2024知到答案 Fatigue Life Design of Mechanical Structure 完整智慧树网课章节测试答案
绪论 单元测试
1、单选题：
Excess deformation is （ ）
选项：
A:Stress corrosion cracking
B:High energy absorption
C:Little plasticity
D:The most common failure mode
答案: 【The most common failure mode】
2、多选题：
The correct statement of fatigue includes （ ）
选项：
A:Loading, uni/multi-axial loading
B:Repeated loading
C:Crack nucleation/growth
D:Constant or variable amplitude
答案: 【Loading, uni/multi-axial loading;
Repeated loading;
Crack nucleation/growth;
Constant or variable amplitude】
3、多选题：
The contribution of August Wöhler is as follows （ ）
选项：
A:Fatigue limit
B:Corrosion fatigue
C:Multiple fatigue
D:S-N Curve
答案: 【Fatigue limit;
S-N Curve】
4、判断题：
Failure due to fatigue, i.e. repeated loading, is the most common cause of mechanical failure. （ ）
选项：
A:对
B:错
答案: 【对】
5、判断题：
Proper fatigue design includes synthesis, analysis and testing. （ ）
选项：
A:对
B:错
答案: 【对】
第一章 单元测试
1、单选题：
The characteristics of fail-safe design is （ ）
选项：
A:Expected maximum load or stress occur occasionally
B:If one part fails, the system does not fail
C:The oldest criterion
D:Fracture mechanics analysis and tests
答案: 【If one part fails, the system does not fail】
2、多选题：
Four kinds of possible design situations are as follows （ ）
选项：
A:Model design
B:Product design
C:Design to standard
D:Equipment design
答案: 【Model design;
Product design;
Design to standard;
Equipment design】
3、多选题：
The main points of damage tolerance design are as follows （ ）
选项：
A:Minimum detectable crack size
B:Slow crack propagation
C:High fracture toughness
D:Anti-crack measures
答案: 【Minimum detectable crack size;
Slow crack propagation;
High fracture toughness;
Anti-crack measures】
4、判断题：
Analysis needs to be confirmed by tests. （ ）
选项：
A:错
B:对
答案: 【对】
5、判断题：
Allowable service life should be less than test or calculated life. （ ）
选项：
A:对
B:错
答案: 【对】
第二章 单元测试
1、单选题：
Which is not the characteristic of slip （ ）
选项：
A:The same characteristics under monotonic loading and cyclic loading
B:The relationship between dislocations and plastic deformation
C:A shear deformation of the metal
D:Occurring within individual grains by dislocation movement
答案: 【The same characteristics under monotonic loading and cyclic loading】
2、多选题：
The characteristics of beach mark are as follows （ ）
选项：
A:Wavy bands
B:Pattern of crack growth
C:Crack’s starting, stopping and growing at different rates
D:Two adjacent crack surfaces with open, close, and rub
答案: 【Wavy bands;
Pattern of crack growth;
Crack’s starting, stopping and growing at different rates;
Two adjacent crack surfaces with open, close, and rub】
3、多选题：
Modes of fatigue crack growth with fracture are as follows （ ）
选项：
A:Trans-crystalline fracture
B:Slip deformation
C:Inter-crystalline fracture
D:Dislocation movement
答案: 【Trans-crystalline fracture;
Inter-crystalline fracture】
4、判断题：
Crack nucleate at surface and grow across several grains (stage I, microcrack), and then to grow in a zigzag manner (stage II, macrocrack). （ ）
选项：
A:对
B:错
答案: 【对】
5、判断题：
The mechanical property of each grain is the same. （ ）
选项：
A:错
B:对
答案: 【错】