First published in 1950, this important book details the mathematical theory underlying the behaviour of plastic materials, especially metals. 'the author has done his work so well that it is difficult to see how it could be bettered. The book should rank for many years as an authoritative source of reference.' Engineering 'In the reviewer's opinion this book should be in the possession of all those who wish to undertake study and research in the theory of plasticity' Mathematical Gazette 'the many examples in the book relating to the shaping of metals should be of considerable value ... The book is well-written ... and a pleasure to read.' J.F. Nye in Research