Which of the following is an example of structural technology? Welding The pillars running through thisclassroon Gears on a bicycle Solar paneis
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- The unit melting energy for a certain sheet metal is 10J/mm^3 .The thickness of each of the two sheets to be spot-welded is = mm. To achive required strength, it is desired to form a weldnugget that is =7 mm in diameter and 3.5 mm thick. The weld duration will be set at 44 sec .If the electrical resistance between the two surfaces is 144 micro-ohms and only one half the electricity generated will be used to form the weld nugget Determine the minium current level required in this operationPlease explain each step briefly.Properties of areas of common shapes. INCLUDE ALL THE REFERENCE (LINKS)
- The properties of material is greatly determined by the atomic bonding of the material. Depending on the material type, various bonding could occur such as metallic, covalent or secondary bonding. With aid of diagram, describe the effects on the properties from bonding in term of the melting temperature, elastic modulus and thermal expansion.Fig. 9-Displays a metal plate that has been cut to shape. Assume the density of the material is uniform. (Note: a=1m,b=6m,c=3med=3m.) (a) The coordinate xcm.(b) The coordinate ycmA brass plug is to be placed in a ring made of iron. At 20°C, the diameter of the plug is 8.755 cm and that of the inside of the ring is 8.741 cm. They must both be brought to what common temperature in order to fit? Given : Required : Illustration: Solution: final answer:
- b) An I-beam made of 4140 steel is heat treated to form tempered martensite. It is then welded to a 4140 steel plate and cooled rapidly back to room temperature. During use, the I-beam and the plate experience an impact load, but it is the weld which breaks. What happened?The welding parameters to be used to butt weld a metal alloy are being evaluated. In order to set up the welding machine, the melting factor for the metal (f2) has to be determined. The welding machine can deliver 4000 watts of power and the heat transfer factor for the welding process (f1) is 0.9. The final weld bead consists of 8 0% filler metal and 40% parent metal. The melting temperature of the filler metal and the parent metal is the same 2540 deg F. The cross-sectional area of the weld bead is 0.5 sq inches. The rate at which filler metal is added to the weld is 1 cu inch per min. Conversion factor 1 Btu = 1055 J and 0 deg F = 460 deg R Calculate the melting factor.Your solution must contain an explanation and diagram. (Diagram mandatory)