尔雅Fundamentals of Mechanical Design_1课后答案(学习通2023完整答案)
24 min read尔雅Fundamentals of Mechanical Design_1课后答案(学习通2023完整答案)
Chapter 1--introduction--homework
1、尔雅Select a mechanical component from Part 3 of this 课后book (roller bearings, springs, etc.), go to the Internet, and, using a search engine, report on the information obtained on five manufacturers or suppliers.
Chapter 2---Kinematics fundamentals
Chapter 2---Homework
1、Please see the attached.
Chapter 3--Linkages
Chapter 3--Homework
1、答案Please see the attached.
Chapter 4---Failure and Prevention
Chapter4---Bearing failure-Homework
1、学习review design equations (stress calculation) on Mechanics of materials.
Chapter5---Shaft
Chapter 5-Shaft--Homework
1、通完Please check the attached.
Chapter 6 Bearing
Chapter 6--Bearing--Homework
1、整答Please see the attached ducument (PPT version)
Chapter 7--Gears
Chapter 7---Gears--Homework
1、尔雅Please check the attached documents.
Chapter 8--Cam
Chapter 8--Cam--Homework
1、课后Please see the attached document
Chapter 9--Joint
Chpater 9--Homework
1、答案Please check the attached document
Chapter 10--Belt and Chain
Chapter 10--Belt and Chain--Homework
1、学习Please Compare belt drive,通完 chain drive and gear drvie.
Final Exam
Fundamentals of Mechanical Design--Final exam 1
1、The整答 sewing machine is . A．double-rocker mechanism B．double crank mechanism C．crank-rocker mechanism
A、A
B、尔雅B
C、课后C
D、答案D
2、The life of ball rolling bearing is FL = constant,, for roller bearings, α= . A．1 B．3 C．1/3 D．10/3
A、A
B、B
C、C
D、D
3、A pair of spur gear，the surface durability stress of driver gear and driven gear are sH1 and sH2, the surface durability stress . A．sH1 > sH2 B．sH1 < sH2 C．sH1 = sH2
A、A
B、B
C、C
D、D
4、is an inherent physical phenomenon in belt transmission, and it is inevitable. A. Creep B. Slip C. Loose D. Fatigue
A、A
B、B
C、C
D、D
5、The condition of continuous transmission of a pair of involute gears is that contact ratio ε should be . A. ε≥1 B. ε≥2 C. ε≤1 D. ε≥1.3
A、A
B、B
C、C
D、D
6、In belt drive, the tension stress of the belt is as follows . A. invariant B. regularly changing C. irregular D. equal to zero
A、A
B、B
C、C
D、D
7、Condition of self-lock for screw is . A. lead angle ≤ equivalent frication angle B. lead angle ≤ frication angle C. lead angle ≥ frication angle D. lead angle ≥ equivalent frication angle
A、A
B、B
C、C
D、D
8、The pressure angle at locked point for four-link mechanism is . A. 0 B. 90° C. 0~45° D. 45°~90°
A、A
B、B
C、C
D、D
9、Pressure angle at each point of involute curve is . A．= B．≠ C．≠ 0 D．= 0
A、A
B、B
C、C
D、D
10、Pressure angle at the base circle is . A．= B．≠ C．≠ 0 D．= 0
A、A
B、B
C、C
D、D
11、A pair of spur gear，z1=18, z2=72, Lewis bending stress . A. B. C. D. Uncertain
A、A
B、B
C、C
D、D
12、The place of the maximum stress of belt is . A. Small pulley--slack side B. Small pulley--tight side C. Big pulley--slack side D. Big pulley--tight side
A、A
B、B
C、C
D、D
13、The considerations of design have . A .Cost B. Reliability C. Quality D. cover A.B and C
A、A
B、B
C、C
D、D
14、The meshing conditions of gears are . A. Modules are same B. pressure angles are same C.Both modules and pressure angles are same D. Numbers of teeth are same
A、A
B、B
C、C
D、D
15、For a single bearing, the probability of reaching or exceeding its expected life is only . A.70% B. 80% C. 90% D. 100%
A、A
B、B
C、C
D、D
16、The design is an innovative and highly iterative process.
17、The gear train can change speed and direction.
18、The tension pulley of V-belt should be placed in the inner of the slack side and close to the small pulley as far as possible.
19、When the belt drive works normally, the accurate transmission ratio can not be guaranteed because the belt is easy to slip on the pulley.
20、The internal and external threads used together have the same helix.
Fundamentals of Mechanical Design--Final exam 2
1、Please see the attahced document which contains 6 questions.
