A Bilinear Failure Criterion for Mixed-Mode Delamination

Peridynamic theory has recently shown to be a versatile tool for simulating complex phenomena related to the fracture and fragmentation of structural and composite materials. We introduce a novel failure criterion based on the classic stress tensor which takes inspiration from an approach proposed in the literature. Differently from the classic critical stretch-based failure criterion used in peridynamics, our approach takes into account the total elastic energy stored in the bond allowing to predict with more accuracy problems that involve mixed-mode I-II fracture. In order to show the effectiveness of the proposed failure criterion, a benchmark fracture problem is analyzed showing a good agreement with the experimental results and the numerical results obtained with other numerical methods.

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Détermination expérimentale du comportement mécanique et de critère de rupture d'assemblages sous chargements mixtes. Application aux rivets et points soudésExperimental characterisation of mechanical behaviour and failure criterion of assemblies under mixed mode loading. Application to rivets and spotwelds

Mécanique & Industries ◽

10.1016/s1296-2139(03)00046-0 ◽

2003 ◽

Vol 4 (3) ◽

pp. 273-283 ◽

Cited By ~ 8

Author(s):

B Langrand

Keyword(s):

Mechanical Behaviour ◽

Failure Criterion ◽

Mixed Mode ◽

Mixed Mode Loading

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Finite Element Simulation of Crack Propagation Under Mixed Mode Loading Condition Using Element Removing Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.345-346.501 ◽

2007 ◽

Vol 345-346 ◽

pp. 501-504

Author(s):

H.S. Kim ◽

K.S. Kim ◽

Young Seog Lee

Keyword(s):

Finite Element ◽

Crack Propagation ◽

Finite Element Simulation ◽

Crack Growth ◽

Failure Criterion ◽

Mixed Mode ◽

Loading Condition ◽

Crack Tip ◽

Mixed Mode Loading ◽

Element Simulation

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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