剪切增稠液浸渍凯夫拉织物的动态本构模型

叶义晨; 文鹤鸣

doi:10.11858/gywlxb.20240968

剪切增稠液浸渍凯夫拉织物的动态本构模型

doi: 10.11858/gywlxb.20240968

叶义晨,
文鹤鸣^,

中国科学技术大学中国科学院材料力学行为和设计重点实验室，安徽合肥 230026, 中国

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出版历程
- 网络出版日期: 2025-03-17

A Dynamic Constitutive Model for Shear Thickening Fluid Impregnated Kevlar Fabric

YE Yichen,
WEN Heming^,

摘要

摘要: 剪切增稠液（Shear Thickening Fluid, STF）浸渍凯夫拉（Kevlar）织物是一种新型复合材料，与纯Kevlar织物相比，具有更好的抗冲击性能，研究其动态本构模型具有重要的理论意义和应用价值。首先，通过引入动态增强因子（应变率效应）和残余强度因子，结合STF的流变特性与纱线拔出实验结果，发展了STF浸渍Kevlar织物的连续介质损伤力学本构模型；然后，利用提出的本构模型，开展了不同冲击速度下STF浸渍Kevlar织物侵彻的数值模拟；最后，将模拟结果与文献中的相关实验结果进行对比分析。结果表明：所建立的本构模型能够预测STF浸渍Kevlar织物在冲击载荷作用下的力学响应和破坏形貌，并且能够描述STF浸渍后Kevlar织物抗冲击性能的增强效应。
- 剪切增稠液 /
- Kevlar织物 /
- 连续介质损伤力学本构模型 /
- 流变特性 /
- 纱线间摩擦
Abstract: Shear thickening Fluid (STF) impregnated Kevlar fabric is a new type of composite materials which has better impact resistance as compared with neat Kevlar fabric. On the basis of previous work, a dynamic constitutive model for STF impregnated Kevlar fabric is firstly developed by introducing dynamic increase factor (strain rate effect) and residual strength factor in combination with the rheological properties of STF and yarn pull out test results. Numerical simulations of STF impregnated Kevlar fabric at different impact velocities are then conducted using the proposed constitutive model. Finally, the numerical results are compared with the relevant experimental data. It is shown that the present constitutive model can predict well the impact response of STF impregnated Kevlar fabrics in terms of residual velocity, load-displacement curve and damage morphology, lending support to the accuracy and usefulness of the dynamic constitutive model for STF impregnated Kevlar fabric.
- shear thickening fluid /
- Kevlar fabric /
- continuum damage mechanical constitutive model /
- rheological properties /
- inter-yarn friction