julia543
Mechanical
- Jul 3, 2007
- 1
Hi,
i want to simulate a crack within an aluminium-bar. i used cohesive elements in the way, that i divided the bar into three parts, where the middle part is the very thin cohesive element. in the section i used cohesive->traction seperation->initial thickness->use analysis default. in the material section i used elastic type traction with the values for e-module an the two g-modules, for the damage criterion i used maxs damage with the values of predicted failure and for the damage evolution i used the fracture energy. in the first step i put pressure load on the front side with a ramped amplitude an then a second step for the wave to develop through the material. for the connection between the cohesive elements and the surrounding material i used tie constraints, where the slave is always the cohesive element. i meshed the surrounding material normal, and for the cohesive element, i used cohesive, btw both with the same size. the problem, which occured, is that the wave doesn't go trough the cohesive element an thus there is no effect to see. can you help me. i guess the problem is with the tie constraint or the mesh!
thanks
i want to simulate a crack within an aluminium-bar. i used cohesive elements in the way, that i divided the bar into three parts, where the middle part is the very thin cohesive element. in the section i used cohesive->traction seperation->initial thickness->use analysis default. in the material section i used elastic type traction with the values for e-module an the two g-modules, for the damage criterion i used maxs damage with the values of predicted failure and for the damage evolution i used the fracture energy. in the first step i put pressure load on the front side with a ramped amplitude an then a second step for the wave to develop through the material. for the connection between the cohesive elements and the surrounding material i used tie constraints, where the slave is always the cohesive element. i meshed the surrounding material normal, and for the cohesive element, i used cohesive, btw both with the same size. the problem, which occured, is that the wave doesn't go trough the cohesive element an thus there is no effect to see. can you help me. i guess the problem is with the tie constraint or the mesh!
thanks