Attached herewith a classical paper by Hart on introducing a concept of constant hardness curves refuting that absolute strain should not be considered as a state variable.

The interesting part is he uses a stress relaxation test to prove the same. Stress relaxation test, here refers to a tensile test, where the test is stopped after say certain amount of plastic deformation. The stress drops a little, but the total strain is constant. However, it is argued that there is a small inelastic deformation, which is the cause of this load or stress drop.

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

New book on Damage and Failure in Composite Materials written by Prof. Ramesh Talreja (Texas A&M Univ.) and Prof. Chandra Veer Singh (Univ. of Toronto)

Publishers:  Cambridge University Press.

1 PhD student position is open in the Department of Mechanical Engineering (MEK), Technical University of Denmark (DTU).

Hi,

In a novel design of lithium-ion batteries, hollow electrode particles coated with stiff shells are used to mitigate mechanical and chemical degradation.  In particular, silicon anodes of such core-shell nanostructures have been cycled thousands of times with little capacity fading.  To reduce weight and to facilitate lithium diffusion, the shell should be thin.  However, to avert fracture and debonding from the core, the shell must be sufficiently thick.

Hi Everybody, 

I'm using Mohr-Coulomb with Cohesion Hardening  in Abaqus and I'm wondering how can I postprocess the state of Cohesion in the field?



Tanks ahead,

-Ali

 

Dear all,

Could anyone help to give me some advice on how to implement a kind of nonlinear interaction relevant to relative velocity in ABAQUS? The interaction force has a quadratic function with the relative velocity between two nodes. Thanks.