Abstract
Three-dimensionally reinforced porous composites (skeletonized 3D composites; 3DSCMs) were fabricated by use of a rod piercing method. The aim to introduce the porosity in 3DSCMs is to reduce the weight and the thermal expansion of the material with minimum reduction of the strength. In this paper, the compressive strength and the interfacial shearing strength of 3DSCMs were evaluated and the following conclusions were obtained. 1) The ultimate strength of 3DSCMs took almost the same value as that of the 3D composites without porosity, even if the volume fraction of the pores was very high. 2) Energy absorption during the compressive test to the 45°direction from the reinforcing axes was much higher compared with the ordinary laminate composites. 3) Interfacial strength was remarkably improved by application of surface sanding or primer treatment to the reinforcing rod.
