Engineering Transactions, 31, 3, pp. 317-330, 1983

The Terms and Shapes of the Functions Necessary for Calculation of the Dissipated Power in the Problem of Indentation of a Punch Into a Two-Ply Material

J. Kaczorowski
Institute of the Foundations of Machine Constructions, Kraków

The paper presents a method of calculation of the majorant of the limit load for the example of a punch into a semispace consisting of an isotropic laminar material. Proving the validity of the suggested theorems and lemma for a selected class of strain types, the calculation of the minimum dissipated power has been significantly simplified. The problem of finding the minimum of the func­tional has been reduced to the search for the minimum of a function of a single variable.

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