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Golchin, A. (author), Vardon, P.J. (author), Coombs, William M. (author), Hicks, M.A. (author)This paper presents a new Modified Cam Clay (MCC) type yield function, that is designed for robust and efficient use with implicit stress integration algorithms. The proposed yield function attains non-elliptical (e.g. tear and bullet) shapes, as well as the typical elliptical shape of the MCC model. Like that of MCC, and unlike most other...journal article 2021