Crack deflection and crack paths in anisotropic aluminum alloy AA7010-T7452: Uncertainties and stochastic aspects

被引：0

作者：

Ricoeur, A. ^{[1
]}

Zarjov, K. ^{[1
]}

Paysan, F. ^{[2
]}

Witulski, T. ^{[3
]}

Breitbarth, E. ^{[2
]}

机构：

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

[2] Deutsch Zentrum Luft & Raumfahrt eV, D-51147 Cologne, Germany

[3] Otto Fuchs KG, D-58540 Meinerzhagen, Germany

来源：

ENGINEERING FRACTURE MECHANICS | 2024年 / 312卷

关键词：

Anisotropic fracture toughness; Crack deflection; J-integral criterion; Bifurcation; Finite elements; CONSERVATION-LAWS; FATIGUE; GROWTH; PROPAGATION; BEHAVIOR; PREDICTION; RESISTANCE; TOUGHNESS;

D O I：

10.1016/j.engfracmech.2024.110626

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Crack paths in CT-specimens are investigated for AA7010-T7452 aluminum alloy. Two quenching temperatures effectuate different degrees of anisotropy of fracture toughness, having a crucial impact on crack deflection under initial mode-I loading. To incorporate the angular characteristic of crack growth resistance into FE simulations, eleven values of the fracture toughness have been recorded. It is found by stochastic and deterministic simulations, as well as by analytical derivations, that crack paths may be sensitive to the angular distribution of toughness and slight deviations from supposed crack orientation angles, partly leading to crack path instability. Peculiarities of experimental findings are explained on this basis.

引用

页数：20

共 53 条

[1]

ASTM, 2012, E399 Standard Test Method for linear-elastic Plane Strain Fracture Toughness K(IC) of Metallic Materials

[2]

Atluri S.N., 1986, COMPUTATIONAL METHOD

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