Crack paths at multiple-crack systems in anisotropic structures: simulation and experiment

被引：6

作者：

Judt, Paul O. ^{[1
]}

Ricoeur, Andreas ^{[1
]}

Linek, Guenter ^{[1
]}

机构：

[1] Univ Kassel, Inst Mech, Dept Engn Mech, D-34125 Kassel, Germany

来源：

20TH EUROPEAN CONFERENCE ON FRACTURE | 2014年 / 3卷

关键词：

crack growth; anisotropy; J-integral; interaction integral; curved cracks; MIXED-MODE CONDITIONS; PROPAGATION;

D O I：

10.1016/j.mspro.2014.06.343

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This paper is targeted on numerical methods for accurate crack tip loading analysis and crack path prediction. Those are based on finite element calculations of the boundary value problem. Applying path-independent integrals to curved cracks in order to accurately calculate the J-integral, energy release rate (ERR) or stress intensity factors (SIF) is still not state of the art. Contours which are not confined to the crack tip require special analytical preparation and numerical treatment to supply results which are sufficiently precise for reliable crack path prediction. Methods to improve the calculation of the J-integral and the interaction integral (I-integral)are presented. In particular, the latter has never been applied to strongly curved cracks. Also, efficient methods for the loading analysis and crack growth simulation of multiple interacting cracks based on path-independent integrals are presented. The anisotropy of fracture toughness is taken into account being a crucial part of the numerical model. Experiments are carried out with specimens made of aluminum alloy Al-7075, comparing subcritically grown cracks with simulations. (C) 2014 Elsevier Ltd.

引用

页码：2122 / 2127

页数：6

共 13 条

[1]

BUDIANSKY B, 1973, J APPL MECH-T ASME, V40, P201, DOI 10.1115/1.3422926

[2]

Erdogan F., 1963, J. Fluids Eng. Trans. ASME, V85, P519, DOI DOI 10.1115/1.3656897

[3]

Griffith VI AA, 1921, Royal Soc., V221, P163, DOI [10.1098/rsta.1921.0006, DOI 10.1098/RSTA.1921.0006]

[4]

Hussain M.A., 1974, Proc. of the 1973 Nat. Symp. On fracture mechanics, P2

[5]

Irwin GR., 1957, J Appl Mech, V24, P361, DOI [10.1115/1.4011547, DOI 10.1115/1.4011547]

[6]

Judt P., 2013, ADV FRACT RES P ICF1

[7] Accurate loading analyses of curved cracks under mixed-mode conditions applying the J-integral [J].

Judt, Paul O. ;

Ricoeur, Andreas .

INTERNATIONAL JOURNAL OF FRACTURE, 2013, 182 (01) :53-66

[8]

Kfouri AP, 1996, FATIGUE FRACT ENG M, V19, P27, DOI 10.1111/j.1460-2695.1996.tb00929.x

[9] Efficient finite element simulation of crack propagation using adaptive iterative solvers [J].

Meyer, A ;

Rabold, F ;

Scherzer, M .

COMMUNICATIONS IN NUMERICAL METHODS IN ENGINEERING, 2006, 22 (02) :93-108

[10] Fatigue life and crack path predictions in generic 2D structural components [J].

Miranda, ACO ;

Meggiolaro, MA ;

Castro, JTP ;

Martha, LF ;

Bittencourt, TN .

ENGINEERING FRACTURE MECHANICS, 2003, 70 (10) :1259-1279

← 1 2 →