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Ir. Yongky Permana, M.Eng
Mechanical Design Lab.Mechanical Engineering DepartmentFakultas Teknik– Universitas Indonesia
DTM FTUI Pemilihan Bahan dan Proses(Material Selection and Proces)
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Mechanical Design Lab.Mechanical Engineering DepartmentFakultas Teknik– Universitas Indonesia
DTM FTUI
• Performance characteristic of a material usually are express in 1. Physical Properties2. Mechanical Properties3. Thermal Properties4. Electrical Properties5. Chemical Properties
• Material Properties are the link between basic structure and composition of the material and the service performance
MATERIAL CHARACTERISTIC
Structure
Atomic Bonding
Crystal Structure
Defect Structure
Microstructure
Macrostructure
Material Properties
Service Performance
Stresses
Corrosion
Temperature
Radiation
Vibration
Material Science
Material Eng.
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Mechanical Design Lab.Mechanical Engineering DepartmentFakultas Teknik– Universitas Indonesia
DTM FTUI The Scope in Material Science
Material Science deals with the purpose of how
to improve material properties by controlling structure.
Material Engineering deals with the purpose of how
Optimize the use of material with certain properties to achieve
best service performance in the product’s design scope .
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Mechanical Design Lab.Mechanical Engineering DepartmentFakultas Teknik– Universitas Indonesia
DTM FTUI STRUCTURE Structure has dimension vary from atomic
dimension to macroscopic crack in a certain defect.
The most common methods of altering structure of a material are by1. Composition Control (Alloying)2. Heat Treatment3. Deformation Processing
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Mechanical Design Lab.Mechanical Engineering DepartmentFakultas Teknik– Universitas Indonesia
DTM FTUI Dimension of Material Structure
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Mechanical Design Lab.Mechanical Engineering DepartmentFakultas Teknik– Universitas Indonesia
DTM FTUI Relation between Failure Modes & Mechanical Properties
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Mechanical Design Lab.Mechanical Engineering DepartmentFakultas Teknik– Universitas Indonesia
DTM FTUI
Material Properties
Performance Specification is the basic functional requirements of the product. (from here the design parameter is developed)
Product Specification is a list of conditions under which the component or material of the design is purchased.
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Mechanical Design Lab.Mechanical Engineering DepartmentFakultas Teknik– Universitas Indonesia
DTM FTUI
Performance Characteristic
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Mechanical Design Lab.Mechanical Engineering DepartmentFakultas Teknik– Universitas Indonesia
DTM FTUI
Material Properties Other Properties that may be important to the
design are
Type of Test EnvironmentStress StateSpecimen Configuration
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Mechanical Design Lab.Mechanical Engineering DepartmentFakultas Teknik– Universitas Indonesia
DTM FTUI
Fatigue Properties
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Mechanical Design Lab.Mechanical Engineering DepartmentFakultas Teknik– Universitas Indonesia
DTM FTUI
PROBLEM Apakah yang dimaksud dengan properti
diatas tadi? Lakukan proses disain untuk kursi mulai
dari tuntutan konsumen yang kalian spesifikasikan berdasarkan pengalaman kalian sampai kepada sketsa konsep gambar rancangan kursi tersebut, sesuai langkah-langkah dalam proses desain yang ada.