Most machines, structures and devices are designed and manufactured according to “Mechanical design”. This course deals with
the basic design concepts and technical skills used in “Mechanical design” on the basis of major subjects (“Mechanics of materials”,
“Kinematics of machine” and “Machine design & drawing”, etc.). Also, it covers the advanced technologies such as optimum design
supported by computer and composite materials. Through exercises arranged in each class, students will recognize the course
contents more clearly.
The aim of this course is to develop the ability for applying the basic design concepts and technical skills related to the
mechanical design to practical problems.
- To apply the properties of materials to strength design.
- To evaluate the strength design methods under various mechanical conditions.
- To apply the evaluation results of machine elements and machine motions to mechanical design.
- To apply the concepts of dimension, accuracy and machining to mechanical design.
| Class schedule | HW assignments (Including preparation and review of the class.) | Amount of Time Required | |
|---|---|---|---|
| 1. | Lecture guidance: ･Design in a broad sense and design in a limited sense ･Flow and main points of mechanical design |
Preparation of handout. Review of mechanical design & drawing and machine elements. |
60minutes |
| 2. | Evaluations of material properties: ･Material test ･Young’s modulus and Poisson’s ratio ･Yield stress, Tensile strength and Allowable stress ･Types of stress |
Preparation of handout. Review of stress-strain curve and definition of stress (mechanics of materials). |
60minutes |
| Answer the practice problems and prepare the report. | 110minutes | ||
| 3. | Strength evaluation (1): ･Brittle materials and ductile materials ･Elastic failure ･Bending stress in a beam |
Preparation of handout. Review of allowable stress, safety factor and bending of beam (mechanics of materials). |
60minutes |
| Answer the practice problems and prepare the report. | 110minutes | ||
| 4. | Strength evaluation (2): ･Simple material test ･Simple failure test by bending |
Review of material test (mechanics of materials). | 60minutes |
| Prepare the test report. | 120minutes | ||
| 5. | Strength evaluation (3): ･Mohr’s stress circle ･Principal stress and principal shear stress ･Fundamental design of shaft ･Elastic failure (Advanced) |
Preparation of handout. Review of Mohr’s circle (mechanics of materials). |
60minutes |
| Answer the practice problems and prepare the report. | 110minutes | ||
| 6. | Design of shaft: ･Design of shaft under bending and twisting, ･Moment of inertia of area and polar moment of inertia of area (Section modulus and polar section modulus) |
Preparation of handout. Review of bending and twisting of beam (mechanics of materials). |
60minutes |
| Answer the practice problems and prepare the report. | 110minutes | ||
| 7. | Concept of weight saving: ･Weight saving method ･Weight saving of swing arm ･Weight saving of a shaft under twisting |
Preparation of handout. | 60minutes |
| Answer the practice problems and prepare the report. | 110minutes | ||
| 8. | Midterm examination: Examination covers from class 1 to class 7. ･Comments and explanations for examination |
Review from class 1 to class 7. | 300minutes |
| 9. | Design of solid of revolution: ･Unbalance ･Critical speed of solid of revolution (rotation shaft) |
Preparation of handout. Review of resonance and dynamic balance (vibration engineering). |
60minutes |
| Answer the practice problems and prepare the report. | 110minutes | ||
| 10. | Concept of shape optimization: ･Beam and shaft of uniform strength ･Optimum design supported by computer (Constitutive law of growth, genetic algorithm approach) |
Preparation of handout. Review of stress in bar or beam (mechanics of materials) and drafting (machine design & drawing). |
60minutes |
| Answer the practice problems and prepare the report. | 110minutes | ||
| 11. | Treatment of structural reinforcement: ･Composite materials and its applications ･Composite beam and its strength |
Preparation of handout. Review of composite beam (mechanics of materials). |
60minutes |
| Answer the practice problems and prepare the report. | 110minutes | ||
| 12. | Treatment of bolt fastening: ･Tensile and shear strength of bolt ･Exercise relating to trigger of new products |
Preparation of handout. Review of dynamics of bolt and dimensional tolerance (kinematics of machine and machine element). |
60minutes |
| Answer the practice problems and prepare the report. | 120minutes | ||
| 13. | Fatigue design: ･Fatigue limit and fatigue strength ･Design based on fatigue strength |
Preparation of handout. Review of fatigue strength and failure accidents (mechanics of materials). |
60minutes |
| Answer the practice problems and prepare the report. | 110minutes | ||
| 14. | Final examination: Examination covers everything in this course. ･Comments and explanations for examination |
Review from class 1 to class 13. | 400minutes |
| Total. | - | - | 2650minutes |
| Midterm examination | Final examination | Reports | Total. | |
|---|---|---|---|---|
| 1. | 14% | 8% | 9% | 31% |
| 2. | 14% | 12% | 9% | 35% |
| 3. | 3% | 10% | 6% | 19% |
| 4. | 4% | 5% | 6% | 15% |
| Total. | 35% | 35% | 30% | - |
Students will be comprehensively evaluated based on midterm examination (35%), final examination (35%) and reports during
classes (30%).
Handout
References: K. Watanabe, “Zairyo rikigaku”, Baifukan Co., Ltd., Y.Hatamura, “Jissai no sekkei”, Nikkan Kogyo Shimbun Ltd. and Y. Hagiuwara, “Yokuwakaru Kikougaku”, Ohmsha Ltd.
References: K. Watanabe, “Zairyo rikigaku”, Baifukan Co., Ltd., Y.Hatamura, “Jissai no sekkei”, Nikkan Kogyo Shimbun Ltd. and Y. Hagiuwara, “Yokuwakaru Kikougaku”, Ohmsha Ltd.
Basic knowledge of mechanics of materials, kinematics of machine, machine design & drawing, machine element and vibration
engineering.
- 12:30~13:10 of Monday, anytime when I’m in my room, except for the special situation.
- Course that cultivates an ability for utilizing knowledge
Last modified : Wed Oct 17 06:22:15 JST 2018