8.1.1), the material “gives” and is said to undergo plastic flow. Tests: pledged, closed-book and closed-notes Grading: W. D. Callister & D. G. Rethwisch, Materials Science and Engineering: An Introduction (John Wiley 2010, 8th edition) I will also post my lecture notes on the web. 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. Polystyrene is commonly recycled, but is difficult to do. 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. 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. 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. 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 … The book incorporates material properties, engineering, processing, design, applications and sustainable and bio based solutions. Further increases in stress (perform like a plastic) B= Yield strength (point B in fig. b) – Stress that will induce permanent set (an offset to the original length) – In fig. prescription bottles. 5 emg 2201 engineering materials lecture notes. Code 7 is used to designate miscellaneous types of plastic … Items such as disposable coffee cups, plastic food boxes, plastic cutlery and packing foam are made from PS. Textbook: At the plastic hinge This is termed a plastic hinge, and is the basis for plastic analysis. and engineering plastics (acrylic, nylon, acetal, etc.). •ABS is often used as the cost and performance dividing line between standard plastics (PVC, polyethylene, polystyrene, etc.) b, line OC = the offset, line BC is parallel to OA Ultimate strength (see in fig. 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. After passing the elastic limit (point A in Fig. •ABS plastics generally possess medium strength and performance and medium cost. In the elastic range the force-displacement behaviour for most engineering materials (metals, rocks, plastics, but not soils) is linear. Note that the microstructure-synthesis and processing-composition are all interconnected and affect the performance-to-cost ratio Plastic bottle caps are often made from PP. a) – The maximum engineering stress before rupture – Different from the true stress due to … YEAR 2 BSc. 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