Accession Number:

ADA183388

Title:

Defects, Constitutive Behavior and Continuum Toughness Considerations for Weld Integrity Analysis.

Descriptive Note:

Memorandum rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

• Matic,Peter
• Jolles,Mitchell I.

Report Date:

1987-07-21

Pagination or Media Count:

22.0

Abstract:

The failure load of a butt welded T-frame with a lack of fusion defect is predicted and compared with experimental data. Energy density concepts are used to quantitatively describe the material toughness at the continuum scale. Particular attention is given to the determination of base metal and weld metal uniaxial stress-strain curves valid for large deformation. Finite element results are used to predict the location where the energy density first reaches a critical value, and the corresponding applied load. The predicted initiation site and load compares favorably with the experiment. Keywords Weld defects, Fracture, Energy density, True stress-true strain curve.

Descriptors:

• *FAILURE(MECHANICS)
• *TOUGHNESS
• *WELDS
• *STRESS STRAIN RELATIONS
• BASE METAL
• DEFECTS(MATERIALS)
• DEFORMATION
• DENSITY
• DETERMINATION
• ENERGY
• EXPERIMENTAL DATA
• FINITE ELEMENT ANALYSIS
• LOADS(FORCES)
• MATERIALS
• SCALE

Subject Categories:

• Couplers, Fasteners and Joints

Distribution Statement:

APPROVED FOR PUBLIC RELEASE