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二填空1 在弹性变形阶段,应力、应变服从虎克定律,在拉伸时σ=E·ε,扭转时τ=______,E和G分别为_______弹性模量和______弹性模量,单位________.2 工程上,弹性模量是度量材料_______的系数或表征金属材料对_________的抗力.3 弹性变形的特点:变形是_______,在加载或卸载期内应力与应变之间保持________关系.其最大应变范围一般不超________过%.4金属材料应变硬化指数n反映了金属材料抵抗______的能力,是表征金属材料________的性能,对于理想弹性体n=________,对于理想塑性体n=______,大多数金属材料n=________.5韧性是金属材料断裂前吸收________功和_______功的能力,或指材料抵抗________的能力,
In the phase of elastic deformation, stress and strain obey Hooke’s law, σ = E · ε when stretched, τ = ______ when twisted, E and G are respectively _______elastic modulus and ______elastic modulus , Unit ________. 2 Engineering, the elastic modulus is a measure of the material _______ coefficient or characterization of metal materials _________ resistance .3 elastic deformation characteristics: deformation is _______, during loading or unloading stress and Strain between the ________ relationship between the maximum strain range is generally not over ________% .4 The strain hardening index of metallic materials n reflects the ability of metal materials to resist ______, is the performance of metallic materials ________ performance, For the ideal elastomer n = ________, for the ideal plastic body n = ______, most of the metal material n = ________. 5 toughness is the ability of metal materials to absorb ________ work and _______ work before fracture, or refers to the material resistance _______ _Ability,