Hi all, To everyone whose the member of memstalk and A request to all of those who are working in Indian univ/research institute/engineering college/IIT I deparately need the book of " Flat and corrugated Diaphragm design Handbook" by M. D Giovanni, Mercel Dekker(publisher) In case the book is available in your library , please let me know. If any one of you can suggest me any other reference which deals with te same subject, I shall be indebted. I am specifically looking for the design book that deals with deflection equation of the diaphragms of different shapes. The "Theory of plates and shells" by timoshenko does deal with plates but not exactly with diaphargms. Can the expression for strain energy for large deflection with residual stress be solved with Matlab, if yes can anyone tell which method to be used. thanks for all help coming forth