xfem

Hi,

我have used XFEM in Abaqus for static analysis. I use traction-separation cohesive behavior with XFEM.

我想用XFEM隐式动态分析。我am using Abaqus version 6.12. As far as I know xfem was allowed only with static analysis in earlier Abaqus versions (6.9). I read that the newer versions have implicit dynamic analysis compatiblity with XFEM.

Hi

我am new to modelling and am trying to model a plate with a middle crack using Abaqus.

What is the difference between modelling a cohesive and LEFM crack growth (I know cohesive involves plasticity and the traction/displacement curve and LEFM is for brittle materials).

For cohesive, I used max principal stress for damage criteria and damage evolution based on energy criteria.

Hellow everyone,

我've been studying XFEM method in Abaqus these days, then i want to model an inclusion problem to see the crack initiation and propagation at the interface. First i sketch a square to stand for a unit cell, then in order to assign different sections to inclusion and matrix, i cut a circle (circular inclusion) from the initial square. But when it comes to meshing, i don't know how to mesh the instance with structral quad elements independantly of the outline of the inclusion. Could anyone help me?

我n using Abaqus 6.12 XFEM software is there a field output request that can be specified to track the location of the crack tip as a crack grows through time?

Dear Colleague

我am modelling a 2D three point bending to analysis the crack propagation , i have a question in the part of damage evaluation, does anybody know what is different between, B.K , power law and mod.independent? means when we select one of them. Thanks

please help me on selection of enrichment function for modeling of hole in XFEM and how to added the additional degree of freedom to the enrichment nodes and also on implementation of XFEM please help me

Thanks in advance

Hi everybody,

我am anurag working on damage mechanics of 2x2 twill woven composite, i will conduct the carbon/epoxy laminates under various regimes of service loas (quasi static loading, low velocity impact, fatugue, post impact) and will also model crack propogation of the same using XFEM.I have studied FEM at graduate level.

我nitially i will calculate mechanical properties of woven composite using unit cell method by applying homogenization process.

Hi all,
我'd like to ask whether anyone has applied XFEM for a user-material (UMAT). What is the process to do that? Could anyone provide some advice, documentation or guidelines?

All the best,

Panos

p.s. I 've heard that a UEL code is needed to couple XFEM with UMAT.