✦ LIBER ✦

Research note on quasi-convexity of the yield function and its relation to Drucker's postulate

✍ Scribed by Alberto Franchi; Francesco Genna; Ferdinando Paterlini

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 350 KB
Volume: 6
Category: Article
ISSN: 0749-6419
DOI: 10.1016/0749-6419(90)90008-3

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✦ Synopsis

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 domain on the assumption of Drucker's postulate; the second one which follows the inverse path. A link role is played by the concept of quasi-convexity of the yield function.