Distortion Energy Theory : Failure theory defined by the following equation where the applied stresses are positive for tension and negative for compression. (Bul 2U, 2V) F2: fa f0 + f2 + F2 A 0 y
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}