非連続き裂モデルに関する基礎的検討 : 一般的構成方程式とき裂パラメータ評価
1987 年 53 巻 488 号 p. 786-794
詳細
1987 年 53 巻 488 号 p. 786-794
The discontinuous crack model is model in which the discontinuities around a crack tip are taking into consideration as the first-order approximation and which can be thought of as the most generalized model of the Dugdale's. In this paper, fundamental investigations are made to let this model be a match for usual continuum crack model in its generality and applicability. The contents are as follows : (1) A general method to give the constitutive equation for the plane considering a discontinuity that conforms to a continuum without any contradiction is shown by introducing a strain-like quantity. (2) Finite element formulation for the discontinuous plane is shown by using plane elements. (3) Finite element analyses of an elastic-plastic crack and an elastic-creep crack are carried out, and the applicability of the model is discussed through the evaluations of crack parameters.
