Crack Development in Liner Using Caginalp Phase Field Model

The interface between stump and liner (socket) is subject of high pressure in different moments of gait cycle due to loading variation in body movement. The liner is the interface between socket and skin along with soft tissue and bones in a cycling loading. The result is a friction effect combined with pressure that conduct to the heating of skin and liner. The effect is and increasing of pressure and friction and the increasing the temperature again, in a cascading cycle than can conducts to fracture of liner and scars on stump. There are models that describe the fracture development and prediction of crack propagation but in the last years, an increased attention is given to phase field models applied to fracture development as a better solution for analysis of fracture in different materials of composites. A simplified approach that uses Caginalp model with memory is used to predict the fracture of liner under cycling loading. The numerical results of simulations are presented as outcomes of the theoretical approach.