Fatigue Life Design of Mechanical Structure答案2023秋

第六章测试

1. The incorrect statement is （ ）
A:Brittle material: the notch effect is more pronounced at short lives B:Geometric discontinuities cause stress concentration C:Notched fatigue strength only depends on the stress concentration factor D:The characteristic length depends on the material
答案:C
2. Three principle parameters in Haigh diagram contain （ ）
A:Net regional mean stress B:Nominal stress amplitude C:Notch factor D:Tensile strength 3. The description of Neuber’s rule is as follows （ ）
A:The most widely used model B:Related strain-stress curve is a hyperbola C:Plane stress situation D:Plane strain situation 4.null
A:对 B:错 5. The notched fatigue strength maybe a greater fraction of the smooth fatigue strength. （ ）
A:错 B:对