This paper primarily examines the shape of the indenter which canrestrain the crack growth in the other body indented. For the shapeof the contacting bodies, a punch with rounded apex indenting a halfplane is considered as an indenter and the indented bodyrespectively. Partial slip condition is assumed on the contact. Sincethe contact failure is due to the cyclic shear on the contact, thebehaviour of shear traction as well as the boundary of stick and slipregions is examined during the cycle. For analyzing the edge crack,the dislocation density function method is adopted to calculatestress intensity factors (SIFs). The period of crack opening as wellas the crack closure during the shear cycle are discussed.Suggestible punch shape for failure-resistance is discussed.
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