Fatigue Failure Predictions for Complicated Stress-Strain Histories

reportActive / Technical Report | Accession Number: AD0736583 | Open PDF

Abstract:

A cumulative damage procedure is developed to predict the fatigue failure of engineering metals subjected to complicated stress-strain histories. Histories with plastic strainings and cycles not completely reversed in stress are considered. The relationship between stress-strain behavior and fatigue life is investigated for unnotched axially loaded specimens for which the stresses and strains can be measured for the duration of all tests. Since either the stress history or the strain history was known before each test was conducted, the other could be estimated and a life prediction made. A general cumulative damage procedure is used to make life predictions for a wide variety of complicated history tests on 2024-T4 aluminum.

Author(s):
Dowling, N. E.
Author Organization(s):
ILLINOIS UNIV AT URBANA DEPT OF THEORETICAL AND APPLIED MECHANICS
Supplementary Note:
Continuation of Contract N156-46083 and N00156-67-C-1875. DOI: 10.21236/AD0736583
Pagination:
0088

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

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

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
T/AM-337, UILU-ENG-71-6001
Contract/Grant Number(s):
N00156-70-C-1256
Monitor Series:
NADC
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_1_Force Support; JCA_6.4.1_Secure Information Exchange; JCA_6_Net Centric; JCA_1.2.5_Lessons Learned; JCA_1.3_Human Capital Management; JCA_6.4_Information Assurance
Communities of Interest:
Air Platforms
Descriptor(s):
*ALUMINUM ALLOYS, *FATIGUE(MECHANICS), LIFE EXPECTANCY(SERVICE LIFE), FAILURE(MECHANICS), PREDICTIONS, STRAIN(MECHANICS), METALS, STRESSES
Field(s)/Group(s):
Metallurgy and Metallography
Keyword(s):
ALUMINUM ALLOY 2024
Report Date:
1970 Jan 01