Investigation of Tension-Compression Fatigue Behavior of a Unidirectional Metal Matrix Composite at Elevated Temperature.

reportActive / Technical Report | Accession Number: ADA289394 | Open PDF

Abstract:

This study investigated the fatigue behavior in a unidirectional metal matrix composite under tension-compression loading conditions. Stress-strain responses, modulus and strain trends were monitored to characterize damage. Fractography and microscopy were used to characterize failure modes. Fatigue life curves were plotted base on different parameters such as stress and strain. Tension-compression fatigue life was shorter than the obtained under tension-tension fatigue cycling. Creep, observed in tension-tension. fatigue cycling, and the effects of the compressive load on the plastic zone around the crack tip explain shorter life under tension-compression fatigue loading.

Author(s):
Kraabel, Darren L.
Author Organization(s):
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
Descriptive Note:
Master's thesis,
Pagination:
0101

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFIT/GAE/ENY/94D-6
Monitor Series:
AFOSR
 Subject Terms
Joint Capability Areas:
JCA_3_Force Application; JCA_5.3_Planning; JCA_5_Command and Control; JCA_3.1_Maneuver; JCA_3.1.1_Maneuver to Engage; JCA_3.1.2_Maneuver to Insert; JCA_1_Force Support; JCA_1.3_Human Capital Management; JCA_1.3.2_Personnel Management; JCA_8_Building Partnerships
Modernization Areas:
Microelectronics
Communities of Interest:
Air Platforms
Descriptor(s):
*AIRCRAFT, *METAL MATRIX COMPOSITES, *FATIGUE(MECHANICS), COMPRESSION, STRESS STRAIN RELATIONS, FATIGUE LIFE, HIGH TEMPERATURE, TENSILE STRESS, STIFFNESS, CRACKING(FRACTURING), FIBER REINFORCED COMPOSITES, THESES, STRENGTH(MECHANICS), MICROSCOPY, FRACTOGRAPHY, BUCKLING, CREEP, FAILURE(MECHANICS), CYCLIC LOADS, UNIDIRECTIONAL
Field(s)/Group(s):
Aircraft, Laminates and Composite Materials
Keyword(s):
CRACK TIPS, FIBER BRIDGING, COMPRESSIVE LOADING
Report Date:
1994 Dec 01