Crack behavior for sliding contact problems

✍ Scribed by Ghorbanpoor Al; Zhang Jiping

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 712 KB
• Volume: 41
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(92)90093-t

✦ Synopsis

Ahatraet-A finite element analysis to simulate the behavior of cracks for the problem of contact with asperities in sliding wear is presented in this article. The results of the analysis show that due to the presence of a tensile stress field between the asperities, mode I fracture is active below the free surface and the tensile stress maxima are obtained near the trailing edge of each contacting asperity. The magnitudes of stress intensity factors increase with increasing friction forces. For a surface crack perpendicular to the contact surface, the stress intensity factor Ki reaches its maximum value at a depth very close to the surface and the crack propagates in a direction opposite to the motion of the slider. Similar results are found for an embedded crack. The current analysis may facilitate further exploration of the wear mechanism by fracture mechanics.