A Three‐Dimensional Ply Failure Model for Composite Structures

Abstract

A fully 3D failure model to predict damage in composite structures subjected to multiaxial loading is presented in this paper. The formulation incorporates shear nonlinearities effects, irreversible strains, damage and strain rate effects by using a viscoplastic damageable constitutive law. The proposed formulation enables the prediction of failure initiation and failure propagation by combining stress-based, damage mechanics and fracture mechanics approaches within an unified energy based context. An objectivity algorithm has been embedded into the formulation to avoid problems associated with strain localization and mesh dependence. The proposed model has been implemented into ABAQUS/Explicit FE code within brick elements as a userdefined material model. Numerical predictions for standard uniaxial tests at element and coupon levels are presented and discussed.

Damage Modeling in Composite Structures

“…The fracture angle can be determined either experimentally or alternatively using eqn [39], where q f maximizes the failure criterion. The fracture angle can be determined either experimentally or alternatively using eqn [39], where q f maximizes the failure criterion.…”

Simulating damage and delamination in fibre metal laminate joints using a three-dimensional damage model with cohesive elements and damage regularisation

“…The Crack Band Model also suffers from a mesh directionality bias, where the damage tends to follow mesh lines and therefore the direction of crack band propagation will change as the mesh is refined [21]. The crack band width and the mesh orientation bias are problematic features of the Crack Band Model, especially evident when experimental and numerical damage progression maps are compared.…”

Using a Hashin Criteria to predict the Damage of composite notched plate under traction and torsion behavior

“…These techniques have been expanded by the use of strengthening or repair patch by Ait Kaci [8]and Benzaama [9]. In the damage the models are implemented on formulations of solid type Donado [10], and more often of the shell type, these two-dimensional elements Peter Linde [11] with a geometrically zero thickness are used for problems of thickness and displacement more or they can greatly reduce the calculation time Elangovan [12].But in the case where the shear deformation occurs in structures with a larger thickness, we must opt for the use of solid elements which give results that can't be obtained by shell elements Yong Guo [13]. on which rests a good accuracy.…”