Influence of inclusion defects on bending properties and failure modes of composites

Abstract

Abstract A comparison test was carried out between the simulated inclusion sample and the normal sample, and the test section was subjected to pure bending loading by three-point bending loading method. The influence of different inclusion positions on the bending mechanical properties of the composite was analyzed. The fracture surface of the specimen was observed macroscopically and by scanning electron microscopy, and the load transfer and failure mechanism of the specimen were studied from macroscopically and microscopically. The results show that the distance of the simulated inclusions and the position of loading surface have great influence on the bending properties of the composites. When the simulated inclusion is far from the loading surface, delamination cracking does not occur in the simulated inclusion area, and the bending property of the simulated inclusion sample is improved rather than decreased, that is, the presence of inclusion does not necessarily reduce the bending property of the composite.