Blog posts

Post-doc application still open in Southampton

Submitted by Fabrice Pierron on Mon, 09/15/2014 - 16:26

There is still time to apply the 5-year post-doctoral position at the University of Southampton. We are looking for a talented young researcher to join a group working on the definition of the next generation of high strain rate tests based on ultra-high speed deformation imaging and inverse identification (PhotoDyn project). Please apply online before September 30th.

Radial of support domain in SPH

Submitted by s.faraji on Mon, 09/15/2014 - 10:08

research

I test the proficiency of SPH method dealing with a benchmark numerical example solving Poisson's equation; SPH shows the good efficiency in modeling the contours, but the value of results change for a different nodal distributions (different

Perfect Plasticity

Submitted by Zhigang Suo on Sun, 09/14/2014 - 22:08

These notes are writen for part of a course on plasticity.

Stress-strain curve of a metal

Submitted by Zhigang Suo on Sun, 09/14/2014 - 22:04

These notes are part of a course on plasticity.

Plasticity

Submitted by Zhigang Suo on Sun, 09/14/2014 - 21:58

education

Plasticity

lecture notes

I am teaching this course this semester. I'll post notes as I write them. Links to the notes are listed in this post. I will also notify updates on twitter: https://twitter.com/zhigangsuo

Basic Equations in Fluid Mechanics

Submitted by Zhigang Suo on Sun, 09/14/2014 - 21:01

education

I wrote these notes as a background for teaching elasticity and plasticity. Even in this most basic formulation, the dilation of the fluid is viscoelastic.

Load Displacement curve for XFEM in ABAQUS

Submitted by Anonymous (not verified) on Sat, 09/13/2014 - 16:35

ABAQUS

fracture mechanics

Abaqus XFEM

ABAQUS XFEM crack propagation

I am using Maxps Damage criteria for an XFEM crack for a three point bending case. I am using displacement loading on the specimen and wish to plot reaction load v/s mouth opening displacement. I would like to know how to obtain the crack tip opening displacement in ABAQUS. All the journal papers I read show a slump in reaction force after the crack starts to propagate. I plot the results and contour plots show me clearly that the crack has started to propagate. Please help.

Post-doc position in Model Reduction (CU Boulder)

Submitted by jeonghoonsong on Sat, 09/13/2014 - 15:54

job

We are no longer accepting appciations for this position.

Qulified applicants will be contacted soon.

Thank you for your interests again.

equivalent strain

Submitted by far_jod on Sat, 09/13/2014 - 12:07

plasticity 2D

Dear reaserchers

Here is my question in developing the eqivalent strain via in-plane stress problems. please let me find your answers.

I did an experimental test on a 6 mm thickness plate. Principal strains (ε₁,ε₂) was developed from recorded strains via Rosset strain gauges . To develop the equivalent strains I need ε_{1 ,}ε_{2 ,}ε₃ in the following eqation:

dε_e=(√2/3)(dε₁²+dε₂²+dε₃²)^1/2

how can I deal with the thickness strain in the Shell elements (S4R) writing a VUMAT subroutine ?

Submitted by shahram on Sat, 09/13/2014 - 09:56

research

Hey buddies

I am writing a constitutive relation in vumat for plane stress conditions with S4R elemet in the ABAQUS.

the problem is that the E33 is reported as zero where it is not zero and also the values for S11 and S22 are so large numbers.

ihave tried the code for 3D conditions and it work great with C3D8R element and the results are satisfactory where for the Shell elements by enforcing the S33=0, the E33 gets zero too.

does anybody have any solution?

thanks alot

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