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Cohesive elements parameters

Submitted by parisa on

Hi,

I am working a long time on using cohesive elements in ABAQUS but up to now my efforts have be unsucessful.

I want to use of cohesive elements with the following paramters:

Damage initiation: Normal stres= 1.9 MPa, shear stress= 6.2 MPa 

Damage evolution:  Mode I fracture energy= 0.5307, Mode II farcture energy= 0.6623

Could any body kindly let me know that what would be my model E/Knn, E/Kss parameters?

Thank you,

Parisa

 

convergence problem in interface delamination modeling in ansys

Submitted by saeedspace on

hi every body..

im trying to  model interface delamination in ansys. i use inter204 or 205 for interface element.the problem is that as the stress in interface riches the yield value, the solution doesnt converge.

 

i tried to increase  the number of substeps or decrease the size of element, but the problem still exists.

 

 

Stress Wave Propagation in a Split Hopkinson Pressure Bar

Submitted by Emeka on

Hello I am a student of the University of Manchester. I am modelling a SHPB assembly together with the specimen, and I am having trouble with placing the loads,creating the boundary constrain between the incident, transmitter bar and the specimen. I created the interaction between the assembly with a suppressed TIE, and after loading and submitting the job I kept on getting errors. The load did not transmit to up to a quarter of the incident bar.

Dynamic Analysis of Tank filled with Fluid

Submitted by debian_asl on

hi all,

i want to perform dynamic analysis of a tank filled with fluid. I was trying to model this in ANSYS with FLUID80 element for fluid and shell element for the shell. But due to complexity, i was forced to used degenerated solid element, which FLUID80 does not allow.

 

please tell me any other way to model it.

PhD opportunities @ Oxford (for EU / UK nationals)

Submitted by v.tagarielli on

Dear iMechanica commmunity,

we are looking for 3 PhD students at Oxford, starting from the 1st of October 2010 or as soon as possible thereafter. The closing date for the application is the 26th of July. The 3 students are required for two different research projects, namely:

 

1) Underwater blast on composite structures - open only to EU nationals; 2 PhD students are required. The studentships are advertised here

http://www.eng.ox.ac.uk/jobs/job.html?job=255