16 Jul WHAT IS THE MAXIMUM LOAD A CABLE OF FLICKER IS ABLE TO CARRY BEFORE ONE COMPONENT OR THE OTHER BEGINS TO YIELD?
i attached 3 problems for mechanics of material Document Preview: Please, draw an outline around your answer to each part. Figure 1. Cross section of an aluminum conductor, steel supported (or core) (ACSS or ACSC) high tension line. Aluminum provides electrical conductivity and steel supplies strength. (1) The figure above shows the cross section of an aluminum conductor, steel supported (ACSS) high tension (tension means voltage in this usage) line known in the trade as flicker. The steel core consists of seven wires that are each 0.094inches in diameter and may be aluminum clad for corrosion resistance. This steel has a yield strength of 900MPa. The aluminum conductor consists of 24 wires each 0.141inches in diameter of annealed soft pure aluminum. The assembly weighs about 605lbf/1000feet. As wound on a spool the cable is stress free at 25?C. However, once installed on a set of pylons conductors like this carry a large mechanical load in tension to keep them from sagging. What is the maximum load a cable of flicker is able to carry before one component or the other begins to yield? What would be the partition of load carried in the steel versus that in the aluminum at this point? Assume that the strands in the cable do not slip against one another. At this maximum load how close is each material to failing through yield? In other words, what is the implied safety factor of each? 1st gear 6.4:1 2nd gear 3.09:1 3rd gear 1.69:1 4th gear 1:1 Reverse 7.82:1 Table 1. Gear ratios for the F5 Four speed manual transmission. First gear for example produces one rotation of the driveline for each 6.4 engine rotations. Figure 2 shows a Ford F5 truck. Any farm kid of my age drove one like it as a youngster. The engine would produce 110hp and 200ft -lbf of torque maximum. The manual transmission had gear ratios as in table 1. Assume maximum torque to start a heavy load in reverse. Assume the outer diameter of the drive shaft, which lies beyond the transmission toward the rear differential, is 4inches. Placement of… Attachments: h.w.docx
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