日本機械学会論文集 A編
Online ISSN : 1884-8338
Print ISSN : 0387-5008
環状切欠部に生じた表面き裂の弾・塑性破壊力学的解析とそれに基づく低サイクル疲労寿命評価
幡中 憲治藤満 達朗白石 進
著者情報
ジャーナル フリー

56 巻 (1990) 522 号 p. 295-303

詳細
PDFをダウンロード (949K) 発行機関連絡先
抄録

The elastic-plastic stress analysis was made by the finite element method. The surface crack growth rate, da/dN, was analyzed in terms of the elastic-plastic fracture mechanics parameters of the J-integral range, ΔJ and the strain intensity factor range, ΔKε, which were estimated in association with the stress and strain gradients produced in the cross section of the notched specimen. The low-cycle fatigue life for the crack propagation, Nc, was calculated by combining the cyclic stress-strain curve and the crack growth law expressed by the da/dN vs. ΔJ and da/dN vs. ΔKε relations. The calculation based on the fracture mechanics parameters determined from the stress-strain response at the notch root leads to a shorter life in the more sharply notched specimen under the lower stress condition. Meanwhile, the fracture mechanics parameters associated with the stress and strain gradients in the cross section of the notched specimen give a good estimation of the life prediction.

著者関連情報
© 社団法人日本機械学会
前の記事 次の記事
feedback
Top