Mechanical APDL Structural Analysis Guide

prci,1

!

set,1,4

plnsol,s,1

!

finish

/post26

nsel,s,loc,y,dh/2

nsel,r,loc,x,0

*get,ntop,node,0,num,max

nsel,all

nsol,2,ntop,u,y,uy

rforce,3,ntop,f,y,fy

prod,4,3, , ,rf, , ,20

/title,, dcb: reaction at top node verses prescribed displacement

/axlab,x,disp u (mm)

/axlab,y,reaction force r (n)

/yrange,0,60

xvar,2

prvar,uy,rf

prvar,2,3,4

/com,

finish

12.1.5. VCCT Crack Growth Simulation Assumptions

VCCT-based crack growth simulation is available only with current-technology linear elements PLANE182
and SOLID185.

The following assumptions apply to VCCT-based crack growth simulation:

• The material is linearly elastic, and can be isotropic, orthotropic, or anisotropic.


• The analysis is assumed to be quasi-static. Although a transient analysis is possible, the fracture calculations
  do not account for the transient effects.


• The VCCT-based mixed-mode energy-release rat es calculation assumes that the crack tip field / deformation
  at the crack tip/front location is similar to when the crack ext ends by a small amount. This assumption
  does not apply when crack growth approaches the boundary or when two cracks are close; therefore, use
  the VCCT calculation with care and examine the analysis results.

12.2. Modeling Interface Delamination with Interface Elements

A set of four interface elements is available for modeling interface delamination at the interface of two
materials. The elements are capable of representing the cohesive zone between the interface and can
account for the separation across the interface.

The following related topics are available:
12.2.1. Analyzing Interface Delamination
12.2.2. Interface Elements
12.2.3. Material Definition
12.2.4. Meshing and Boundary Conditions
12.2.5. Solution Procedure and Result Output
12.2.6. Reviewing the Results

Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information

Modeling Interface Delamination with Interface Elements