Introduction to Engineering-Materials 2.1 Stress-Strain Curve ■Test specimen “dog bone?”specimen Materials Testing Machine ■Tensile test process A specimen is clamped by two jaws Jaws are gradually pulled apart during the test,placing the specimen in tension Shanghai Jiao Tong University 5 Introduction to Engineering H.ShaoIntroduction to Engineering Introduction to Engineering —— Materials Materials Shanghai Jiao Tong University Shanghai Jiao Tong University Introduction to Engineering Introduction to Engineering H. Shao 5 2.1 Stress-Strain Curve “dog bone” specimen  Test specimen  Materials Testing Machine  Tensile test process  A specimen is clamped by two jaws  Jaws are gradually pulled apart during the test, placing the specimen in tension