Effects of strain rate and density on tensile behavior of polypropylene syntactic foam with polymer microballoons
Effects of strain rate and density on tensile behavior of polypropylene syntactic foam with polymer microballoons
复制标题
应变速率和密度对聚合物微球聚丙烯复合泡沫塑料拉伸行为的影响
DOI：
10.1016/j.msea.2007.05.028
复制
发表时间：
2008
期刊：
影响因子：
6.4
通讯作者：
K. Kishimoto
中科院分区：
文献类型：
--
作者：
H. Mae;M. Omiya;K. Kishimoto
目的是表征局部应变速率和密度对中、高应变速率下热塑性复合泡沫塑料力学性能的影响。拉伸试验在10 - 1至102 s-1的标称应变率下进行。对微观结构模型进行有限元分析，以估计局部应变率。当考虑局部应变率时，相对弹性模量按名义应变率小于10和大于50 s-1分为两组。这是因为单元边缘处的基体材料是橡胶相，导致在低于10 s-1的标称应变速率下的小的局部弯曲刚度。在名义应变速率大于50 s-1时，相对弹性模量符合吉布森和阿什比公式，而相对屈服应力则归为一组，符合吉布森和阿什比定律。
The objective is to characterize the effects of local strain rate and density on the mechanical properties of the thermoplastic syntactic foams at the intermediate and high strain rates. Tensile tests are conducted at the nominal strain rates from 10−1to 102s−1. Finite element analyses are conducted on the microstructural models to estimate the local strain rate. When the local strain rates are considered, the relative elastic moduli are classified into two groups by the nominal strain rates below 10 and above 50s−1. This is because the matrix material at the cell edge is rubber phase leading to small local bending stiffness at the nominal strain rate below 10s−1. At the nominal strain rate above 50s−1, the relative elastic moduli can follow the equation proposed by Gibson and Ashby, while the relative yield stress is plotted in one group, leading to follow Gibson and Ashby law.