作者: K OGI , N TAKEDA , K. M PREWO
关键词: Acoustic microscopy 、 Thermal shock 、 Materials science 、 Fracture (geology) 、 Composite material 、 Cracking 、 Acoustic emission 、 Ultimate tensile strength 、 Tensile testing 、 Borosilicate glass
摘要: Fracture mechanisms of discontinuous carbon-fibre-reinforced glass matrix composites were experimentally studied for specimens with initial damage induced by thermal shock. First, cracking due to shock was observed using both optical microscopy and scanning acoustic (SAM) reveal the state. Secondly, tensile stress-strain behaviour emission during tests measured without The progress microscopic loading also investigated replica in-situ SAM techniques. Finally, macroscopic transient stresses calculated finite-element analysis. It is proved that fracture process composite specimen thermal-shock-induced cracks different from virgin specimen. This difference in processes attributed evolution cracking, which affected pre-existing microcracks matrix.