TY  - EJOU
AU  - Chen, X.-H.  
AU  - Mai, Y.-W.  

TI  - On essential work of fracture method: theoretical consideration and numerical simulation
T2  - The International Conference on Computational \& Experimental Engineering and Sciences

PY  - 2010
VL  - 14
IS  - 2
SN  - 1933-2815

AB  - A general elastoplastic fracture mechanics theory is proposed for applying the Essential-Work-of-Fracture (EWF) Method to quasi-static and impact toughness characterization. Advanced finite element modeling is developed to simulate the EWF Method using the crack-tip opening angle criterion (CTOA) and the constitutive relation of the material under consideration. For Poly(ethylene-terephlate) (PET) films, the load-displacement curves are calculated for the whole crack propagation process of deeply double-edge notched tensile specimens (DENT) with different ligament lengths so as to determine the total work, the essential work and the non-essential work of fracture. The effects of specimen gauge length and ligament length on crack growth stability are also discussed in combination with experimental results.
KW  - Essential Work of Fracture Method
KW  -  Finite Element Modeling
KW  -  Crack Propagation
KW  -  Elastoplastic Fracture Mechanics

DO  - 10.3970/icces.2010.014.043