I have been searching for a paper titled as "Nonlinear analysis of stress and strain in soils" by JM Duncan, CY Chang in Journal of the Soil Mechanics and Foundations Division, 1970. Does anyone has a copy of that paper? I need it for reference. Thank you so much
Yes I do have a copy of the paper, plus a part of the UC Berkley report by Duncan, Chang and Mabry in which the Bulk modulus formulation is discussed. I have the UC Berkeley report in PDF format. I can have one of my students the Duncan and Chang paper within the week. Just tell me to which email address I should send it to.