碳纤维增强聚醚醚酮材料动态冲击数值模拟
Numerical simulation of dynamic impact of carbon fiber reinforced PEEK material
唐方红 1文周2
作者信息
- 1. 东莞职业技术学院,广东东莞 523808
- 2. 东莞职业技术学院,广东东莞 523808;西安科技大学机械学院,西安 710021
- 折叠
摘要
为探究不同含量碳纤维(CF)增强聚醚醚酮(PEEK)复合材料在动态冲击载荷下的力学性能,采用了有限元软件ABAQUS基于VUMAT子程序开发一个渐进损伤模型,并结合Johnson-Cook材料模型用以模拟材料高应变率响应.通过Matlab编程,构建了四种不同CF体积分数(0%,10%,20%,30%)复合材料模型,并对其进行动态冲击加载模拟.模拟结果表明,随着CF含量的增加,复合材料在冲击载荷下的应力-应变分布得到了显著改善.具体来说,CF有效限制了冲击区域的应力集中,降低了材料的损伤程度.此外,含CF的复合材料展现出更高的等效塑性应变和极限载荷,这表明材料的强度和刚度得到了增强,从而提高了其抵抗冲击的能力.分析表明,CF增强PEEK降低了复合材料在冲击过程中的刚度退化,这有助于提高材料的能量吸收效率,减少冲击失效的可能性.证实了CF对于改善PEEK基复合材料冲击性能的积极作用,并且随着CF含量的增加,材料冲击失效风险得到了有效降低.
Abstract
Focusing on evaluating the mechanical properties of polyetherketone(PEEK)composites reinforced with varying levels of carbon fiber(CF)when subjected to dynamic impact loading.To accomplish this,a progressive damage model utilizing the VUMAT subroutine within the ABAQUS finite element analysis software was developed.This model was coupled with the Johnson-Cook material constitutive model to accurately simulate the material's behavior under high strain rate conditions.Utilizing Matlab,four composite models were designed with distinct CF volume fractions:0%,10%,20%,and 30%.These models were subjected to simulated dynamic impact events to assess their structural integrity and response.The simulations revealed that the stress-strain distribution within the composite material significantly improved with increasing CF content.Notably,the incorporation of CF effec-tively mitigate material damage and localize stress concentrations at the impact site.The composites with CF exhibit higher ultimate loads and plastic stresses,signifying a marked enhancement in material stiffness and strength.This translates to an augmented capac-ity to withstand impact forces.The analysis indicate that the reinforcement of PEEK with CF result in reduced stiffness degradation during impact,thereby increasing the material's energy absorption capabilities and diminishing the probability of impact-induced failure.In summary,the findings of this study corroborate the positive influence of CF on the impact resistance of PEEK-based composites.It is evident that increasing CF content significantly reduces the risk of failure under dynamic impact conditions.
关键词
碳纤维增强聚醚醚酮/碳纤维含量/动态冲击/数值模拟/冲击损伤Key words
carbon fiber reinforced polyetheretherketone/carbon fiber proportion/dynamic impact/numerical simula-tion/impact damage引用本文复制引用
基金项目
广东省教育厅产教融合创新平台项目(2020)(2020CJPT019)
东莞市科技局社会发展项目(2022)(20221800900472)
出版年
2024
NETL
NSTL
万方数据