Bennewart Flex Tester is intended to determine the resistance of a component of material to cut growth under repeated flexing. It can also be used to assess the effect of surface patterns on crack initiation and growth.
This test is especially applicable to the outsoles of footwear, but may also be used with certain other flexible components.
DIN 53543 1979 : Testing of Semi Rigid Polyurethane (PUR) Integral Cellular Materials Materials for Soles and Parts of Shoes.
SATRAPM161 : Bennewart Flex Test Resistance to Cut Growth on Flexing.