MECH204: Mechanics of Solids

Added on - 03 May 2020

  • MECH204

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INSTITUTIONAL AFFILIATIONFACULTY OF STUDIESCOURSE CODECOURSE NAMEMECHANICS OF SOLIDS: MECH204LABORATORY (PART A AND PART B)STUDENT NAMESTUDENT REGISTRATION NUMBERTUTOR: Dr. Dane TurnerDATE OF SUBMISSION
INTRODUCTIONIn mechanics, the most commonly used structures are the torsional loaded shafts. A commonexample is the drive shaft that is implemented in the back wheels of an automobile. The mainpurpose of the shaft is to transmit torsion. In most mechanical structures, there are deformationby elongation and/or compression. This brings out the idea of stress and strain. Uniaxial loadingresults in deformation along the grid in a bid to elongate the lines in the direction of tensileloading. The implication is the contraction of the lines perpendicular to the loading direction.Usually the normal stress is denoted by the expression,σ=PA...stressWhile the shear stress is thereafter denoted as,τ=PA...theloadinghereistransverseratherthanextensionalThe twisting moments or the torques are the forces that act through the length so as to causerotation. The example of the automobile highlighted above captures the shafts in the torsion ofall rotating machinery. From all the analysis of torsion in terms of kinematics, equilibrium andconstitutive linear elastic regime, the general equation of computation is given as,These moments are thereafter applied by turning the input section to yield torque till thespecimen is returned to zero or nil value. The torsion testing machine used is as illustrated below,
AIMS AND OBECTIVES(i)To obtain an understanding of a simple torsion test.(ii)To investigate how torsion is affected by the modulus of rigidity (G) and the differentrod’s dimensions.EXPERIMENT EQUIPMENT(i)Torsion testing machine(ii)Test specimen(iii)Micrometer or Vernier calipers(iv)Permanent penSafety measures(i)All students are required to be in their personal protective equipment and to wearsafety googles before participating in the laboratory experiment.EXPERIMENT PROCEDURE(i)The torsion apparatus and equipment were setup as shown in the figure 1 below.(ii)The torsion experiment was run on different specimen.(iii)The torque and angle of twist for different specimen data was collected and recordedin a table from the torsion experiments being run.(iv)To understand the action of shear in a beam, the action of moment of resistance in abeam, and to convert the strain reading to force readings, the shear force experimentwas performed.(v)The shear experiment apparatus was set up as shown in figure 2 below,
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