MACHINE ELEMENTS 1 INTRODUCTION * Materials Processing and Design Teknik Mesin, Universitas Gunadarma 07/16/96 MACHINE ELEMENTS INTRODUCTION 1 * ##

Outline: Introduction Introduction to Mechanical Engineering Design Materials Processing and Design Teknik Mesin, Universitas Gunadarma Outline: Introduction Introduction to Mechanical Engineering Design Materials Load and Stress Analysis Deflection and Stiffness Shafts and Shaft Components Screws, Fasteners, and the Design of Nonpermanent Joints Welding, Bonding, and the Design of Permanent Joints Mechanical Springs Rolling−Contact Bearings

Materials Processing and Design Teknik Mesin, Universitas Gunadarma Referensi: Khumi and Gupta . Theory of Machine Element. New Delhi : Eurasin Publishery. Spott, MF, Design of Machine Elemen, Tokyo: Prentice Hall 1973 Hacl, AS & Holowenko AR. Machine Design, New York: Mc Graw Hill, 1977 Gustaf Nieman : Machine Element, Design and Calcution, Vol I & II, Springer Verlag. Phelan : Fundamental of Mechanical Design, Mc Graw Hill. Sularso, Dasar Perencanaan dan Pemilihan Elemen Mesin, Jakarta: Pradya Paramita 1983 Ir. Jac. Stolk, Ir. C. Kros : Elemen Mesin , Erlangga, Jakarta : 1984

INTRODUCTION Introduction to Mechanical Engineering Design Materials Materials Processing and Design Teknik Mesin, Universitas Gunadarma INTRODUCTION Introduction to Mechanical Engineering Design Materials Load and Stress Analysis Deflection and Stiffness

DESIGN DASAR-DASAR PERANCANGAN MEKANIS: Perancangan elemen tunggal Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design DESIGN DASAR-DASAR PERANCANGAN MEKANIS: Perancangan elemen tunggal Assembly komponen BIDANG-BIDANG PERANCANGAN PRODUK MEKANIS Produk Konsumen: mixer, gergaji rantai, vacuum cleaner, dll Sistem manufakturing: konveyor, derek, robot-robot industri, dll Peralatan konstruksi: truk sampah, traktor, kompresor, dll

Phases and Interactions of the Design Process * Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design 07/16/96 Phases and Interactions of the Design Process Functionality Strength/stress Distortion/deflection/stiffness Wear Corrosion Safety Reliability Manufacturability Utility Cost Friction Weight Life Noise Styling Shape Size Control Thermal properties Surface Lubrication Marketability Maintenance Volume Liability Remanufacturing/resource recovery * ##

Design Tools and Resources * Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design 07/16/96 Design Tools and Resources Computational Tools Engineering software Non-engineering software Match software Acquiring Technical Information Libraries (community, university, and private). Government sources. Professional societies. Commercial vendors Internet * ##

The Design Engineer’s Professional Responsibilities * Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design 07/16/96 The Design Engineer’s Professional Responsibilities Understand the problem Identify the known Identify the unknown and formulate the solution strategy State all assumptions and decisions Analyze the problem Evaluate your solution Present your solution DESIGN ENGINEER Active member of a professional society Courses Reading technical and professional journals AN ENGINEER’S EDUCATION DOES NOT END AT GRADUATION * ##

Standards and Codes Introduction to Mechanical Engineering Design Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design Standards and Codes 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)5 ASM International American Society of Mechanical Engineers (ASME) American Society of Testing and Materials (ASTM) American Welding Society (AWS) American Bearing Manufacturers Association (ABMA)7 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)8 Society of Automotive Engineers (SAE)

Economics Standard Sizes Large Tolerances Breakeven Points * Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design 07/16/96 Economics Standard Sizes Large Tolerances Breakeven Points Cost Estimates * ##

Examples of uncertainties concerning stress and strength include: * Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design 07/16/96 Uncertainty Examples of uncertainties concerning stress and strength include: Composition of material and the effect of variation on properties. 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 on stress 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. * ##

Dimensions and Tolerances Materials Processing and Design Teknik Mesin, Universitas Gunadarma Introduction to Mechanical Engineering Design Dimensions and Tolerances Nominal size. Limits. Tolerance Bilateral tolerance Unilateral tolerance. Clearance. Interference Allowance