87年 - 87 淡江大學轉學考工程力學#56394

科目：轉學考-工程力學 | 年份：87年 | 選擇題數：0 | 申論題數：5

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所屬科目：轉學考-工程力學

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申論題 (5)

【已刪除】1- Find the longitudinal strain on the upper surface of the cantilever beam at point A as shown in Figure 1. Use 9.0xl0⁶ lb/in² for the modulus of elasticity. (20%)

【已刪除】2. The solid steel shaft AB is to be used as a torsion bar. Bar BC is a rigid horizontal member. Specifications require that a 2500 pound force P at C is to cause no more than a 0.9 inch vertical deflection of point C as shown in Figure 2-1, Find the minimum required diameter of the bar AB. Bearing will ensure that the bar AB will be in pure torsion. Use 12 xl0⁶ Ib/in² for the modulus of rigidity. Hint: As shown in Figure 2-2, what is φ? ( 20%)

【已刪除】3. Find the centroid of the semicircle (arc) as shown in Figure 3. (20%)

【已刪除】4. The struts BF and ED in Figure 4 are connected to the continuous member AC by ball-and-socket joints. The resultant force on the two wheels is 50

kN. Find the force magnitude in either strutXtheir magnitudes being equal by symmetry) (20%)

5. Explain the difference between a truss amd a frame. (20%)