Contact Mechanics Forum

Hello,

I would like to know how contact elements are different from " general "ie non contact finite elements.

Also I would like to know how Lagrange multiplier method is used in contcat analysis.

My understanding of the Lagrange multiplier is like this: when we have to impose a constraint equation

[C][D]=[Q] as constraint between DOFs, we incude a term Y*{[[C][D]-[Q]} where Y is the Lagrange multiplier ,in the potential energy functional and minimize the functional  to get the algebraic equations.

hi guys, im new to abaqus.

anyone know how to model a unidirectional composite laminate in abaqus?

Hello,

I am a new user of Abaqus and need to model a glued connection between 2 solid elements (the nodes on both elements must have same displacement, no relative movement between them). In other software (cosmos/m for instance) this is accomplished by merging these overlapping nodes.

I need to do this in Abaqus, looked in the huge Abaqus documentation, but it is hard to find this for complete beginner. Please help.   

Study of wear in complex micro-mechanical components is often accomplished experimentally using a pin-

on-disc and twin-disc tribometer. The present paper proposes an approach that involves a computationally

efficient incremental implementation of Archard’s wear model on the global scale for modeling sliding and

slipping wear in such experiments. It will be shown that this fast simplistic numerical tool can be used to

identify the wear coefficient from pin-on-disc experimental data and also predict the wear depths within a

Hi guys,

I am using Discrete element method for my research. I just wonder if some one has any idea to calculate the stress of the particle when the loads applying on periphery of that particle are known?

this is one idea to simple case, for exemple a rectangular shape which is apllied by loads F1, F2 on two oposite surfaces as tensile loads. Then the stress can be calculated as:

stress=min(F1, F2)/(Crosional Area);

the difference load abs(F1-F2) is used for motion of that body

I am trying to setup a alghoritihm for nesting of 2D objects in a restricted area with minumum space left. For this purpose what kind of contact approach I should follow? Thanks already to whom may respond.

plesase help me to a model a 1D ballistic impact analysis problem  using discrete finite element method

i wish to model a one dimensional impact analysis using discrete finite element method.please give your sugestions