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FEM

What are the regular iteration steps of cohesive model based FEM for crack problems

Submitted by Wen Ye on

   Hi, 
         I'm now start to learn cohesive zone model based FEM for crack problems. According the a regular coehsize model (bilinear for example), the relative displacement and the cohesive stress are both unknwon, so iteration is required. My question is that what are the regular iteration steps?
 
Thanks. 

Modeling of Particulate Composites

Submitted by Yogesh_Bisht on
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Hi

I am trying to model particulate composites and simulate their stress-strain response. The problem that I am facing is that the inclusions (stiffer than the matrix) are only acting as points of stress concentration. Consequently their is no strengthening and hence no apparent increase in load carrying capacity of the composite. Any help/suggestioin in this regard would be higly appreciated.

Regards 

 

 

Abaqus: Composite delamination with cohesive elements

Submitted by Maria Pia on
 
Hello,
I have to do a FEA regarding impact damage and delamination propagation in a CFRP specimen.
I have to do this using cohesive element in order to see the propagation of the delamination front in the material.
My problem is that I don't know how to do this in Abaqus.
I'll better explain: I can use this software but is the first time approching composite behavior and I really don't know how to model that.

PhD position in Analysis of Fracture in Porous Ceramic Catalysts by use of X-ray Tomography

Submitted by hlfrandsen on
The Department of Energy Conversion and Storage at the Technical University of Denmark (DTU) and Haldor Topsøe A/S (HTAS) is seeking a candidate for a PhD position in analysis of fracture in porous ceramic steam-reforming catalysts by use of X-ray tomography.
 
Responsibilities and tasks


huge difference of Young's modulus in sandwich structure

Submitted by Han Shiwei on

I am modeling a plate under three point bending with Abaqus. The plate
is a sandwich structure with aluminum plate (thickness: 5mm), adhesive glue (thickness:
0.02mm) and a kind of foam (thickness: 15mm) bonding together. Their Young’s
modulus is at the order of 100GPa, 1MPa and 100MPa. While in incremental
calculation, the job is always be aborted for not achieving convergence. I just
wonder whether the cause of not achieving convergence should be attributed to
the huge difference in Young’s modulus.

 

huge difference of Young's modulus in sandwich structure

Submitted by Han Shiwei on

800x600

Hello,

I am modeling a plate under three point bending with Abaqus. The plate
is a sandwich structure with aluminum plate (thickness: 5mm), adhesive glue (thickness:
0.02mm) and a kind of foam (thickness: 15mm) bonding together. Their Young’s
modulus is at the order of 100GPa, 1MPa and 100MPa. While in incremental
calculation, the job is always be aborted for not achieving convergence. I just
wonder whether the cause of not achieving convergence should be attributed to
the huge difference in Young’s modulus.

Method for Simulation of Universal Joint

Submitted by Prahel on

Hello Everyone,

I have to simulate and find the pressure on the splines in the universal joint. I have to define contact surface and to find a simple method to run analysis on this joint. I am finding it very difficult to select all the surface on every spline. Also, it will make the simulation very big.

Could anyone please help me to find a method or an easy way out. Any kind of suggestions are most welcome.

 Regards

Prahel 

The Dept of Eng Sci at Uppsala University is looking for a project worker in structural modeling of the 17th century Vasa Ship

Submitted by syvoney on

The Swedish
17th century Vasa ship is unique in its kind and of high cultural
and historical interest. Therefore, interdisciplinary research teams are
constantly busy to keep the slowly degrading and deforming warship in good
geometrical shape. Initiated in 2012, the latest research project aims to
investigate creep in the Vasa ship and to develop a new support system for
improved dimensional stability. For this purpose a finite element model will be
created to assess the effect of varying geometrical parameters and material
properties. One of the key aspects is the influence of the joints of the ship