摘要
基于损伤力学理论,开展了有机玻璃(PMMA)单向拉伸非线性力学特性实验研究,并提出一种能够描述有机玻璃应变率相关与粘弹性损伤行为的改进Maxwell本构模型。在22℃室温条件下开展四种应变率的单向拉伸实验,并通过实验结果拟合模型参数,得到了模型参数随应变率变化的非线性关系。通过对比模型预测结果和试验结果,验证改进了Maxwell本构模型的有效性和合理性。
Based on damage mechanics, the nonlinear mechanical characteristic of Polymethylmethacrylate(PMMA) under uniaxial tension was experimentally researched, and a modified Maxwell model was proposed to describe the stain rate dependence and viscoelastic-damage behavior of PMMA. At the room temperature of 22℃, uniaxial tensile tests were conducted at four strain rates. The nonlinear relationships between the Maxwell modal parameters and strain rate were obtained by fitting the experimental data. Finally, the proposed model was validated by comparing the model predictions with the experimental results.
作者
曾国伟
刘浩轩
申国家
吴亮
ZENG Guowei;LIU Haoxuan;SHEN Guojia;WU Liang(Department of Mechanics,Hubei Province Key Laboratory of Systems Science in Metallurgical Process,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2019年第5期801-804,827,共5页
Journal of Materials Science and Engineering
基金
国家自然科学基金资助项目(11602178)
湖北省自然科学基金资助项目(2015CFB205)
