Skip to main content

Blog posts

Deduction of derivatives of free-energy density function in ABAQUS UHYPER

Submitted by Lianhua Ma on
Dear xuanhe and all,
I have reviewed the paper "Method to analyze programmable deformation of dielectric elastomer layers". (Xuanhe zhao, Zhigang Suo)
It is very insteresting.
I have one question you would like to ask you.  Hope to get your reply.

EMI 2010 Engineering Mechanics Conference at USC, Los Angeles California, August 8-11, 2010

Submitted by Amar A. Chaker on

EMI, the Engineering Mechanics Institute of ASCE, will hold its annual conference on August 8-11, 2010 at the University of Southern California in Los Angeles, CA.   Dr. Roger Ghanem (Department of Aerospace & Mechanical Engineering) and Dr. Amy Rechenmacher (Department of Civil and Environmental Engineering) will be the Co-chairs of the EMI 2010 Conference.

Periodic Boundary Conditions for uniaxial compression

Submitted by Gouse on

Dear All,

I am trying to simulate mechanical behaviour of a concrete unit cell for uniaxial compression laoding. I have apllied periodic bounadary conditions on both lateral edges using linear equation option available in ABAQUS where as on top and bottom edges load is apllied. Deformed structure shows there is no lateral deformation and unit cell behaves as if it is confined laterally on both sides. I am confused about my boundary conditions whether they are correct or not. 

 Equation used to aplly periodic bounadary condition are

concrete stress strain curve

Submitted by omaromar on

i make FEA for my master research in ANSYS PRO., i simulate a prestressed concrete beam with two precast units connected by contact element (CONTA.52). i used solid 65 for concrete modelling and link 8 for for prestressing steel with initial strain, i entered the stress strain curve for the concrete with linear isotropic, concrete and multilinear isotropic in five points as below:

strain=0.0004    stress = 12 Mpa

Strain = 0.001   stress = 30 Mpa

Strain = 0.0015   stress=37.5 Mpa