摘要
采用实验方法研究聚乙烯(PE)管道在机械载荷条件下的应力松弛行为,通过卷积分解析法和基于Maxwell模型的有限单元数值模拟法对其进行验证。结果表明,在小应变下采用Boltzmann叠加原理推导出的PE黏弹性本构模型可用于预测PE管道的应力松弛行为;基于实验参数,利用有限单元法能有效地对PE的黏弹性行为进行预测。
Laboratory tests were performed to investigate the time-dependent stress behavior of polyethylene（PE） pipes under mechanical loading conditions. Analytical methods using convolution integrals and numerical modeling using finite elements were employed to model stress relaxation behavior. It showed that under small strain, the new PE viscoelasticity constitutive model which using Boltzmann superposition principle could be used to predict the relaxation behavior of PE pipe. With the support of material parameters, using the finite element method could effectively analyze the viscoelastic behavior of PE material.
出处
《中国塑料》
CAS
CSCD
北大核心
2016年第4期93-98,共6页
China Plastics
关键词
聚乙烯
管材
应力松弛
黏弹性
有限单元法
polyethylene
pipe
stress relaxation
viscoelasticity
finite element method
