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Dear friend:

            As known to all, the magnitude of the stress/strain at the crack tip is  mathematically infinite,while it is physically finite. So,what i am concerned is how to caculate the value of the stress/strain at the tip.What's more, i doubt that  whether the CTOD is constant during the propogation process.if yes.so can i take a constant range of the limited stress/strain near the crack tip? If there is any reply ,i will be appreciated!

The response of structural materials to external mechanical load may strongly depend on the rate at which the load is imposed. For example, a specimen may exhibit ductile fracture if loaded at quasi-static rate (strain rate below 1.0/s), but may show brittle fracture under impact (high-rate) loading. According to the classic monograph of Professor Marc Meyers, if the strain rate is above 100/s, it can be put into the high-strain rate regime. The mechanical behavior of structural materials under such loading conditions is dubbed dynamic.

Hi!



Hope doing well.



I am in trouble with interaction properties in CEL? I noticed that whatever my shear stress and frictional co-efficient value is, model always take it as zero i.e. frictionless property. I did this using tangential behaviour and penalty.



But I have to model it using shear stress value.



Please advice.



Thank you.



Sincerely-

sujan dutta.        

can we analyse offshore structures in ansys

By: Payam Soltani; P. Bahar & A. Farshidianfar