VCCT

I am working on FE Simulation of interface cracks. To this end, I use modified VCCT, CSDEM and other such methods to determine mesh independent strain energy release rate (G) and Mode mixity (ψ). Now I have a fundamental doubt.

Mode-Mixity computation in 'Interface crack'

Submitted by shreeram111 on Mon, 08/15/2016 - 06:25

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Computational Mechanics Forum

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fracture mechanics

bimaterial fracture mechanics

interface cracks

VCCT

CSDEM

# Finite Element modeling

cohesive crack; computational mechanics

FEM simulation

ABAQUS

mode mixity

Hello everybody,

crack propagation in Abaqus (VCCT) with remeshing

Submitted by havelmay on Thu, 06/23/2016 - 08:06

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Fracture Mechanics Forum

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I started using VCCT with quarter tip elements in Abaqus (not XFEM). I can solve the problem and get the SIFs.
How can I let the crack grow? Has someone a script for crack growth and remeshing that I can implement?

Debonding simulation - XFEM fracture criterion - delamination

Submitted by davidrbmelo on Thu, 01/02/2014 - 10:49

XFEM fracture criterion

DCB test

direction

Hello

I am using Abaqus/CAE 6.10 to simulate a Debonding test (cohesive behavior for composite delamination).

I ran a Abaqus debonding simulation example (from Abaqus online documentation - Abaqus Benchmark Manual - 2.7.1 Delamination analysis of laminated composites).

The Abaqus/Explicit three-dimensional model with surface-based traction-separation behavior used a surface contact interaction property with:

- default Cohesive behavior

reading nodal values (EFENRRTR) into a UMAT routine

Submitted by jodavies03 on Wed, 01/16/2013 - 11:04

Hi,

I am using the VCCT method to model crack propagation and I am finding the value of G/Gc is too large for any sensible time step (1e-25).

I am attempting to incorporate a time incrementation scheme into my UMAT which monitors EFENRRTR and modifies the time step (or PNEWDT) according to it's value.

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