Abstract
The industrial grade hollow beads were divided into three particle sizes of 40 mesh, 60 mesh and 80 mesh and added into the epoxy resin material matrix to prepare porous foam composites. The quasi-static compression experiments were performed on porous foam composites at room temperature, and the stress-strain curves of quasi-static compression processes were analyzed separately for different particle sizes. According to the characteristics of the compression curve of porous foam materials, the representative characteristic parameters of each stage are extracted separately. The fracture characteristics of the microscopic samples of the compressed material specimens were observed by electron microscopy, and the deformation patterns of the composite materials were analyzed. And combined with SEM pictures to analyze the form of microbead crushing and matrix pore collapse mode, according to which the particle size suitable for this matrix is 60 mesh and the mass fraction of microbeads is 10%.
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