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Strain-Rate-Dependent Mechanical Behavior and Blast Response of T800 Plain-Weave CFRP
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DOI：10.1016/j.dt.2026.07.020.png)
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Abstract
En 中文
Plain-weave carbon fiber-reinforced polymer (PWCFRP) composites have attracted considerable attention in the field of blast protection. To predict the mechanical behavior of T800 PWCFRP rate-sensitive composite structures under blast loading, a series of tensile, compressive, and shear tests were conducted over strain rates ranging from quasi-static (10-4 s-1) to dynamic (102–104 s-1). Based on the mechanical parameters obtained at different loading rates, nonlinear fitting relationships between elastic modulus, strength, and strain rate were established. These rate-dependent relationships were then incorporated into the elastic constitutive model and the three-dimensional Hashin failure criterion. Together with an exponential damage evolution law, a user material subroutine (VUMAT) was developed and embedded in ABAQUS/Explicit for numerical solution. Subsequently, bench-scale blast tests and numerical simulations of CFRP-steel plate composite structures were carried out. The results show that PWCFRP exhibits significant tension-compression asymmetry, shear nonlinearity, anisotropy, and strain rate dependence. Under blast loading, the PWCFRP-steel composite structure displays a complex damage mode characterized by tensile-shear coupled failure. The numerically predicted final plastic deformation is in excellent agreement with the experimental results (error < 3.2%), and the simulated damage modes are consistent with post-experimental observations. The established rate-dependent constitutive model can effectively predict the dynamic response and damage evolution of T800 PWCFRP under blast loading, thereby providing support for the design of protective structures.
Keywords:
Plain-weave carbon fiber-reinforced polymer
Strain-rate effect
Rate-dependent constitutive model
Composite protective structures
Blast loading
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