VM178

VM178
2D Double Cantilever Beam Problem

Overview

Reference:	J.F. Mandell, et al. "Prediction of delamination in wind turbine blade structural details”. Journal of Solar Energy Engineering. (2003): 522-530.
Analysis Type(s):	Static (ANTYPE, 0)
Element Type(s):	2D Structural Solid Elements (PLANE182)
Input Listing:	vm178.dat

Test Case

A double cantilever beam is modeled with composite material. One end of the beam is fixed, and the other end is loaded with an external force of same magnitude but with opposite direction as shown in Figure 269: 2D End Notched Flexure Problem Sketch. G computation for the cracked tip is conducted for VCCT and compared against Equation 1 in the reference.

Figure 269: 2D End Notched Flexure Problem Sketch

Material Properties

Geometric Properties

Loading

E=210GPa

µ=0.3

L=100mm

a=60mm

h=5mm

b=1mm

P=10N

Analysis Assumptions and Modeling Notes

The problem is solved using 2D PLANE182 element with plain strain element behavior. The contact is defined between the cracks. The crack tip nodes and the number of paths surrounding the crack tip nodes are defined using CINT command. The plate is subjected to vertical loading in the middle. G values are computed for the crack tip node.

Results Comparison

	Target	Mechanical APDL	Ratio
G	0.201	0.192	0.955