The interfacial stress distribution between residual limb and prosthetic socket is very important for medical research.To measure the interfacial stress distribution

this paper presents an interfacial stress sensor for artificial skin application based on plate capacitance and PDMS hyper elastic material.It solves the problems of determining measurement range

sensor size

materials selection

mechanical design

electrode coupling and fabrication.The sensor is capable of measuring 0～220kPa compressive pressure and 0～70kPa shear stress simultaneously.An experiment is conducted to obtain the response data of the sensor to compressive pressure and shear stress.The transfer function and fitting curve of the sensor to compressive pressure and shear stress are giving according to the experiment data.