A separable cohesive element for modelling coupled failure in laminated composite materials

Lü, Xin; Chen, B.Y.; Tan, V.B.C.; Tay, T.E.

doi:10.1016/j.compositesa.2018.01.014

Cited by 48 publications

(42 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example traditional cohesive elements (CEs) along interface cannot deal with the stress transfer very well. Hence in order to model interactions between interface debonding and matrix cracking, adaptive splitting of CEs to comply complex crack configuration is needed [26,27]. In the modelling of progressive failure of heterogeneous material, the interaction between matrix cracking and interface debonding should be well addressed.…”

Section: Introductionmentioning

confidence: 99%

Modelling progressive failure in multi-phase materials using a phase field method

Zhang

Yang

et al. 2019

Engineering Fracture Mechanics

View full text Add to dashboard Cite

In this paper, a new phase field method is proposed for modelling of progressive failure in multi-phase materials. Material properties of the interface between inclusion and matrix are regularized by an auxiliary interface phase field. In addition, crack initiation and propagation are simulated by using another crack phase field. Different failure mechanisms such as interface debonding, matrix cracking and the interaction between these two failure mechanisms are modelled in a unified framework. For general application of the framework, an image processing method is employed to identify the individual phases for a given multi-phase material. The proposed method is implemented into the commercial software ABAQUS through a user subroutine UEL (user defined element). The derived method is validated through an example of a single fiber reinforced composite system. Moreover, a procedure for choosing parameters of the proposed phase field model is discussed. Further, the validated method is applied to fracture analysis of a multi-phase concrete structure and complex failure mechanisms within and across the phases are captured.

show abstract

Section: Introductionmentioning

confidence: 99%

Modelling progressive failure in multi-phase materials using a phase field method

Zhang

Yang

et al. 2019

Engineering Fracture Mechanics

View full text Add to dashboard Cite

show abstract

“…Examples can be found in the work of Melro et al 20 , Han et al 21 , and Pulungan et al 22 However, such models has to be implemented in a finite element model where no explicit expressions are provided. In addition, the computational cost of a cohesive element method is high as reported 13,23,24 . Hiremath et al 25 presented an analytical elasto-plastic damage micromechanics model for the stiffness reduction of a composite.…”

Section: A Micromechanics Based Elastoplastic Damage Model For Unidirmentioning

confidence: 99%

“…is a bridging matrix for a global two-phase composite, whose expressions are given in Eqs (21)(22)(23)(24)(25)…”

mentioning

confidence: 99%

A micromechanics based elasto-plastic damage model for unidirectional composites under off-axis tensile loads

Wang

Chen

et al. 2020

Sci Rep

View full text Add to dashboard Cite

Nonlinear properties of composite materials are essential for their engineering application. In this work, a three-phase micromechanics bridging model is employed to evaluate the nonlinear behavior of a composite from properties of fiber, matrix and interphase. It is assumed that the matrix elastoplasticity and the interface damage are two major sources of the nonlinearity. The former is described by the J2 flow rule. The latter is approximated by an interphase with stiffness degradation. For an interphase, an equivalent damage stress is introduced to account for the effect of normal and shear stress on the interface damage growth. Further, an explicit empirical equation is developed to relate the equivalent damage stress and the stiffness degradation of an interphase. The present elasto-plastic damage model is validated by comparing with experimental data of a series of composites under off-axis tensile loads.

show abstract

“…It has been treated in the work of Gruttmann et al 39 considering geometrical nonlinearity and elastic material behavior. Figure 20 shows a cross-section of the structure and a coarse finite The elastic material properties for carbon fibre reinforced polymers assuming transversal isotropy are taken from the work of Gruttmann et al 39 The fracture parameters for mode I and mode II are taken from the work of Lu et al 52 E 1 = 125 000 N/mm 2 cI = 45 N/mm 2 E 2 = 7400 N/mm 2 cII = 100 N/mm 2 G 12 = 4800 N/mm 2 g cI = 0.158 N/mm G 23 = 2700 N/mm 2 g cII = 0.315 N/mm. 12…”

Section: Stiffened Cylindrical Shellmentioning

confidence: 99%

A shell element for the prediction of residual load‐carrying capacities due to delamination

Gruttmann

Knust

2019

Numerical Meth Engineering

View full text Add to dashboard Cite

This paper deals with layered plates and shells subjected to static loading. The kinematic assumptions are extended by a jump function in dependence of a damage parameter. Additionally, an intermediate layer is arranged at any position of the laminate. This allows numerical simulation of onset and growth of delaminations. The equations of the boundary value problem include besides the equilibrium in terms of stress resultants, the local equilibrium in terms of stresses, the geometric field equations, the constitutive equations, and a constraint which enforces the correct shape of a superposed displacement field through the thickness as well as boundary conditions. The weak form of the boundary value problem and the associated finite element formulation for quadrilaterals is derived. The developed shell element possesses the usual 5 or 6 degrees of freedom at the nodes. This is an essential feature since standard geometrical boundary conditions can be applied and the elements are applicable to shell intersection problems. With the developed model, residual load-carrying capacities of layered shells due to delamination failure are computed. KEYWORDSdamage model, layered plates and shells, progressive delaminations, standard nodal degrees of freedom, thin intermediate layers INTRODUCTIONDelamination, or interfacial cracking between layers, is one of the most common types of damage in laminated fibre-reinforced composite structures. The reason is the relative weak interlaminar strength. Delamination as result of impact or manufacturing defect can cause a significant reduction of the load-carrying capacity of a structure. In general, the fracture process in high performance composite laminates is quite complex, involving not only delamination but also occurrence of transverse matrix cracking or fibre fracture in the layers. Stress gradients that occur near geometric discontinuities such as ply drop-offs, stiffener terminations, bonded and bolted joints, and access holes promote delamination initiation, trigger intraply damage mechanisms, and may cause a significant loss of structural integrity. Thus, a reliable prediction of different failure modes is essential. The delamination failure mode is particularly important for the structural integrity of composite structures because it is difficult to detect during inspection.The simulation of delamination using the finite element method is performed by means of the virtual crack closure technique, eg, in the works of Rybicki and Kanninen 1 and Krueger, 2 or using cohesive finite elements, eg, in other works. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] Another approach is to use continuum damage models within the layers, eg, in the works of Simon et al, [18][19][20] or to introduce thin intermediate layers along with a damage model or an inelastic material model with softening, eg, in the works 132 of Allix and Ladevèze, 21 Wagner et al, 22 and Groh et al. 23 In the works of Remmers et al, 24,25 the kinematics of solid-like shell elements is enhanced to allow for...

show abstract

A separable cohesive element for modelling coupled failure in laminated composite materials

Cited by 48 publications

References 42 publications

Modelling progressive failure in multi-phase materials using a phase field method

Modelling progressive failure in multi-phase materials using a phase field method

A micromechanics based elasto-plastic damage model for unidirectional composites under off-axis tensile loads

A shell element for the prediction of residual load‐carrying capacities due to delamination

Contact Info

Product

Resources

About