Northwestern Polytechnical University, Xi'an 710072, China
Yangming Cao: Silicon Content Technology Co., Itd, Beijing 100095, China
Weiguo Li: College of Aerospace Engineering, Chongqing University, Chongqing 400044, China
 

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