ENB215 Fundamentals of Mechanical Design Week 2.docx

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Queensland University of Technology
Negareh Ghasemi

ENB215 Lecture Fundamentals of Mechanical Design Engineering Design The set of decision making process and activities used to determine the form of an object given the functions desired by the customer. Utilize knowledge and methods from the basic sciences, mathematics and engineering to predict or simulate the performance of each alternative before it is built, avoiding time and expenses. Design Process is influenced by Principles of universal design – Development of product for people with different abilities and ages  Safety  Ecological considerations System approach to design – interaction of humans with  Society machines: styling and ergonomics Mechanical Engineering Design Design of things and systems of a mechanical nature:  Machines, products, structures, devices, instruments It utilises mathematics, material science, mechanics, and thermal and fluid science. PAG-PAU Problem As it Given-Problem As it Understood Clearly define the problem – specifications should be written Specifications are Input and Output quantities, characteristics and dimensions of the space, limitations of these:  Speed, feeds, temperature, max range, expected variation, dimensional and weight limitations Constraints  Labour, competitors, freedom of choice of materials e.g. aluminium conductor, diagonal pipe line, bus bar materials. Feasibility Study Is it possible to develop the product within  Time frame  Resources Preliminary Design Analysis and optimisation for performance complies with specifications. If failed, design procedure must begin again (iterations) Based on optimised design  Detailed design is developed  Prototype is built and evaluated  Evaluation – final proof  Should be completed in a laboratory Hidden component – Presenting your project  Selling job, succeeds in profession  Written, oral and graphical Factors influencing design  Function  Size, weight  Quantity Generally these factors do  Ease of handling  Operating cost  Delivery date no exist seperately, they  Maintenance  Environmental  Safety must be considered  Overhaul protection  Reliability collectively to ensure the  Materials  Product liability  Life, Fatigue, Creep synthesis of several  Manufacturing  Climatic effect  Appearance knowledge areas. process  Freedom from noise  Mechanical loading 1 Week 2 Tuesday, 27 August 2013 ENB215 Lecture Fundamentals of Mechanical Design Sustainable Design Four key aspects of Sustainable design Sphere of influence Product Concept 1. Design processes Distribution Disposal 2. Methods and tolls Production Use 3. Knowledge Management Acquisition of Raw Point of Purchase 4. Philosophy and Decision Making Material Approaches to lessening environmental impact 1. Design for recycl
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