Cumulative-strain-damage model of ductile fracture: simulation and prediction of engineering fracture tests

Technical Report · Fri Oct 03 00:00:00 EDT 1980

DOI:https://doi.org/10.2172/6628920· OSTI ID:6628920

Wilkins, M L; Streit, R D; Reaugh, J E

A cumulative-strain-damage criterion is used to predict the initiation and propagation of fracture in ductile materials. The model is consistent with a model of ductile rupture that involves void growth and coalescence. Two- and three-dimensional finite difference computer codes, which use incremental-plasticity theory to describe large strains with rotation, are used to trace the history of damage in a material due to external forces. Fracture begins when the damage exceeds a critical value over a critical distance and proceeds as the critical-damage state is reached elsewhere. This unified approach to failure prediction can be applied to an arbitrary geometry if the material behavior has been adequately characterized. The damage function must be calibrated for a particular material using various material property tests. The fracture toughness of 6061-T651 aluminum is predicted.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Science Applications, Inc., San Leandro, CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6628920
• Report Number(s): UCRL-53058
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
FRACTURE PROPERTIES
FRACTURE MECHANICS
METALS
COMPUTERIZED SIMULATION
CRACK PROPAGATION
DUCTILITY
FINITE DIFFERENCE METHOD
PLASTICITY
STRAIN HARDENING
ELEMENTS
HARDENING
ITERATIVE METHODS
MECHANICAL PROPERTIES
MECHANICS
NUMERICAL SOLUTION
SIMULATION
TENSILE PROPERTIES
360103* - Metals & Alloys- Mechanical Properties