FINITE ELEMENT SIMULATION OF ELASTIC AND QUASI – STATIC CRACK PROPAGATION UNDER MIXED MODE LOADING CONDITIONS

In this study, we introduce an approach which simulates crack propagation under mixedmode loading condition. In comparison with the conventional element removing method which eliminates any element that satisfies a prescribed failure criterion near the crack tip, the present approach selects a set of elements ahead of the crack tip on the crack growth direction and removes them one by one when the element meets a prescribed failure criterion. Compact tension shear (CTS) specimens of type 304 stainless steel were used for failure testing. Finite element simulation has been carried out to simulate crack profiles and compared with observed ones. Results showed the proposed element removing algorithm is useful for crack growth simulation under mixed mode loading condition. The experimentally measured crack growth profile is in an agreement with the predicted ones.

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2D finite element simulation of mixed mode fatigue crack propagation for CTS specimen

Journal of Materials Research and Technology ◽

10.1016/j.jmrt.2020.04.083 ◽

2020 ◽

Vol 9 (4) ◽

pp. 7850-7861 ◽

Cited By ~ 4

Author(s):

Abdulnaser M. Alshoaibi ◽

Yahya Ali Fageehi

Keyword(s):

Finite Element ◽

Fatigue Crack ◽

Crack Propagation ◽

Finite Element Simulation ◽

Fatigue Crack Propagation ◽

Mixed Mode ◽

Element Simulation

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The use of the dynamic J integral (J′) in finite-element simulation of mode I and mixed-mode dynamic crack propagation

International Journal of Pressure Vessels and Piping ◽

10.1016/0308-0161(90)90068-s ◽

1990 ◽

Vol 44 (3) ◽

pp. 329-352 ◽

Cited By ~ 17

Author(s):

T. Nishioka ◽

R. Murakami ◽

Y. Takemoto

Keyword(s):

Finite Element ◽

Crack Propagation ◽

Finite Element Simulation ◽

Mixed Mode ◽

Dynamic Crack Propagation ◽

Mode I ◽

Dynamic Crack ◽

J Integral ◽

Element Simulation ◽

Dynamic J Integral

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Fatigue Crack Growth Analysis with Extended Finite Element for 3D Linear Elastic Material

Metals ◽

10.3390/met11030397 ◽

2021 ◽

Vol 11 (3) ◽

pp. 397

Author(s):

Yahya Ali Fageehi

Keyword(s):

Finite Element ◽

Fatigue Crack ◽

Fatigue Life ◽

Crack Propagation ◽

Crack Growth ◽

Mixed Mode ◽

Propagation Path ◽

Loading Conditions ◽

Extended Finite Element ◽

Linear Elastic

This paper presents computational modeling of a crack growth path under mixed-mode loadings in linear elastic materials and investigates the influence of a hole on both fatigue crack propagation and fatigue life when subjected to constant amplitude loading conditions. Though the crack propagation is inevitable, the simulation specified the crack propagation path such that the critical structure domain was not exceeded. ANSYS Mechanical APDL 19.2 was introduced with the aid of a new feature in ANSYS: Smart Crack growth technology. It predicts the propagation direction and subsequent fatigue life for structural components using the extended finite element method (XFEM). The Paris law model was used to evaluate the mixed-mode fatigue life for both a modified four-point bending beam and a cracked plate with three holes under the linear elastic fracture mechanics (LEFM) assumption. Precise estimates of the stress intensity factors (SIFs), the trajectory of crack growth, and the fatigue life by an incremental crack propagation analysis were recorded. The findings of this analysis are confirmed in published works in terms of crack propagation trajectories under mixed-mode loading conditions.

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