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Q. What is thermoplastic plastics?
These plastic soften under heat, harden on cooling, and can be resoften under heat. Thus, they retain their fusibility, solubility, and capability of being repeatedly shape. The mechanical properties of these plastics are rather sensitive to temperature and to sunlight and exposure to temperature may cause thermal degradation. Common thermoplastic plastics are: acrylics, poly tetra fluoro ethylene (PTFE), polyvinyl chlorides (PVC), nylons, polyethylene, polypropylene, polystyrene etc,
define the prandtl stress function
Q. A rectangular beam of 200 mm in breadth and 400 mm in depth is simply supported over span of 4m and carries distributed load of 10 KN/m. Find out the maximum bending stress in
Natur e of Bending Stress If the beam is not loaded, it will not bend as shown in the figure-a. But if the beam is loaded, it will bend as shown in the figure-b, whatever may
Calculate value of force: A 100N force that makes an angle of 45º with the horizontal x axis is to be replaced by the two forces, a horizontal force F and a second force
Stress-strain carves for ductile materials: A material is said to be ductile in nature, if it elongates before fracture. One this type of material is mild steel. Shape of stre
Copper Alloys Some alloys of copper are employed in industry for varying causes. Copper forms alloys along with zinc or the brasses, tin or the bronzes, along with tin and pho
#question.I am doing a ,ini project on Hovercrafts .As i am from mechanical i need assistance regarding control over brushless motors.
A steel rod of 3 cm diameters and 5 m long is connected to two grips and the rod is maintained pull exerted when the temperature falls to 30 o C if (a) The ends do not yield, an
To design a cantilevered truss to support the loads shown in the figures, two layouts are proposed as shown in Figs. A and B. All truss members are steel with allowable stress of 2
Torsional equation for circular shaft
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