An Improved Method to Calculate the Direction and Weight in Microplane Constitutive Model
This paper analyzes the calculation method on microplane direction and weight in current literature based on introducing numerical discretization algorithm in the microplane model.The characteristics and disadvantages of current methods are given out.In response to the issue that the orientation ofmicroplane is not enough uniform and the shape and physical meaning of microplane is not clear,it is given out a kind of method that carrying out projection on the spherical surface after dividing the surface grid of regular polyhedron to calculate the orientation of microplane,then using the knowledge of spherical geometry to calculate the weight of microplane.Comparing and selecting the dividing scheme of microplane that obtained by different regular polyhedron and the grid levels,the optimization objective of fitting macroscopic elastic stiffness matrix is given out.The calculation results indicate that the method provided in this paper can obtain the dividing scheme that the shape and size of microplane are fully uniform,and the calculation result is more accurate than the optimal solution in the literature.
microplane constitutive model orientation weight numerical discrete spherical geometry
Mingxiao Jia Zujun Liu Wei Xie
North China University of Water Resources and Electric Power, Zhengzhou 450011, China
国际会议
郑州
英文
121-128
2012-09-22（万方平台首次上网日期，不代表论文的发表时间）