Abstract：It is difficult to determine the initial density distribution of design domain and take the optimization algorithm convergenced when designing material with specified performance using the method of inversed homogenization. Crystallon can usually be used to accelerate the growth of crystal when making cultured crystal. Suggested from this physical process, a new method called crystal nucleus method used to determine the initial density distribution was proposed. After discribed the conception of crystal nucleus method, some issues about this method were discussed. These issues included how to determine the value of power exponent in SIMP model, how to select the filtering domain, the influences of the position of crystal nucleus and the type of object function to the optimal microstructrure of material with specified performance. Several examples of material design with described and extreme performances showed the effectiveness of crystal nucleus method.
2010, Vol. 31 
