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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.

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

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

Dear friends,

Recently my study is focus on bolt analysis on wheel hub assembly.

In simulation using Abaqus, I try to give a certain value of tightening torque on bolt to determine the clamp force.

But, I do not know how to apply the torque value on FE model.

Can we convert torque to became as an axial force?

Or, convert torque to moment?