疲労破面の X 線フラクトグラフィ

概要

論文の詳細を見る
X-ray fractography is a technique to analyze the cause of the fracture by the information obtained by irradiating X-ray on the fractured surface. The information used are usually the residual stress or full width at half maximum (or half value breadth). This technique was originated and developed mainly in Japan, and now is used in various countries in the world. The maximum stress intensity factor K_<max> at the fracture can be estimated from the plastic zone depth calculated from the residual stress or half value breadth distribution under the fractured surface. However, estimation method for stress intensity factor range ⊿K which is the most important fracture mechanics parameter is not established so far. If ⊿K is estimated, the applied stress amplitudes, fatigue crack propagation rates and fatigue crack propagation lives can be estimated. In this paper, the estimation method for ⊿K is proposed. Also, the effect of material characteristics on the estimation and the mechanism of residual stress development in the fracture is explained based on the experimental results.
湘南工科大学の論文
1996-03-25