Issues of Direct Application of Fracture Toughness Determination Procedures to Coupled Composite Laminates

Analysis of the Influence of Mechanical Couplings in Laminate Beams on the Adherence of the Assumed Boundary Conditions in the DCB Test Configuration

“…For delamination analysis Virtual crack closure technique (VCCT) was used. As fracture criterion the Reeder Law has been chosen [3]:…”

Experimental Study on Static and Dynamic Fracture Toughness of Cured Epoxy Resins

“…The finite elements (FE) simulations of the fracture toughness test configurations prior to the physical experiments are helpful and could be an invaluable source of knowledge. The example of such a modeling method is the virtual crack closure technique (VCCT) [11,12].…”

Comparison of Different Methods for Determination of Delamination Initiation Point in the DCB Test on Coupled CFRP Composite Laminates

“…Such tests are standardized by the ASTM organization (see the ASTM D5528 Standard [2]), where different calculation methods are described. In the available literature, there are some papers addressing to delamination resistance problem for the FRP laminates taking into account the influence of fiber misorientation at delamination interface [3][4], as well as the effect of the mechanical coupling [5][6][7][8][9][10][11][12] on the critical strain energy release rate (c-SERR). One of the problems with precise determination of the mode I c-SERR may be fiber bridging phenomena.…”