I work on nanoindentation with peridynamics theory. I used a sperical indenter on a very thin coating and I want to match my depth indentation with displacement of atoms just below indenter, so I need to change indenter parameter. But I have a problem with my K ( Parameter of indenter) because when I take a K too high, my curve Force/depth indentation isn´t anymore smooth as you can see it on the attached file ! And I checked atomic distribution but it´s completely normal without weird displacements of atoms ! So, I don´t know why it behaves like this. Do you have any idea or explainations ?
Indenter-K.docx (235 KB)