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    Strength of Materials

    Uploaded by

    Abi Nesh
    This document contains a model paper for the fourth semester civil engineering degree examination on the topic of strength of materials. The paper contains 20 multiple choice questions testing concepts like strain energy, beam deflections, buckling loads, stresses and strains in columns and shafts, and unsymmetrical bending. It also contains 5 long answer questions involving calculations of joint displacements in frames, beam deflections, sizing of columns, safety calculations for shafts, and determining eccentricity in curved beams. The model paper is designed to comprehensively test students' understanding of the key concepts covered in the course.

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    Attribution Non-Commercial (BY-NC)
    Download as DOC, PDF, TXT or read online from Scribd

    Strength of Materials

    Uploaded by

    Abi Nesh
    180 views4 pages
    This document contains a model paper for the fourth semester civil engineering degree examination on the topic of strength of materials. The paper contains 20 multiple choice questions testing concepts like strain energy, beam deflections, buckling loads, stresses and strains in columns and shafts, and unsymmetrical bending. It also contains 5 long answer questions involving calculations of joint displacements in frames, beam deflections, sizing of columns, safety calculations for shafts, and determining eccentricity in curved beams. The model paper is designed to comprehensively test students' understanding of the key concepts covered in the course.

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    © Attribution Non-Commercial (BY-NC)

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    This document contains a model paper for the fourth semester civil engineering degree examination on the topic of strength of materials. The paper contains 20 multiple choice questions testing concepts like strain energy, beam deflections, buckling loads, stresses and strains in columns and shafts, and unsymmetrical bending. It also contains 5 long answer questions involving calculations of joint displacements in frames, beam deflections, sizing of columns, safety calculations for shafts, and determining eccentricity in curved beams. The model paper is designed to comprehensively test students' understanding of the key concepts covered in the course.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as DOC, PDF, TXT or read online from Scribd
    Download as doc, pdf, or txt
    180 views4 pages

    Strength of Materials

    Uploaded by

    Abi Nesh
    This document contains a model paper for the fourth semester civil engineering degree examination on the topic of strength of materials. The paper contains 20 multiple choice questions testing concepts like strain energy, beam deflections, buckling loads, stresses and strains in columns and shafts, and unsymmetrical bending. It also contains 5 long answer questions involving calculations of joint displacements in frames, beam deflections, sizing of columns, safety calculations for shafts, and determining eccentricity in curved beams. The model paper is designed to comprehensively test students' understanding of the key concepts covered in the course.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as DOC, PDF, TXT or read online from Scribd
    Download as doc, pdf, or txt
    of 4

    M 029

    MODEL PAPER

    B.E. DEGREE EXAMINATION.

    Fourth Semester

    Civil Engineering

    CE 236 — STRENGTH OF MATERIALS

    Time : Three hours Maximum : 100 marks

    Answer ALL questions.

    PART A — (10 × 2 = 20 marks)

    1. Calculate the strain energy stored in a bar 2 m long, 50 mm wide and 40


    mm thick, when it is subjected to a tensile load of 50 kN. Take E = 200
    GPa.

    2. A rectangular body 500 mm long, 100 mm wide and 50 mm thick


    subjected to a shear stress of 80 MPa. Determine the strain energy
    stored in the body.
    Take N = 85 GPa.

    3. A fixed beam AB of 5 m span carries a point load of 20 kN at a distance of


    2 m from left support. Determine the deflection under the load, if
    EI = 10 ×10 3 kN–m2.

    4. A beam AB of span 3 m is fixed at A and propped at B. Find the reaction


    at the prop. when it is loaded with a uniformly distributed load of 20
    kN/m over its entire span?

    5. Define ‘‘buckling load’’.

    6. Write the effective length of column for the following end conditions :
    (a) Both ends pinned condition

    (b) Both ends fixed condition.

    7. The internal pressure of a stream drum is 10 N/mm2. The maximum


    circumferential stress is 85 N/mm2 and maximum longitudinal stress is
    22 N/mm2. Find the equivalent tensile stress in a simple tensile test
    according to the maximum shear stress theory.

    8. State strain energy theory.

    9. A channel section has flanges 120 mm × 20 mm and web 160 mm × 10


    mm. Determine the shear centre of the channel.

    10.List the reason for unsymmetrical bending.

    PART B — (5 × 16 = 80 marks)

    11.Find the vertical displacements of joint V1 of the frame shown in Fig. 11.
    due to applied loadings. Take E = 2 ×10 5 N/mm2 and Area of
    members 1200 mm2.

    Fig. 11.

    12.(a) Find by Maculay’s method, the central deflection of a fixed beam


    loaded with uniformly distributed load throughout the span.

    Or

    2 M 029
    (b) A continuous beam ABC consists of two spans AB and BC of lengths 6 m
    and 8 m. The span AB carries a point load of 120 kN at 4 m from A
    while the span BC carries a point load at 5 m frame. Find the
    moments and reactions at supports. Draw SFD and BMD.

    13.(a) A 2 m long pin ended column of square cross section is to be made


    of wood. Assuming E = 12 GPa and allowable stress being limited
    to
    12 MPa, determine the size of the column to support the following
    loads safely.

    (i) 95 kN (ii) 200 kN.

    Use factor of safety of 3 and also calculate the Euler’s crippling load for
    buckling.

    Or

    (b) A hollow cast iron column whose outside diameter is 200 mm and has a
    thickness of 20 mm is 4.5 m long and is fixed at both ends.
    Calculate the safe load by Rankine’s formulae using a factor of
    safety of 2.5. Find the ratio of Euler’s to Rankine’s loads. Take

    1
    E =1 ×10 5 N/mm2 and Rankine’s constant = and fc =
    1600
    550 N/mm2.

    14.(a) A hollow shaft 30 mm internal diameter and 50 mm external


    diameter is subjected to a twisting moment of 800 Nm and an axial
    compressive force of 40 kN. Determine the factor of safety
    according to strain energy theory, if the yield strength of material
    is 280 N/mm2 and Poisson’s ratio is 0.3.

    Or

    (b) The load on a bolt consists of an axial thrust of 8 kN together with a


    transverse shear force of 4 kN. Calculate the diameter of the bolt
    according to

    3 M 029
    (i) Maximum principal stress theory and

    (ii) Maximum shear stress theory.

    1
    Take F.O.S. = 3, typ = 285 N/mm2 g = 0.3 .
    m

    15.(a) A curved beam has a T–section as shown in Fig. 15 (a). The inner
    radius is 300 mm. What is the eccentricity of the section?

    Fig. 15 (a)

    Or

    (b) A thick pipe of 300 mm outer diameter and 200 mm internal diameter
    is subjected to an internal pressure of 12 MPa. What minimum
    external pressure can be applied so that the tensile stress in the
    metal shall not exceed 16 MPa?

    ———————

    4 M 029

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