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4-3 Design Features - Shape and Material.notebook

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4­3 <strong>Design</strong> <strong>Features</strong> ­ <strong>Shape</strong> <strong>and</strong> <strong>Material</strong>.<strong>notebook</strong>March 04, 2013<strong>Material</strong>• <strong>Material</strong>s are chosen based on several consideraons – strength needed,environment, etc.• Composite materials use two different materials together so that the beneficialproperes of both may be used.o Concrete <strong>and</strong> iron rods – concrete is very strong when pushed, iron rodsare very strong when pulledo FiberglassFeb 25­11:35 AM<strong>Material</strong>• Layered materials (laminates) are used to create extra strength or to takeadvantage of mulple properes.o Juice boxes have a leak resistant inner layero Windshields have a plasc layer to resist shaering• Woven or knit materials are very flexible.o Newspaper (as we saw under the microscope)o ClothFeb 25­11:35 AM3

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