使用FEPG(F in ite E lem ent Program Generator)软件编程,对维氏压头的微硬度实验进行模拟,建立了一种针对膜基体系有限元计算的新模型,该模型考虑了边界摩擦和实时跟踪接触因素,在对S i片和TiN单层膜压痕的模拟分析后,得出“载荷-压...使用FEPG(F in ite E lem ent Program Generator)软件编程,对维氏压头的微硬度实验进行模拟,建立了一种针对膜基体系有限元计算的新模型,该模型考虑了边界摩擦和实时跟踪接触因素,在对S i片和TiN单层膜压痕的模拟分析后,得出“载荷-压痕对角线关系曲线”,与其它文献中的实验结果相吻合。说明模型是合理的,结果是可靠的,对实际应用具有指导意义,并为理论分析提供了研究方法。展开更多
Parallel computation programs are developed for three-dimensional meso-mechanics analysis of fully-graded dam concrete and seismic response analysis of high arch dams （ADs）, based on the Parallel Finite Element Prog...Parallel computation programs are developed for three-dimensional meso-mechanics analysis of fully-graded dam concrete and seismic response analysis of high arch dams （ADs）, based on the Parallel Finite Element Program Generator （PFEPG）. The computational algorithms of the numerical simulation of the meso-structure of concrete specimens were studied. Taking into account damage evolution, static preload, strain rate effect, and the heterogeneity of the meso-structure of dam concrete, the fracture processes of damage evolution and configuration of the cracks can be directly simulated. In the seismic response analysis of ADs, all the following factors are involved, such as the nonlinear contact due to the opening and slipping of the contraction joints, energy dispersion of the far-field foundation, dynamic interactions of the dam-foundation- reservoir system, and the combining effects of seismic action with all static loads. The correctness, reliability and efficiency of the two parallel computational programs are verified with practical illustrations.展开更多
文摘使用FEPG(F in ite E lem ent Program Generator)软件编程,对维氏压头的微硬度实验进行模拟,建立了一种针对膜基体系有限元计算的新模型,该模型考虑了边界摩擦和实时跟踪接触因素,在对S i片和TiN单层膜压痕的模拟分析后,得出“载荷-压痕对角线关系曲线”,与其它文献中的实验结果相吻合。说明模型是合理的,结果是可靠的,对实际应用具有指导意义,并为理论分析提供了研究方法。
基金National Natural Science Foundation of China Under Grant No.90510017
文摘Parallel computation programs are developed for three-dimensional meso-mechanics analysis of fully-graded dam concrete and seismic response analysis of high arch dams （ADs）, based on the Parallel Finite Element Program Generator （PFEPG）. The computational algorithms of the numerical simulation of the meso-structure of concrete specimens were studied. Taking into account damage evolution, static preload, strain rate effect, and the heterogeneity of the meso-structure of dam concrete, the fracture processes of damage evolution and configuration of the cracks can be directly simulated. In the seismic response analysis of ADs, all the following factors are involved, such as the nonlinear contact due to the opening and slipping of the contraction joints, energy dispersion of the far-field foundation, dynamic interactions of the dam-foundation- reservoir system, and the combining effects of seismic action with all static loads. The correctness, reliability and efficiency of the two parallel computational programs are verified with practical illustrations.
