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Show that if E is assumed correct, an error of 1% in the determination of G will involve an error of about 5% in the calculation of Poisson’s ratio when its correct value is XXXXXXXXXXOR 2. A steel...

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Show that if E is assumed correct, an error of 1% in the determination of G will involve an error of about 5% in the calculation of Poisson’s ratio when its correct value is XXXXXXXXXXOR 2. A steel tube 2.4 cm external diameter and 1.8 cm internal diameter encloses a copper rod 1.5 cm diameter to which it is rigidly joined at each end. If, at a temperature of 100C there is no longitudinal stress, calculate the stresses in the rod and tube when the temperature is raised to 2000C. Es = 21 x 104 N/mm2 , Ec = 10x104 N/mm2 , coefficient of linear expansion as =11x10-6 / 0C, c = 18 x 10-6 / 0C 12 UNIT-II 3. A horizontal beam AD, 10 m long, carries a uniformly distributed load of 360 N/m run, together with a concentrated load of 900 N at the left hand end A. The beam is supported at B, 1 m from A, and at C, which is the right hand half of the beam, x m from D. Determine the value of x if the mid point of the beam is a point of inflexion. Plot BM diagram 12 OR 4. A horizontal beam simply supported on a span of 10 m carries a total load of 1000 kg. The load distribution varies parabolically from zero at each end to a maximum at mid span. Calculate the maximum BM, shearing force at quarter span 12 UNIT-III 5. A hollow steel cylinder 20 cm external diameter, 10 cm internal diameter acting as a beam is subjected to a shearing force F perpendicular to the axis. Determine the mean stress and the average shearing stress at the neutral axis and at 25 mm from neutral axis as a fraction of the mean value 12 OR 6. Two beams, particulars of which are given below, are simply supported at the ends over equal spans and carry central loads to give the same maximum bending stress. Determine the ratio of maximum shear stress in the webs

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[A-11] [EURME 404] B.Tech. DEGREE EXAMINATION Mechanical Engineering IV SEMESTER MECHANICS OF SOLIDS-I (Effective from the admitted batch 2008–09) Time: 3 Hours XXXXXXXXXXMax.Marks: 60 ------------------------------------------------------------------------------------- Instructions: Each Unit carries 12 marks. XXXXXXXXXXAnswer all units choosing one question from each unit. XXXXXXXXXXAll parts of the unit must be answered in one place only. XXXXXXXXXXFigures in the right hand margin indicate marks allotted. --------------------------------------------------------------------------------------------- UNIT-I 1. Show that if E is assumed correct, an error of 1% in the determination of G will involve an error of about 5% in the calculation of Poisson’s ratio when its correct value is XXXXXXXXXX OR 2. A steel tube 2.4 cm external diameter and 1.8 cm internal diameter encloses a copper rod 1.5 cm diameter to which it is rigidly joined at 0 each end. If, at a temperature of 10 C there is no longitudinal stress, calculate the stresses in the rod and tube when the temperature is XXXXXXXXXX raised to 200 C. E = 21 x 10 N/mm , E = 10x10 N/mm , s c XXXXXXXXXX coefficient of linear expansion a =11x10 / C, = 18 x 10 / C XXXXXXXXXX s c UNIT-II 3. A horizontal beam AD, 10 m long, carries a uniformly distributed load of 360 N/m run, together with a concentrated load of 900 N at the left hand end A. The beam is supported at B, 1 m from A, and at C, which is the right hand half of the beam, x m from D. Determine the value of x if the mid point of the beam is a point of inflexion. Plot BM diagram XXXXXXXXXX12OR 4. A horizontal beam simply supported on a span of 10 m carries a total load of 1000 kg. The load distribution...

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Answered Same Day Dec 21, 2021

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Robert answered on Dec 21 2021

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Show that if E is assumed correct, an error of 1% in the determination of G will involve an error of about 5% in the calculation of Poisson’s ratio when its correct value is XXXXXXXXXXOR 2. A steel...

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