Abstract：Syntactic foams are particulate composites obtained by filling a polymeric matrix with hollow glass microballons (HGMs). RSA (Random Sequential Adsorption) method was used to generate the representative volume element models of syntactic foams. Through the finite element analysis, the stress-strain relationship of each type of syntactic foams was obtained. Material properties of syntactic foams were simplified to bilinear kinematic hardening model. The effects of HGM filling ratio and wall-thickness to the elastic constants and yield stress of syntactic foams were analyzed. Results show that wall-thickness ratio of HGM plays a crucial role in the effective Young’s modulus and yield stress. The higher specific modulus and specific strength characterize the good performances of syntactic foams. Distributions of stress and plastic strain depend on the HGMs wall-thickness also.
2013, Vol. 34 
