 For his fundamental contributions to plasticity and to shell theory, he was awarded the Timoshenko Medal by the ASME in 1980, which justly placed his name on the list of the top engineering scientists of this century.He was made an honorary member of the ASME in 1983, and a member of the National Academy of Engineering in 1984.In 1986, he was awarded the Eringen Medal of the Society of Engineering Science in 1986.