A mild steel bar is subjected to an axial force P, resulting in an axial stress ♂=100N/mm² What would be the normal stress on a plane n-n making an angle = 45° with its axia?
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- Compare the engineering and true secant elastic moduli for the natural rubber in Example Problem 6.2 at an engineering strain of 6.0. Assume that the deformation is all elastic.A symmetrical framework consisting of three pin-connected bars is loaded by a forceP (see figure). The angle between the inclined bars and the horizontal is a = 52°. Theaxial strain in the middle bar is measured as 0.036.Determine the tensile stress in the outer bars if they are constructed of a copper alloyhaving the following stress-strain relationship:A steel bar 25cm long of rectangular cross section 25mm by 50mm is subjected to a uniform tensile stress of 200N/m^2 along it's length.find the changes in dimension.E=205000N/mm^2, poison ratio=0.3
- Q36 onlys Ratio of stress in part A and BA steel section having a cross section of 20 mm x 30 mm is subjected to an axial force of 240 kN. The steel section has produces a strain of 0.002. If it has a value of Poisson's ratio of 0.30. Which of the following gives the bulk modulus of the steel section. a. 133333 MPa b. 166667 MPa c. 111111 MPa d. 144444 MPaThe tensile member shown, 60mm x 80mm in cross-section is subjected to a load of 250kN. The plane AA’ makes an angle of 15o with the x-axis. What is the tensile stress of section AA’? Determine the shear stress on plane AA’ At what angle of plane AA’ is the shear maximum.
- A cross section of a beam is shown. If the beam is subjected to a positive moment, which bending stress will have the greater magnitude? a. TENSION BENDING STRESS b. COMPRESSION BENDING STRESSA rigid bar AB is hinged at A and is supported by a rod CD at C. The rod is pin connected at D, as shown. Neglect deflections of the bar due to bending. Use E=200 GPa. If the allowable stress in rod CD is 120 MPa, what weight W in kgs can be safely applied?A 3m long steel plate having a cross section of 25mm by 300mm is use as a hanger and subjectedto a tensile load of 1070 kN. The proportional limit of the steel is assumed to be 200 MPa. If thePoisson’s ratio is 0.25, determine the following;a. The transverse strain,b. The total axial deformation, andc. The transverse dimensional change along 300mm.
- Answer the following true or false questions? 1. The thermal extension of any member depends on the expanslon coefficient of this member. 2. The ratio of stress to strain Is constant for any material. 3. In compound bars, the change in length does not depend on the position of applied load. 4. When the shear force Is zero, the bending moment is zero. 5. The bending stress on a beam depends on the radius of curvature of the beam. 6. The maximum lorslon stress occurs at the center of a shaft.A state of stress is specified in the figure shown below. Determine the Normal stress σy (mPa) on the Principal Plane if P1 = -5 mPa; P2 = 39 mPa and v = 21 mPaAn M pair of forces is applied to the beam of which cross-section is shown in a plane that makes an angle eyle with the vertical. Find the stress at point A.