精细陶瓷（先进陶瓷 先进技术陶瓷） - 威布尔统计强度数据

[中文适用范围]： 本文件涵盖了单轴强度数据的报告以及以脆性方式失效的先进陶瓷的概率分布参数的估计。 先进陶瓷的失效强度被视为连续随机变量。 通常，许多具有明确几何形状的测试样本在明确的等温加载条件下会失效。 记录每个样本失效时的负载。 产生的失效应力用于获得与基础总体分布相关的参数估计。 本文档仅限于假设失效强度的分布是具有尺寸缩放的二参数威布尔分布。 此外，本文件仅限于主要承受单轴应力状态的测试样本（拉伸、弯曲、加压环等）。 第 6.4 和 6.5 节概述了校正估计的威布尔参数中的偏差误差的方法，以及计算来自数据集的估计值的置信界限的方法，其中所有故障均源自单个缺陷群（即单个故障模式）。 在失效源自多个独立缺陷群（例如竞争失效模式）的样本中，6.4 和 6.5 中概述的偏差校正和置信界限方法不适用。 [外文原描述]： This document covers the reporting of uniaxial strength data and the estimation of probability distribution parameters for advanced ceramics which fail in a brittle fashion. The failure strength of advanced ceramics is treated as a continuous random variable. Typically, a number of test specimens with well-defined geometry are brought to failure under well-defined isothermal loading conditions. The load at which each specimen fails is recorded. The resulting failure stresses are used to obtain parameter estimates associated with the underlying population distribution. This document is restricted to the assumption that the distribution underlying the failure strengths is the two-parameter Weibull distribution with size scaling. Furthermore, this document is restricted to test specimens (tensile, flexural, pressurized ring, etc.) that are primarily subjected to uniaxial stress states. Subclauses 6.4 and 6.5 outline methods of correcting for bias errors in the estimated Weibull parameters, and to calculate confidence bounds on those estimates from data sets where all failures originate from a single flaw population (i.e. a single failure mode). In samples where failures originate from multiple independent flaw populations (e.g. competing failure modes), the methods outlined in 6.4 and 6.5 for bias correction and confidence bounds are not applicable.