The Influence of Grain Size and Grain Size Distribution on Sliding Frictional Contact in Laterally Graded Materials
The sliding frictional contact problem for a laterally graded half-plane has been considered. Two finite element (FE) models, in macro and micro scales have been developed to investigate the effective parameters in contact mechanics of laterally graded materials loaded by flat and triangular rigid stamps. In macro scale model, the laterally graded half-plane is discretized by piecewise homogeneous layers for which the material properties are specified at the centroids by Mori-Tanaka method. In micro scale model, functionally graded material (FGM) structure has been modeled as ideal solid quadrant particles which are spatially distributed in a homogeneous matrix. Boundary conditions and loading is the same in both models. The microstructure has modeled as rearrangement and sizes changing of particles are possible to provide the possibility of crack nucleation investigation in non-singular regions. Analyses and comparison of the results showed that micro and macro scale results are in very good agreement. Also, increasing the grains aspect ratio and using optimum distribution of grains decrease stress distribution roughness on the surface. Therefore, the possibility of surface cracking far from stamps edges decreased.
Graded Materials Micro Scale Grain Size Grain Size Distribution Contact Mechanic
Romik Khajehtourian Saeed Adibnazari Samaneh Tashi
Department of Aerospace Engineering, Sharif University of Technology, Tehran 14646, Iran
国际会议
2011 International Conference on Mechatronics and Applied Mechanics(2011年机电一体化与应用力学国际会议 ICMAM 2011)
香港
英文
964-969
2011-12-27（万方平台首次上网日期，不代表论文的发表时间）