Almost all engineering softwares nowadays offer nonlinear inelastic solution capabilities of different natures. It depends on the purpose of your analysis, whether it is for design or stress-deformation related work. STAAD3, for instance, has the capability of solving a structural problem iteratively to account for progressive changes in the structural configuration, and to my knowledge, the material response is always assumed elastic. Other softwares however, such as LUSAS, ANSYS and many others, offer a wide range of material and structural nonlinearities either independently or coupled. <p>azmi ibrahim<br><a href=mailto:azmi@civil.engr.itm.edu.my>azmi@civil.engr.itm.edu.my</a><br><a href= > </a><br>I'm always keen to learn more to advance<br>
myself in areas that I'm interested in.