コンパクト試験片の破面粗さおよび酸化物誘起き裂閉口の有限要素解析

概要

論文の詳細を見る
The role of crack surface roughness and oxide debris on crack growth characteristics was examined by finite element method for a compact specimen. Several asperities were attached on the crack surfaces. The analysis shows the influence of rigidty and strength of the asperities, asperity length, asperity thickness and the distance from the crack tip. The results were interpreted in termes of the opening stress intensity K_<op> and the effective CTOD, Δσ_o^*. It is concluded that the strength of asperities has a marked influence on K_<op>. On the other hand, rigidty is a controlling factor of Δσ_o^*. The analysis also gives a support to resolve the uncertainty concerning the experimental determination of K_<op> using back face strain technique.
社団法人日本機械学会の論文
1985-01-25