摘要
根据试验所得的某型柴油机RuT300铸铁气缸盖的细观孔洞缺陷照片,利用编译的PYTHON程序实现了含有贴近实际形貌及随机分布孔洞的RVE参数化建模,结合FORTRAN子程序组实现RVE与宏观有限元模型间的数据传递。针对含不同细观孔洞体积分数的工字型试件,在单轴拉伸加载条件下进行了线弹性和弹塑性力学的仿真分析及试验分析,通过结果对比验证了多尺度参数化计算模型的准确性,为进一步的相关动力设计提供了量化参考。
Based on the photographs of the microscopic void defects existing in the cylinder head which was made of RuT300 cast iron,RVE models containing with various voids which were close to reality had been generated by PYTHON coding.By using FORTRAN code,a set of subroutines were established to realize the function of data transfer between RVE and macroscopic finite element model.Uniaxial tension experiments and simulations were respectively applied on the specimens who had different micro-void fractions,and then linear elastic and elastoplastic results were obtained.Accuracy was verified by comparing the results of relevant experiments and simulations,and the claimed method in this paper could provide quantification reference for the engine design.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2017年第1期110-113,152,共5页
Journal of Materials Science and Engineering
基金
国家留学基金委资助项目(201306030010)
国家自然科学基金资助项目(104010205)
