Plastic flow of porous materials in friction contact area
Tóm tắt
The paper considers the instantaneous stress-strain state in an infinite hollow porous plastic cylinder subjected to simultaneous radial compression and twisting by shear stresses applied to the cylinder surface. It is assumed that the cylinder material obeys a cylindrical yield criterion and associated flow rule. The asymptotic behavior of the equivalent strain rate near the maximum friction surface is studied. It is shown that the distribution of this quantity follows the inverse square root rule near the maximum friction surface. It is noted that the same dependence is observed in the case of incompressible perfect rigid-plastic material. The strain rate intensity factor is found and is compared to that derived from the corresponding perfect rigid-plastic solution.
Tài liệu tham khảo
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