1 0 0 0 OA 有限要素法による三次元応力拡大係数の一計算法
- 著者
- 高木 豊 和田 均
- 出版者
- 大同工業大学
- 雑誌
- 大同工業大学紀要 (ISSN:02855372)
- 巻号頁・発行日
- vol.17, pp.3-8, 1981-11
The present authors have recently proposed a new method for obtaining the stress-intensity factors for the opening and the sliding mode cracks in two-dimensional problems. The same method has now been extended to the calculation of the stress-intensity factors for the opening mode crack in three-dimensional problems. The validity of the method has been examined for a number of cylindrical bars with internal circular cracks of various radii and the results have always turned out to be fairly satisfactory. In addition, for further examples, the effects of the specimen length and the thickness on the variations of the stress-intensity factors across the thickness of center-crack tension specimens have been investigated. These results are compared with other stress-intensity factors available in the existing literatures.
1 0 0 0 き裂を持つラグの静的および動的応力拡大係数
- 著者
- 和田 均 安藤 善司 西村 融
- 出版者
- 一般社団法人日本機械学会
- 雑誌
- 日本機械学會論文集. A編 (ISSN:03875008)
- 巻号頁・発行日
- vol.52, no.482, pp.2416-2421, 1986-10-25
A simple procedure for obtaining a stress intensity factor using FEM proposed by the authors was applied to analyze the problem of a lug with cracks. First, to confirm its usefulness for the present method, a problem for a rectangular plate with an edge crack subjected to three point bending was calculated by the present method. The present results were compared with present photoelastic experimental results or usual results. Next, a dynamic calculation for the same problem and a problem for a lug with cracks were carried out by the present method, and the results were compared with the present experimental results using a strain gaga method. Consequently, as the usefulness of the present method was recognized, the static and the dynamic stress intensity factor of the lug with cracks was investigated by the present method varying a pin hole diameter or a crack length systematically. Furthermore, the relation between the static stress intensity factor and the dynamic one was presented.