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| Course Description |
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| Course Name |
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Machine Elements I |
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| Course Code |
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ME 351 |
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| Course Type |
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Compulsory |
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| Level of Course |
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First Cycle |
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| Year of Study |
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3 |
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| Course Semester |
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Fall (16 Weeks) |
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| ECTS |
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4 |
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| Name of Lecturer(s) |
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Prof.Dr. NECDET GEREN
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| Learning Outcomes of the Course |
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Knows machine design process and its steps.
Applies factor of safety and Knows safety philosophy and applies it in design.
Determines the stresses and defeclections on machine members subjected to single, 3D or combined loading.
Knows static and fatigue failure theories and applies these to design machine members to prevent failures resulting from static or variable loading.
Designs shafts and shaft components considering both deflection and stresses. Determines limits and fits for mating parts.
Designs power screws for various needs.
Selects suitable fasteners for all types of connections.
Designs nonpermanent joints subjected to static and variable loading with preload.
Selects the suitable connections for permanent joints.
Designs and analysis permanent joints made using arc and resisting welding, bonding etc.
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| Mode of Delivery |
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Face-to-Face |
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| Prerequisites and Co-Prerequisites |
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None |
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| Recommended Optional Programme Components |
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Those who did not take static and strength are advised to not to take this lecture. |
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| Aim(s) of Course |
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The main aim of this lecture is to teach the basics of machine design, including the design process, failure prevention under static and variable loading. |
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| Course Contents |
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1-Introduction to Mechanical Engineering Design
2-Materials
3 Load and Stress analysis
4 Deflection and Stiffness
5 Failures resulting from static loading
6 Fatigue Failures resulting from variable loading
7 Shafts and Shaft Components
8 Screws, Fasteners and the Design of Non permanent Joints
9 Welding, Bonding, and the Design of permanent joints
10 Mechanical springs
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| Language of Instruction |
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English |
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| Work Place |
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Classroom |
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Course Outline /Schedule (Weekly) Planned Learning Activities |
| Week | Subject | Student's Preliminary Work | Learning Activities and Teaching Methods |
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1 |
INTRODUCTION, The meaning of Design, Mechanical Engineering Design, The Phases of Design, |
Shigley´s book (Referans Book) Chapter 1 |
Hand outs are provided for the phases of mechanical eng. Design. 1. week lecture presentations |
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2 |
Design Considerations, Factor of safety, Codes and Standards, Economics, Reliability, Safety and Product Liability, Units, Rules for Use of SI Units |
Shigley´s book (Referans Book) Chapter 1 |
2. week lecture presentations, and example machine projects are shown. |
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3 |
MATERIALS; LOAD AND STRESS ANALYSIS Determination of Stress Concentration Factors, Stress concentration Charts, stress concentration and static loads |
Study Chapters 2, 3, and 4. in Shigley´s book (Referans book). Some axamples are gieven as homework. |
Chapters 2, 3 and 4 are summarised. |
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4 |
DESIGN FOR STATIC STRENGTH; Static strength,stress concentration, Failure theories, Maximum normal stress theory, Maximum shear stress theory, Distortion energy theory |
Shigley´s book (Referans Book) Chapter 5 |
4. week lecture presentations, and example problem solutions. |
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5 |
Coulomb-Mohr theory, Maximum-Normal-stress theory for brittle materials, modification of the Mohr theory, failure of brittle materials, Selection of failure criteria |
Shigley´s book (Referans Book) Chapter 5 |
5. week lecture presentations, and example problem solutions. |
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6 |
Introduction to Fracture Mechanics, Stress State in a Crack, Critical Stress Intensity Factor, Fracture Toughness Factors, example problem solutions |
Shigley´s book (Referans Book) Chapter 5, homework |
6. week lecture presentations, and example problem solutions. |
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7 |
DESIGN FOR FATIGUE STRENGTH; Introduction, Approach to fatigue failure in analysis and design, Fatigue llife methods, The endurance limit, |
Shigley´s book (Referans Book) Chapter 6 homework |
7. week lecture presentations, and example problem solutions. |
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8 |
The endurance limit, fatigue strength, endurance limit mod. Factors, stress concentration and notch sensitivity |
Shigley´s book (Referans Book) Chapter 6 homework |
8. week lecture presentations, and example problem solutions. |
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9 |
Characterizing fluctuating stresses, fatigue failure criteria for fluctuating stress, Torsional fatiue strength, Stress due to combined loading, Cumulative fatigue damage, Surface fatigue strength |
Shigley´s book (Referans Book) Chapter 6, homework assigment |
9. week lecture presentations, and example problem solutions. |
