Prediction of Classical Fracture Initiation Toughness
Abstract
Initiation of crack growth in ductile materials has long been a concern to the manufacturing and design community. The current analysis considers a definition of fracture at the continuum scale to determine the onset of fracture. The strain energy density associated with fracture at the continuum scale is used as the fracture criterion. The critical strain energy density and the scale invariant continuum stress-strain curve were determined from a hybrid computational-experimental analysis of the deformation of a series of tensile tests performed on cylindrical specimens of HY-100 steel. Computational simulation of fracture initiation in a compact specimen of HY-100 steel containing a crack was performed using two- and three-dimensional nonlinear finite element techniques and continuum toughness concepts. Predicted values of classical fracture toughness parameters are within 3.5 percent of experimentally determined values. Fracture, Strain energy, Damage criteria.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 11, 1988
- Accession Number
- ADA201636
Entities
People
- G. C. Kirby Iii
- M. I. Jolles
- V. G. Degiorgi
Organizations
- United States Naval Research Laboratory