mesh free

Hello IMechanicans,

 I am interested in modelling shear response to mechanical stress at the interface of a two layer matrial e.g. the skin of the human hand, where the superficial layer of tissue slides over the deeper layer, while retaining some sort of attachment to it. 

Does anyone know of any research papers that have investrigated this topic? I would rather base my work on the advances made my others, instead of reinventing the wheel.

Thanks,

- Olumide