陶瓷是脆性材料,因此,材料和制品的表面或内部存在的微小缺陷(最弱的部分)会形成断裂的起点并使裂纹扩展。其强度受材料内部最弱部分的支配,所以呈现随威布尔分布的强度分布,强度偏差大。另外,由于没有塑性变形,韧性大都是随强度上升而上升。 对此,经如下处理便可理解。对裂纹材料的强度评价适合运用线性断裂力学,半无 Ceramics are brittle materials, so tiny imperfections (the weakest parts) present on the surface or inside the material and the product form the starting point of the fracture and cause the crack to spread. Its strength is dominated by the weakest part of the material, so the intensity distribution with Weibull distribution, the intensity deviation. In addition, since there is no plastic deformation, the toughness mostly increases with the intensity. In this regard, the following treatment will be understandable. The evaluation of the strength of the cracked material is suitable for the use of linear fracture mechanics, semi-free