Users:General FEM Analysis/Materials Reference/Puck Failure Criterion
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+ | F < 1 : no fracture | ||
+ | F = 1 : fracture limit reached and fracture occurs | ||
+ | F > 1 : fracture limit exceeded | ||
+ | with F [0,) | ||
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Revision as of 07:52, 15 February 2013
Contents |
General Description
It is based on Mohr‘s fracture hypothesis which is appropriate for brittle fracture behaviour of composite materials. It can distinguish between fibre fracture and different inter-fibre fracture. Both 2D and 3D formulations are implemented into Carat++. Available fracture modes for 2D Puck Criterion are:
- Fibre Fracture (FF)
- Inter Fibre Fracture Mode A (IFF A)
- Inter Fibre Fracture Mode B (IFF B)
- Inter Fibre Fracture Mode C (IFF C)
Available fracture modes for 3D Puck Criterion are:
- Fibre Fracture (FF)
- Inter Fibre Fracture (IFF)
Stresses on the Fracture Plane
Strength Analysis
In order to judge if a stress vector on the stress spce is leading to damage, a mathematical expression is needed. This expression is called fracture condition an is written as the following general form:
Ri. : Strengths under corresponding stresses
F : Fracture function
There are 6 main strengths that should be related to the occurring stress state:
F < 1 : no fracture F = 1 : fracture limit reached and fracture occurs F > 1 : fracture limit exceeded with F [0,)
Parameter Description
Example of a Complete Input Block
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