A NUMERICAL INVESTIGATION TO THE CONSTITUTIVE BEHAVIOR OF FUNCTIONALLY GRADED MATERIALS AT HIGH HEATING-RATE
The constitutive behavior of aluminum alloy matrix graded composites reinforced with SiC particles subjected to different level of preload stress and heated at high heating-rates is investigated numerically.The particles distribute uniformly in the matrix substrate every layer.A constitutive model for the description of the mechanical behavior of the functionally graded material subject to higher heating-rate or higher heating-rate history is proposed.Numerical examples are provided to show the effects of heating-rate,temperature,and preload on the constitutive behavior of the material.It is shown that,besides the applied preload stress and temperature,heating-rate also plays a significant role in the constitutive behavior and failure of the material.The effects of the preloaded stress,temperature,heating-rate,and the particle volume fraction on the interfacial and local behavior of the material are also investigated,which might be important for the damage and failure analysis of functionally graded materials (FGMs).Since most FGMs are used at elevated temperature and fast heating-rate,this investigation will be of great significance.
Functionally graded composite materials Heating-rate Preload structure Constitutive behavior
H.W.Zheng X.H.Peng
FML,Department of Engineering Mechanics,Chongqing University,Chongqing 400030,China
国际会议
第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)
安徽黄山
英文
1522
2008-06-03（万方平台首次上网日期，不代表论文的发表时间）