Research note on quasi-convexity of the
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Alberto Franchi; Francesco Genna; Ferdinando Paterlini
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Article
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1990
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Elsevier Science
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English
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The relations between the inequality expressing Drucker's postulate, the convexity of the admissible stress domain (yield surface) and the quasi-convexity of the yield function are examined. A formal, analytical proof is given of two theorems: the first one, which states the convexity of the yield d