標準號：BS EN 843-5-2006
中文標準名稱：**工業陶瓷.室溫下單片陶瓷的機械性能.第5部分:統計分析
英文標準名稱：Advanced technical ceramics — Mechanical properties of monolithic ceramics at room temperature — Part 5: Statistical analysis
標準類型：Q32
發布日期：2007/1/31 12:00:00
實施日期：2007/1/31 12:00:00
中國標準分類號：Q32
國際標準分類號：81.060.30
引用標準：EN 843-1-2006;EN ISO/IEC 17025
適用范圍：This part of EN 843 specifies a method for statistical analysis of ceramic strength data in terms of a two-parameter Weibull distribution using a maximum likelihood estimation technique. It assumes that the data set has been obtained from a series of tests under nominally identical conditions.NOTE 1 In principle, Weibull analysis is considered to be strictly valid for the case of linear elastic fracture behaviour tothe point of failure, i.e. for a perfectly brittle material, and under conditions in which strength limiting flaws do not interactand in which there is only a single strength-limiting flaw population.If subcritical crack growth or creep deformation preceding fracture occurs, Weibull analysis can still be applied if the results fit a Weibull distribution, but numerical parameters may change depending on the magnitude of these effects.Since it is impossible to be certain of the degree to which subcritical crack growth or creep deformation has occurred, thisEuropean Standard permits the analysis of the general situation where crack growth or creep may have occurred, provided that it is recognized that the parameters derived from the analysis may not be the same as those derived from data with no subcritical crack growth or creep.NOTE 2 This European Standard employs the same calculation procedures as method A of ISO 20501:2003 [1], but does not provide a method for dealing with censored data (method B of ISO 20501).