After passing the elastic limit (point A in Fig. The book incorporates material properties, engineering, processing, design, applications and sustainable and bio based solutions. prescription bottles. stress (perform like a plastic) B= Yield strength (point B in fig. a) – The maximum engineering stress before rupture – Different from the true stress due to … Items such as disposable coffee cups, plastic food boxes, plastic cutlery and packing foam are made from PS. 2 2.008 spring 2004 S. Kim excerpt from Prof. J. Greene, CSU 7 Medical Plastics and Composites Use Containers Bottles, bags Drug delivery IV bags, syringes tubing and tools for surgery Implants, artificial skins The use of plastic materials in the medical field, about 4 billion dollars in … Concurrent Engineering • ~ Simultaneous Engineering • A systematic approach integrating the design and manufacture of the products with the view toward optimizing all elements involved in the life cycle of the product • Basic goal • Minimize design and manufacture changes • Minimize time and cost in taking the product from conceptual design to production 5 emg 2201 engineering materials lecture notes. This is termed a plastic hinge, and is the basis for plastic analysis. •ABS is often used as the cost and performance dividing line between standard plastics (PVC, polyethylene, polystyrene, etc.) Plastic analysis is the method through which the actual failure load of a structure is calculated, and as will be seen, this failure load can be significantly greater than the elastic load capacity. Note that once the plastic moment capacity is reached, the section can rotate freely – that is, it behaves like a hinge, except with moment of P M at the hinge. Further increases in b, line OC = the offset, line BC is parallel to OA Ultimate strength (see in fig. Ideal for those just entering the industry, or transitioning between sectors, this is a quick, relevant and informative reference guide to plastics engineering and processing for engineers and plastics practitioners. and engineering plastics (acrylic, nylon, acetal, etc.). Textbook: 8.1.1), the material “gives” and is said to undergo plastic flow. YEAR 2 BSc. Plastic bottle caps are often made from PP. Code 7 is used to designate miscellaneous types of plastic … In the elastic range the force-displacement behaviour for most engineering materials (metals, rocks, plastics, but not soils) is linear. Polystyrene is commonly recycled, but is difficult to do. MECHANICAL/MARINE ENGINEERING 2014/15 SEM I LECTURER MR. J. MUTUA 1 Heat treatment of plain carbon steels Surface Hardening Toughness of a materials decreases as hardness and strength increases. b) – Stress that will induce permanent set (an offset to the original length) – In fig. University of Babylon, College of Engineering , Engineering Materials, Maithem H-Rasheed Figure 1.2 Application of the tetrahedron of materials science and engineering to sheet steels for automotive chassis. Tests: pledged, closed-book and closed-notes Grading: W. D. Callister & D. G. 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