Wear of Homogeneous and Composite Materials under Conditions of Repeated Normal and Sliding Impact.
CONNECTICUT UNIV STORRS INST OF MATERIALS SCIENCE
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This report describes experimental and analytical investigations in the area of wear of materials under repetitive impulsive and sliding contact. Both pin-on-disc and impact wear test machines have been utilized in conducting experiments involving solid contact between specimen and counterface materials. The report includes a description of experimental methodology employed in research in wear, and enumerates the considerations relevant to a given experiment. Further noted are the deterministic external variables which serve to define operative wear regimes and processes. These variables include velocity, stress, test duration, environment and the effective mechanical stiffness of the specimencounterface contact. Specific experimental results which illustrate phenomenologically distinct wear behaviors which arise due to differing levels in external variables are highlighted. The importance of these findings to further research in impact and sliding wear is noted. Analytical work has focused on the determination of states of stress and strain in material specimens undergoing repetitive impact. In particular, a bar striking an elastic half-space and a cylinder contacting a moving, rough, rigid plane were studied in some detail. These analytical results are applicable to the study of in situ material processing during wear, and to the formation of subsurface zones arising both in impact and sliding wear. Author
- Laminates and Composite Materials