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 Book Chapter
1.  Peng Xu, Zhonghua Wu and Arun S. Mujumdar, Mathematical Modeling of Industrial Transport Processes, TPR Group, NUS, Singapore, 2009.

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PrinceUS's picture

Parts from two diffterent models need to be combined into one entirely new model

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Dear all,


I have two two model each is containing one part. I want to bring those two parts  from the two model into one entirely new model. It would be highly appreciable if  anyone of you kindly give a solution of this issue.,


Best Regards



Gurudutt Chandrashekar's picture

A question on Residual Load Vector in Abaqus User Element Subroutine implementation

Hello all,


I am implementing a Finite Shell element in Abaqus as a User Element.  I have a question regarding the Residual Lod vector that has to be defined in the User Element Subroutine.  

We know that K(du)=R-f       where R is the external force vector at time t+dt

                                                  f is the internal force vector at time t which depends on the present stress state

Magnetic bodies undergoing large deformations: how should we pull magnetic fields back to the reference configuration?

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As is well known, the formulation of the equations describing a deformable solid is best done in the Lagrangian setting. For magnetized solids, however, one needs to take into account the magnetic field $h$ and the induction field $b$ generated by the body, whose description is usually done in the Eulerian setting.

Coupled Euler-Lagrangian FEA to simulate fluid entering micro pores in Abaqus/Explicit

Hi all,

         How to model a pipe which has pores in its internal surface, when the pipe is filled with water and closed at the both ends. Now when the pipe is impacted in the 3 point bending mode water will enter in side the pores and will cause some damping (resist bending).

        Is there a modeling technique in Abaqus to do this type of analysis? We need to have the pores modeled as well as water entering inside the pores, however i want to do the simulation in the macro level (i want to simulate the full pipe). Thanks in advance.   

Arash_Yavari's picture

Atomic Structure of Steps on 180^o Ferroelectric Domain Walls in PbTiO3

Using the method of anharmonic lattice statics, we calculate the equilibrium structure of steps on 180^o ferroelectric domain

What is stress? Some more evidences

What is stress? Is stress a physical quantity?(second section)What is stress? Who has ever seen stress? Is stress a physical quantity?(second section)

Markus J. Buehler's picture

Special issue on "Computational and Theoretical Materiomics" now published (J. Computational &Theoretical Nanoscience)

The special issue on "Computational and Theoretical Materiomics: Properties of Biological and de novo Bioinspired Materials" has now been published. A list of papers is included below. A sincere thank you to all contributors! Anyone interested in a reprint of any of the articles please send me a message.

What is stress? Is stress a physical quantity?(second section)

What is stress? Who has ever seen stress? Is stress a physical quantity?(second section) Let us re-consider an example for metal foam as show n Figures 1(a,b) that show the local flexuosity under cycle compression loading. Previous researchers used the effective elastic moduli theory and the effective stress concept to study this kind of problem.

zishun liu's picture

InternationInternational Journal of Applied Mechanics (IJAM) Vol.2 No.3


Published papers of International Journal of Applied Mechanics (IJAM) Vol.2 No.3: 

1.    “Yield Design Homogenization Method For Compaction Of Monosized Spherical Powders”, Benabbes Anouar, Siad Larbi, Dormieux Luc, Wing Kam Liu, (Universit´E De Reims, France, Northwestern University, USA 

Help about Modeling Impact in 3D composite element at low velocity


My research consist to anlyse the effect of impact at low velocity in 3D composite model by using the F.E modeler Abaqus 6.9.1


if any one can help at my study I hope that exist it makes me happy.



Capillary effect can be trivial in gecko adhesion

The present study is motivated by two classes of seemingly contradicting experiments on the effect of humidity or the capillary effect on adhesion. While one class of experiments suggests strong effect of humidity in gecko adhesion, those on micromachined surfaces indicate that the adhesion energy remains constant up to a relative humidity of 60–70% even for hydrophilic surfaces. To resolve this apparent paradox, we perform numerical simulations of the vertical peeling of a spatula pad adhered to a rough surface with periodic attachment sites.

On optimal hierarchy of load-bearing biological materials

Load-bearing biological materials such as shell, mineralized tendon and bone exhibit 2-7 levels of structural hierarchy based on constituent materials (biominerals and proteins) of relatively poor mechanical properties. A key question that remains unanswered is what determines the number of hierarchical levels in these materials. Here we develop a quasi-self-similar hierarchical model to show that,

Mechanical properties of unidirectional nanocomposites with non-uniformly/randomly staggered platelet distribution

Unidirectional nanocomposite structures with parallel staggered platelet reinforcements are widely observed in natural biological materials. Our recent paper, published in J. Mech. Phys. Solids, is aimed at an investigation of the stiffness, strength, failure strain and energy storage capacity of a unidirectional nanocomposite with non-uniformly or randomly staggered platelet distribution.


Hi all,

     Currently, I am using ANSYS 12.1 for the fatigue crack propagation simulation for the edge crack & center crack plates. It is a mixed mode crack propagation.


Can anybody please tell me or guide me how to write the code in the ANSYS using APDL for automatic remeshing around the cracktip when crack propagates to the new position?

 Thanks in advance. :) 


Concrete Smeared Cracking model in Abaqus


I order to model the cement board material, i am going to use "Concrete Smeared Cracking" model available in Abaqus. I think I have to adjust some variables affecting the properties of the concrete to get the numerical load-deformation response close to that of the cement board.

I will be thankful if anyone help me.

Experimental Load-displacement curve for Gl/VE composites under compression-after-impact

This image shows the experimental load-displacement curve for glass fiber reinforced vinyl ester composites under compression-after-impact.

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