Users:General FEM Analysis/Materials Reference/Puck Failure Criterion

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* Fibre Fracture (FF)
 
* Fibre Fracture (FF)
 
* Inter Fibre Fracture (IFF)
 
* Inter Fibre Fracture (IFF)
 +
 +
=== Parameter Description ===
 +
 +
{| border="1" cellpadding="3" cellspacing="0"
 +
|colspan="3" style="background:#efefef;"| Compulsory Parameters
 +
|-
 +
!Parameter
 +
!Values, Default(*)
 +
!Description
 +
|-
 +
!EF
 +
|real
 +
|Elasticity modulus of the fibres
 +
|-
 +
!RTL
 +
|real
 +
|Resistance to longitudinal tension (Direction 1)
 +
|-
 +
!RCL
 +
|real
 +
|Resistance to longitudinal compression (Direction 1)
 +
|-
 +
!RTT
 +
|real
 +
|Resistance to transverse tension (Direction 2)
 +
|-
 +
!RCT
 +
|real
 +
|Resistance to transverse compression (Direction 2)
 +
|-
 +
!RSL
 +
|real
 +
|Resistance to longitudinal shear
 +
|-
 +
!VFF
 +
|real
 +
|Volume fraction of the fibres
 +
|-
 +
!PTTL
 +
|real
 +
|Inclination parameter, p
 +
|-
 +
!PCTL
 +
|real
 +
|Inclination parameter, p
 +
|-
 +
 
 +
|colspan="3" style="background:#efefef;"| Optional Parameters
 +
|-
 +
!Parameter
 +
!Values, Default(*)
 +
!Description
 +
|-
 +
!STRESS TYPE
 +
|2D, 3D
 +
|Indicates what kind of stress state should be used to calculate the failure condition. When not given, related element’s stress type is taken.
 +
|-
 +
!NUE12F
 +
|real
 +
|Poisson’s ratio for fibres. (De f ault = 0.2)
 +
|-
 +
!MGF 
 +
|real
 +
|Amplification factor (De f ault = 1.2)
 +
|-
 +
!S, M 
 +
|real
 +
|Parameters necessary for calculation of weakening due to _1. (De f ault = S = M = 0.5)
 +
|-
 +
!PTT
 +
|real
 +
|Inclination parameter p??. When not given, calculated using the strength values. See Section 3.1.2.3
 +
|-
 +
!WEAKENING
 +
|int
 +
|Switch for calculation of weakening due to _1.
 +
* 0 = OFF
 +
* 1* = ON
 +
|-
 +
!FPS
 +
|SWS*, GSS
 +
|Switch for fracture plane search algorithm.
 +
* SWS* = Stepwise Search Algorithm
 +
* GSS = Golden Section Search Algorithm
 +
|-
 +
!FPS_SWS_SIZE
 +
|real
 +
|Step size for step-wise fracture plane search
 +
|-
 +
|-
 +
|}

Revision as of 08:59, 8 February 2013

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)

Parameter Description

Compulsory Parameters
Parameter Values, Default(*) Description
EF real Elasticity modulus of the fibres
RTL real Resistance to longitudinal tension (Direction 1)
RCL real Resistance to longitudinal compression (Direction 1)
RTT real Resistance to transverse tension (Direction 2)
RCT real Resistance to transverse compression (Direction 2)
RSL real Resistance to longitudinal shear
VFF real Volume fraction of the fibres
PTTL real Inclination parameter, p
PCTL real Inclination parameter, p
Optional Parameters
Parameter Values, Default(*) Description
STRESS TYPE 2D, 3D Indicates what kind of stress state should be used to calculate the failure condition. When not given, related element’s stress type is taken.
NUE12F real Poisson’s ratio for fibres. (De f ault = 0.2)
MGF real Amplification factor (De f ault = 1.2)
S, M real Parameters necessary for calculation of weakening due to _1. (De f ault = S = M = 0.5)
PTT real Inclination parameter p??. When not given, calculated using the strength values. See Section 3.1.2.3
WEAKENING int Switch for calculation of weakening due to _1.
  • 0 = OFF
  • 1* = ON
FPS SWS*, GSS Switch for fracture plane search algorithm.
  • SWS* = Stepwise Search Algorithm
  • GSS = Golden Section Search Algorithm
FPS_SWS_SIZE real Step size for step-wise fracture plane search




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