machine design i ch1

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Machine Design I (254325)Chapter 1

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M,Th 9:30-11:45

Room 310


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Introduction

1. Design

2. Mechanical Engineering Design3. Phases and Interactions of the Design Process

Design Considerations

4. Design Tools and Resources Computational Tools

Aquiring Technical Information

5. The Design Engineerings ProfessionalResponsibilities

6. Standards and Codes


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Introduction

7. Economics

8. Safety and Product Liability9. Stress and Strength

10. Uncertainty

11. Design Factor and Factor of Safety12. Reliability

13. Dimensions and Tolerances

14. Units15. Calculations and Significant Figures

16. Case Study


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n = S/

n = S =

=


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Computational Tools

Computer-aided design (CAD)

Computer-aided engineering (CAE)

Acquiring Technical Information

Libraries

Government sources

Professional societies Commercial vendors

Internet


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The Design Engineers Professional

Responsibilities

Assignment


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Aluminum Association (AA)

American Gear Manufacturers Association (AGMA)

American Institute of Steel Construction (AISC) American Iron and Steel Institute (AISI)

American National Standards Institute (ANSI)

ASM International

American Society of Mechanical Engineers (ASME)

American Society of Testing and Materials (ASTM) American Welding Society (AWS)

American Bearing Manufacturers Association (ABMA)

British Standards Institution (BSI)

Industrial Fasteners Institute (IFI)

Institution of Mechanical Engineers (I. Mech. E.)

International Bureau of Weights and Measures (BIPM)

International Standards Organization (ISO)

National Institute for Standards and Technology (NIST)

Society of Automotive Engineers (SAE)


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Variations in properties from place to place within a bar of stock.

Effect of processing locally, or nearby, on properties.

Effect of nearby assemblies such as weldments and shrink fits onstress conditions.

Effect of thermomechanical treatment on properties.

Intensity and distribution of loading.

Validity of mathematical models used to represent reality.

Intensity of stress concentrations.

Influence of time on strength and geometry.

Effect of corrosion. Effect of wear.

Uncertainty as to the length of any list of uncertainties


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Reference

Budynas, R.G. and Nisbett, J.K., Shigleys

Mechanical Engineering Design, 8th ed.,McGraw Hill, 2008.

machine design i ch1

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