BS EN 13234-2006 高技术陶瓷.室温下陶瓷复合材料的机械特性.通过切口灵敏度试验评定耐裂纹延伸性

标准号：BS EN 13234-2006
中文标准名称：高技术陶瓷.室温下陶瓷复合材料的机械特性.通过切口灵敏度试验评定耐裂纹延伸性
英文标准名称：Advanced technical ceramics - Mechanical properties of ceramic composites at ambient temperature - Evaluation of the resistance to crack propagation by notch sensitivity testing
标准类型：Q32
发布日期：2006/12/29 12:00:00
实施日期：2006/12/29 12:00:00
中国标准分类号：Q32
引用标准：EN 658-1-1998;EN ISO 7500-1;ISO 3611
适用范围：This European Standard describes a method for the classification of ceramic matrix composite (CMC) materials with respect to their sensitivity to crack propagation using tensile tests on notched specimens with different notch depths. Two classes of ceramic matrix composite materials can be distinguished: materials whose strength is sensitive to the presence of notches and materials whose strength is not affected. For sensitive materials, this European Standard defines a method for determining equivalent fracture toughness.The parameter, Keq, is defined as the fracture toughness of a homogeneous material which presents the same sensitivity to crack propagation as the ceramic matrix composite material which is being considered. The definition of the Keq parameter offers the possibility to compare ceramic matrix composite materials with other materials with respect to sensitivity to crack propagation.For notch insensitive materials, the concept of Keq does not apply.This European Standard applies to all ceramic matrix composites with a continuous fibre reinforcement, unidirectional (1 D), bidirectional (2 D), and tridirectional (x D, where 2 < x ≤ 3), loadedalong one principal axis of reinforcement.