Evaluation of fracture strength for ceramics with defects by numerical simulation (2nd report, characteristics of R-curve)

被引：0

作者：

Mori, Kazuya

Noguchi, Hiroshi

机构：

来源：

Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A | 1995年 / 61卷 / 584期

关键词：

Algorithms - Ceramic materials - Computer simulation - Cracks - Defects - Estimation - Fracture mechanics - Geometry - Stress concentration - Stress intensity factors - Stresses;

D O I：

暂无

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学科分类号：

摘要：

The influence of pre-crack length on an R-curve for ceramics with bridging is investigated by numerical simulation. Generally a pre-crack is introduced into the specimen for measurement of the R-curve. However, it is considered that the R-curve is influenced by the pre-crack length because the bridging stress distribution depends on the pre-crack length. In this study, R-curves are obtained by numerical simulation. In the numerical simulation, we establish an algorithm to evaluate the R-curve based on bridging stress. This algorithm can be used to estimate the characteristics of bridging through a certain R-curve obtained experimentally. Based on the results, it is shown that the R-curve for ceramics with bridging depends on the pre-crack length and the specimen geometry.

引用

页码：717 / 721

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