Statistical Evolution of Microvoids in Particle-Filled Polymers under Plate Impact

Abstract

Statistical evolution of microvoids in a particle-filled polymer under plate impact is theoretically studied. Based on the constitutive equations of the material recently obtained by the authors, the velocity of the propagation of one-dimensional strain wave caused by the plate impact is analyzed, and the evolution of the microdamage is calculated. It is shown that the microvoid evolution is influenced by several factors, such as particle size-dispersity, average radius of particles, and the adhesive energy of the interface. The numerical results show that there is a sensitive crest of the impact velocity for microvoid evolution. If the impact velocity reaches the critical value corresponding to the peak value of the crest, the microvoids accumulation will increase rapidly, and it may lead to the dynamic failure of the material.

The Effect of the Property of Non-Linear Viscosity on the Interfacial Debonding of Particulate-Reinforced Polymers

“…Recently, more attentions are paid to the study of the toughness, the constitutive models, and the mechanism of dynamic failure of the materials by many researchers [1][2][3][4]. It is found that the evolution of microvoids (nucleation, growth and eventually coalescence of microvoids) is the main mechanism of failure of the materials [5][6]. Because the nucleation of microvoids is induced by the interfacial debonding between particles and the matrix of materials, the effects of external influences, the properties of matrix, and the shape and size of the particles on the interfacial debonding should be studied carefully.…”