A numerical approximation to the elastic properties of hollow particle filled composites

作者：Liang Xi^*; Li Huijian; Yu Wei; Jiang Xin; Zhang Zunqian

来源：ICIC Express Letters, 2012, 6(6): 1549-1554.

• Differential scheme
• Effective elastic constants
• Effective property
• Elastic properties
• Hollow glass
• Hollow particle
• Microballons
• Numerical approximations
• Particle reinforced
• Particulate composites
• Poisson's ratio
• Polymeric matrices
• Random sequential adsorption
• Representative volume element (RVE)
• RVE
• Similar pattern
• Stress field distribution
• Syntactic foams
• Young's Modulus

Syntactic foams are particulate composites obtained by filling a polymeric matrix with hollow glass microballons (HGMs). RSA (Random Sequential Adsorption) method is often used to generate the representative volume element models of syntactic foams. Through the finite element analysis based on representative volume element models, vie obtained effective elastic constant of syntactic foams and microscopic stress field distribution. Differential scheme is used to validate the effectiveness of numerical approximation results. It was found that wall-thickness ratio of HGM plays a crucial role in the effective Young's modulus. However, the specific Young's modulus of syntactic foams is higher than the neat resin modulus. This property illustrates the super-lightweight superiority of syntactic foams. The calculated Poisson's ratio presents similar pattern. Microscopic stress distribution shows that distributions of stress concentration and stress weakness depend on the HGMs wall-thickness ratio.

• 出版日期2012