I am trying to model a one-dimensional test case consisting of a hyperelastic material. I am writing a code in Matlab. I'm a bit lost on how to define the test case in terms of boundary conditions, initial conditions, etc and what results to expect to obtain. I would appreciate it if you could lead me in the right direction as soon as possible. I was thinking of a just having a beam fixed at one end and stretched at the other end. Would that be about right? What is expected to happen in this case, that is different to elastic materials?