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dynamic crack propagation

Submitted by llguang on

Hello everyone, I am useing the CZM method researching the dynamic crack propation problem in composites,so I must have the UEL OR VUEL of cohesive zone elements in ABAQUS or other FEM software,at this moment,  i have a UEL of ABAQUS,so i have a question ,if i want to simulate the dynamic crack problem, can i use the UEL? Or must write my VUEL?

Everyone answer is welcome

If some people have the same researching plan ,we can communicate each other!

For metals, when will the elastic modulus be changed?

Submitted by flong208 on
research

I have a question, for the same metal material, when will the elastic modulus will be changed? in another words, in what kind of processing or machine condition will the elastic modulus be changed? for example, to machine elements(gear, bearing ...), when the part surface is case hardened,will the elastic modulus be changed? if not, how can the difference of hardness between case hardened surface and without hardened substrate be reflected in FEM analysis? how can the case hardened surface parameters affect the contact stress when two part are brought to contact?

Pullout force in Abaqus( NFORC3,RF3???)

Submitted by siddharthvad on

To be precise this is what i am doing

I have 2 cylinders( which
would later be replaced by stent and hollow tube resembling artery) one
made of Nitinol and other made of Hyperelastic Material PDMS( material
properties are inputted)

The Outer diameter of the Inner cylinder is
7.5mm while in the Inner Diameter of the Outer cylinder is 7mm. The
Outer cylinder is Hyperelastic, Inner is Nitinol

These are my steps

Step1: Compression of Nitinol cylinder

Step2:

Structures in fire

Submitted by Emmanuel E. Ufuah on
research
convergence problems
Fire Modelling
heat transfer and stress analyses

Hi,

Are there researchers working on specific areas in offshore structures? Or is anyone covering the material behaviour of structures at elevated temperatures? I am indeed challenged to read about excitng contributions from different scholars expecially in structural mechanics. I realise I have just begun a race in research. You could help me gain the proper direction in research.

I shall be glad to get any response. 

Emmanuel

Modelling offshore platform deck in fire

Submitted by Emmanuel E. Ufuah on
NLGEOM

Hello fellow researchers,

I am almost completing my first year in research study and am finding it difficult running my structural simulation in ABAQUS once I have included non-linear geometric effects. I didn't have problem with the simple heat transfer analysis. I have also converted (--) to the true stress-logarithmic strain curves at elevated temperatures using the empirical model given in EC3, yet no good outcome. Can anyone suggest to me how I could go about it?

Comments will be gratefully appreciated.

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