周 结构材料 强度 韧性 The strength of a material is Toughness is the ability of a its ability to withstand an material to absorb energy and applied load without failure. plastically deform without fracturing. energy stress o=F/A = a de volume yield fracture X non-linear area o=f(E) linear area O=EE strain E > 材料科学与工程学院 9 School of Materials Science and Engineering材料科学与工程学院 School of Materials Science and Engineering 结构材料 9 • The strength of a material is its ability to withstand an applied load without failure. 强度 • Toughness is the ability of a material to absorb energy and plastically deform without fracturing. 韧性