Fundamental study of crack initiation and propagation. [Computer model of ductile fracture]

Conference · Wed Dec 21 00:00:00 EST 1977

OSTI ID:5005858

Norris, Jr, D M; Reaugh, J E; Moran, B; Wilkins, M L

Objective is to determine the fracture toughness of A533B-1 steel by computer modeling Charpy V-notch tests. A computer model of ductile fracture was developed that predicts fracture initiation. The model contains a set of material-dependent parameters obtained by computer simulations of small specimen tests. The computer calculations give detailed stress and strain histories up to the time of fracture, which are used to determine the model parameter values. The calibrated fracture model, that correctly predicts fracture initiation (and initiation energy) in the Charpy specimen, may then be used to simulate tests of accepted fracture-toughness specimens and hence obtain fracture toughness. The model parameters were calibrated to predict fracture in four different test specimens: two different notched-tension specimens, a simple tension specimen, and a precracked compact-tension specimen. The model was then used in a computer simulation of the Charpy V-notch specimen to initiate and advance a flat fracture. Results were compared with interrupted Charpy tests. Calibration of the model for two additional heat treatments of A533B-1 steel is in progress.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5005858
• Report Number(s): UCRL-80478; CONF-780207-1; TRN: 78-010714
• Resource Relation: Conference: Electric Power Research Institute, plastic fracture public information meeting, Palo Alto, CA, USA, 14 Feb 1978
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
FRACTURE PROPERTIES
PRESSURE VESSELS
STEEL-ASTM-A533
CALIBRATION
CHARPY TEST
CRACKS
DUCTILITY
MATERIALS TESTING
MATHEMATICAL MODELS
SIMULATION
ALLOYS
CONTAINERS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
STEELS
TENSILE PROPERTIES
TESTING
360103* - Metals & Alloys- Mechanical Properties
420500 - Engineering- Materials Testing