A physically-based constitutive model for the shear-dominated response and strain rate effect of carbon fibre reinforced composites

Numerical Simulation Study on Strain Rate Effect of Fiber Reinforced Composites

10.21203/rs.3.rs-35692/v1 ◽

2020 ◽

Author(s):

Hui Ye ◽

Chang Liu ◽

Yanrong Zhu

Keyword(s):

Constitutive Model ◽

Strain Rate ◽

Composite Laminates ◽

Model Simulation ◽

Strain Rate Effect ◽

Rate Effect ◽

Fiber Reinforced Composites ◽

Reinforced Composites ◽

Fiber Reinforced ◽

Simulation Results

Abstract In order to study the effect of strain rate effect on the simulation precision of fiber reinforced composites, the dynamic enhancement factor (DIF) was introduced to modify the modulus and strength of the composite, and the modified Hashin failure criterion was used to establish a three-dimensional progressive damage constitutive model of composite materials which could consider the strain rate effect. The model is embedded into the Abaqus software by VUMAT subroutine, and the simulation of the projectile penetrating the fiberglass reinforced composite laminates is carried out. The simulation results are compared with the experimental results and the constitutive model simulation results without considering the strain rate effect. The results show that the constitutive model with strain rate established in this paper can accurately simulate the process of projectile penetrating the laminates. Compared with the simulation results without strain rate, the accuracy is increased in the model with strain rate, respectively by 14.1% at the penetration speed of 1.8 m/s and by 22.7% at 3 m/s. The errors, between the simulation results of without strain rate and that of the experiments, are increased with the increase of penetration speed, and increase from 28.7% of 1.8 m/s to 36.9% of 3 m/s. The simulation error of constitutive model with strain rate is relatively stable.

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Constitutive Model of Shape Memory Alloys: One-Dimensional Phase Transformation Model

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.56.84 ◽

2008 ◽

Vol 56 ◽

pp. 84-91

Author(s):

Tadashige Ikeda

Keyword(s):

Phase Transformation ◽

Constitutive Model ◽

Shape Memory Alloys ◽

Strain Rate ◽

Shape Memory ◽

Strain Rate Effect ◽

Rate Effect ◽

Reverse Transformation ◽

Stress Strain ◽

One Dimensional

A simple yet accurate macroscopic constitutive model of shape memory alloys has been developed. The features of this model are (1) energy-based phase transformation criterion, (2) one-dimensional phase transformation rule based on a micromechanical viewpoint, (3) dissipated energy with a form of a sum of two exponential functions, (4) duplication of the strain rate effect, and (5) adaptability to multi-phase transformation. This model is further improved to be able to express stress-strain relationships such that the reverse transformation starts at a higher stress than the martensitic transformation starts. Here, the ideal reversible transformation temperature is empirically described by a function of the martensite volume fraction. In this paper, an outline of our model is given, where the improvement is introduced. Then, it is shown that the model can quantitatively duplicate the major and minor hysteresis loops, strain rate effect, and asymmetry in tension and compression on the stress-strain relationship. And that it can also duplicate the stress-strain relationships having the reverse transformation start stress higher than the forward one.

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A dynamic test methodology for analyzing the strain-rate effect on the longitudinal compressive behavior of fiber-reinforced composites

Composite Structures ◽

10.1016/j.compstruct.2017.08.048 ◽

2017 ◽

Vol 180 ◽

pp. 429-438 ◽

Cited By ~ 19

Author(s):

Marina Ploeckl ◽

Peter Kuhn ◽

Jürgen Grosser ◽

Markus Wolfahrt ◽

Hannes Koerber

Keyword(s):

Strain Rate ◽

Dynamic Test ◽

Strain Rate Effect ◽

Rate Effect ◽

Fiber Reinforced Composites ◽

Reinforced Composites ◽

Fiber Reinforced ◽

Compressive Behavior ◽

Test Methodology

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Stochastic Damage Constitutive Model for Concrete Considering Strain Rate Effect

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.400-402.251 ◽

2008 ◽

Vol 400-402 ◽

pp. 251-256

Author(s):

Xiao Dan Ren ◽

Jie Li

Keyword(s):

Constitutive Model ◽

Strain Rate ◽

Dynamic Loading ◽

Strain Rate Effect ◽

Rate Effect ◽

Constitutive Relationship ◽

Dynamic Increase Factor ◽

Damage Constitutive Model ◽

Dynamic Stochastic ◽

Stochastic Damage

The present work concentrates on the model of concrete under dynamic loading. The stochastic damage constitutive model for concrete under static loading developed by the authors’ research group is firstly reviewed in this paper. The strain rate effect is considered as viscous effect so that the dynamic generalization of the static model could be developed by analogy with viscous-plastic theory. Combined with static damage expressions, the frame work of dynamic stochastic damage constitutive relationship for concrete is established. The analytical expression of dynamic increase factor (DIF) of peak stresses under tension and compression are derived according to the present dynamic damage model. Several simulation results of concrete under static as well as dynamic loading are provided to demonstrate its capacity of reproducing the salient features experimentally observed.

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Dynamic out-of-plane compressive failure mechanism of C/C composite: Strain rate effect on the defect propagation and microstructure failure

Journal of Engineering Materials and Technology ◽

10.1115/1.4050889 ◽

2021 ◽

pp. 1-31

Author(s):

Fei Guo ◽

Qingguo Fei ◽

Yanbin Li ◽

Nikhil Gupta

Keyword(s):

Constitutive Model ◽

Strain Rate ◽

Failure Mechanism ◽

Maximum Stress ◽

Testing Machine ◽

Strain Rate Effect ◽

Rate Effect ◽

Compressive Failure ◽

Macro Scale ◽

Out Of Plane

Abstract Out-of-plane compression experiments with the strain rate from 0.0001/s to 1000/s are performed on 3D fine weave pierced Carbon/Carbon (C/C) composite using a universal testing machine, a high-speed testing machine, and a split Hopkinson pressure bar (SHPB). The compressive failure mechanism of the composite is analyzed by multi-scale analysis method, which ranges from micro-scale defect propagation, through meso-scale microstructure failure, to macro-scale material failure. In order to predict the out-of-plane compressive properties of 3D fine weave pierced C/C composite at different strain rates, a strain-rate-dependent compressive constitutive model is proposed. The results show that the out-of-plane compressive behavior of the 3D fine weave pierced C/C composite is sensitive to strain rate. With increasing the strain rate, the initial compressive modulus, the maximum stress and the strain at the maximum stress increase. The difference in mechanical behavior between quasi-static and high strain rate compression is owing to the strain rate effect on the defect propagation of the 3D fine weave pierced C/C composite. The proposed constitutive model matches well with the experimental data.

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