Hi all, I have noticed that Beam188 gives wrong results, you can try by modelling a simple cantilever. Which element shall I use in place of beam188 please. Best regards, Salam Taha Hassan Salam.Hassan@manchester.ac.uk ________________________________________ From: Xansys-temp [xansys-temp-bounces@xansystest.info] on behalf of Éric Gabrielli Desjardins [eric.gabrielli-desjardins@polymtl.ca] Sent: Sunday, November 01, 2015 7:22 PM To: XANSYS Mailing List Temporary Home Subject: [Xansys] [WB] Multilinear Kinematic Hardening question Hi all, I am trying to model the material properties of a nonlinear isotropic epoxy adhesive with workbench engineering data window. I have the following data : Young’s Modulus, Poisson’s Ration, Bulk Modulus, Shear Modulus, Tensile Ultimate Strength and the three following point from the shear stress/shear strain curve : Linear limit point, knee point, ultimate failure point. I entered the linear properties by adding and filling an “Isotropic Elasticity” property card. I also added the tensile ultimate strength. I am now trying to add the adhesive nonlinear behavior with the Plasticity tool “Multilinear Kinematic Hardening”, although it won’t let me enter a non-zero first strain point. I’ve went through the Ansys documentation and from what I understood, the MKIN tool that I am using is requiring “Stress vs. Plastic Strain Points” but what I want is a “Stress vs. Total Strain Points”. I could either use the “Stress vs. Total Strain Points” MKIN data formulation by using an APDL command box (but I am not really familiar with APDL commands) or adapt my shear stress/strain data to the “Stress vs. Plastic Strain Points” formulation. Here’s my question, does it make sense if I use the Engineering data plasticity tool MKIN with the following points: (0, a random very low stress value), (linear strain, linear stress), (knee strain, knee stress) and (ultimate strain, ultimate stress)? Or how could I estimate an initial shear stress value that makes sense? Thank you, Eric Gabrielli-Desjardins Graduate student at Polytechnique de Montreal _______________________________________________ Xansys-temp mailing list Xansys-temp@xansystest.info http://xansystest.info/mailman/listinfo/xansys-temp_xansystest.info If you are receiving too many emails from XANSYS please consider changing account settings to Digest mode. Please send administrative requests such as deletion from XANSYS to xansys-mod@tynecomp.co.uk and not to the list

On 02/11/2015 21:04, Salam Hassan wrote: > > I have noticed that Beam188 gives wrong results, you can try by modelling a simple cantilever. Which element shall I use in place of beam188 please. > It will certainly model a simple cantilever accurately if you subdivide it into a reasonable number of elements or set Keyopt(3) to 3 to have a cubic shape function (rather than the default linear shape function). -- Martin Liddle, Tynemouth Computer Services, Chesterfield, Derbyshire, UK. www.tynecomp.co.uk