Hi All, I am working on boss membrane where aim is to calculate the piezoresistive co-eff of Si. I have a boss membrane of 4mm * 4mm. Very close to boss are my four resistors on Silicon. The length of the membrane is 6mm and width is 4mm. I need formula for stress, strain so that I can calculate piezoresistive co-eff by applying force on the boss and measuring the change in resistance. If anyone knows anything regarding this please send me the information. Thanks, Arti a.tibrewala@tu-bs.de