Engineering Fracture Mechanics

reportActive / Technical Report | Accession Number: ADA222699 | Open PDF

Abstract:

On the basis of the Dugdale model, approximate weight-function procedures for crack analysis, and a crack-opening shape criterion for continuing crack growth, theoretical curves for tearing resistance were derived for thin flat sheets of finite size. The substantial effects of finite specimen size and initial tearing resistance were thereby revealed. This work was extended to circumferential cracks in cylindrical shells subjected to bending for which crack growth resistance curves. The singular fields around the tips of growing cracks in linear-hardening materials were calculated for a variety of conditions. The actual magnitude of the singularity strength was also calculated, for steady crack growth, as a function of the applied stress- intensity factor and strain-hardening of the material.

Author(s):
Budiansky, Bernard
Author Organization(s):
HARVARD UNIV CAMBRIDGE MA DIV OF APPLIED SCIENCES
Descriptive Note:
Final rept. 5 Jun 1984-30 Sep 1989
Pagination:
0005

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
N00014-84-K-0510
 Subject Terms
Joint Capability Areas:
JCA_5.3_Planning; JCA_5_Command and Control
Communities of Interest:
Air Platforms
Descriptor(s):
*CRACK PROPAGATION, STRESS CONCENTRATION, MATERIALS, RESISTANCE, CRACKS, STRAIN HARDENING, SHELLS(STRUCTURAL FORMS), FRACTURE(MECHANICS), ENGINEERING, CYLINDRICAL BODIES, SHEETS, STRENGTH(GENERAL), THINNESS, TEARING, STEADY STATE, SIZES(DIMENSIONS)
Field(s)/Group(s):
Mechanics
Report Date:
1989 Sep 30