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10 |
SHAFT AND SHAFT COMPONENTS; Shaft materials, shaft layout, Shaft design for stress, Deflection considerations,Critical speeds for shafts, Misc. Shaft components, limits and fits |
Shigley´s book (Referans Book) Chapter 7, homework assigment and the term project |
10. week lecture presentations, and example problem solutions. |
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11 |
MIDTERM EXAM |
Repeat the sections including the last chapter, grasp the teories and approaches, solve problems. |
Design and analysis problems are asked. |
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12 |
THE DESIGN OF SCREWS, FASTENERS, AND CONNECTIONS; Thread Standards and Definitions
The Mechanics of Power Screws, Threaded Fasteners, Joints-fasteners stiffness, joints member stiffness, Bolt strength |
Shigley´s book (Referans Book) Chapter 8, homework assigment |
12. week lecture presentations, and example problem solutions. |
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13 |
Tension joints, Relating bolt torque to bolt tension, statically loaded tension joints with preload, Gasketed joints, Fatigue loading of tension joint |
Shigley´s book (Referans Book) Chapter 8, homework assigment |
13. week lecture presentations, and example problem solutions. |
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14 |
Bolted and Riveted Joints Loaded in Shear, Example problem solutions, |
Shigley´s book (Referans Book) Chapter 8, homework assigment |
14. week lecture presentations, and example problem solutions. |
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15 |
WELDED BRAZED AND BONDED JOINTS; Welding, Butt and Fillet welds, Streses in welded joints in Torsion, Streses in welded joints in Bending, The Strength of welded joints, Static and fatigue loading, Resistance welding, Bonded joints |
Shigley´s book (Referans Book) Chapter 9, Homework assignment |
15. week lecture presentations, and example problem solutions. |
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16/17 |
Final Exam |
Prepare yourself for final exam |
Design and analysis problems are asked. |
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Required Course Resources |
| Resource Type | Resource Name |
| Recommended Course Material(s) |
 Shigley´s Mec. Eng. Design R. G. BUDYNAS, J. K. NISBETT 9 th SI Edition
Fundamentals of Machine Elements B.J. HAMROCK
Engineering Design, George E. Dieter, L.C. Schmidt, Mc-Graw Hill, 5th edition
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| Required Course Material(s) | |
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Assessment Methods and Assessment Criteria |
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Semester/Year Assessments |
Number |
Contribution Percentage |
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Mid-term Exams (Written, Oral, etc.) |
1 |
60 |
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Homeworks/Projects/Others |
5 |
40 |
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Total |
100 |
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Rate of Semester/Year Assessments to Success |
40 |
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Final Assessments
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100 |
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Rate of Final Assessments to Success
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60 |
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Total |
100 |
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| Contribution of the Course to Key Learning Outcomes |
| # | Key Learning Outcome | Contribution* |
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1 |
Students gain a command of basic concepts, theories and principles in mechanical engineering |
5 |
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2 |
Student become equipped with the basic knowledge of math, science and engineering |
5 |
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3 |
Students are able to design and carry out experiments in the basic fields of mechanical engineering, and interpret the results and the data obtained from the experiments |
1 |
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4 |
Students become equipped with a variety of skills and knowledge regarding engineering techniques |
4 |
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5 |
Students are able to design a system, component or process in order to meet the needs of various engineering problems within technical, economic, environmental, manufacturability, and sustainability limits. |
5 |
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6 |
Students independently review and learn the applications in an enterprise, make a critical assessment of the problems faced with, formulate problems and propose solutions by selecting the proper technique |
5 |
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7 |
Students take initiative in identification, design, development and use of a product or production process. |
5 |
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8 |
Students become aware of the necessity of lifelong learning and continuously self-renew |
2 |
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9 |
Students use English effectively for technical or non-technical topics orally or in wirtten form. |
5 |
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10 |
Students become effective in using computer, computer-aided drafting, design, analysis, and presentation |
1 |
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11 |
Students have good communicatino skills with a tendency to work in teams, and are able to work effectively as a member of an interdisciplinary team |
1 |
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12 |
Students become aware of the technical and ethical responsibilities, as well as being inquisitive and innovative |
2 |
| * Contribution levels are between 0 (not) and 5 (maximum). |
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| Student Workload - ECTS |
| Works | Number | Time (Hour) | Total Workload (Hour) |
| Course Related Works |
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Class Time (Exam weeks are excluded) |
14 |
3 |
42 |
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Out of Class Study (Preliminary Work, Practice) |
14 |
3 |
42 |
| Assesment Related Works |
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Homeworks, Projects, Others |
5 |
2 |
10 |
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Mid-term Exams (Written, Oral, etc.) |
1 |
2 |
2 |
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Final Exam |
1 |
2 |
2 |
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Total Workload: | 98 |
| Total Workload / 25 (h): | 3.92 |
| ECTS Credit: | 4 |
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