標準號：BS EN 13234-2006
中文標準名稱：高技術陶瓷.室溫下陶瓷復合材料的機械特性.通過切口靈敏度試驗評定耐裂紋延伸性
英文標準名稱：Advanced technical ceramics - Mechanical properties of ceramic composites at ambient temperature - Evaluation of the resistance to crack propagation by notch sensitivity testing
標準類型：Q32
發布日期：2006/12/29 12:00:00
實施日期：2006/12/29 12:00:00
中國標準分類號：Q32
引用標準：EN 658-1-1998;EN ISO 7500-1;ISO 3611
適用范圍：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.