elements patran celas with variable stiffness

[flying]

Hello, everyone.
I have to insert in a paran pattern of the spring elements with variable stiffness.
The question is how can I change my stiffness? I have to insert a field field and change the stiffness within the field field is it possible to do in some other way? ?

all this is needed to simulate debonding on a bonding. the forces on the springs should grow until the rigidity of the spring is maintained different from zero (as a normal celas with constant stiffness).When stiffness assumes a near zero value, the forces on the springs should zero.

If anyone knows any other way to simulate such a situation, I'll be happy to receive suggestions

 

[MacGG]

Hello flying,

Besides what you say, perhaps the most direct and complete road should be the use of cohesive materials.

you can travail an example in:
http://www.scribd.com/doc/15665727/composite-fracture-and-delaminationI hope you can help.

Hi.

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