Strength of Materials
Seatwork 1. An aluminum tube is rigidly fastened between a bronze and steel rod as shown. Axial loads are applied at the position indicated. Determine the stress in each material.
2. Two bars are equal length but different materials are suspended from a common support, bar A supports 200lbs and bar B supports 2000lbs, if the cross sectional area of bar A is 0.00015ft2 and bar B is 0.015ft2, compare the strength of bar A and bar B in psi.
Assignment 1. A timber shown in figure with a force of 50kN, compressive with an angle of 30˚ the diameter of 150mm. Calculate the thickness at pt. b and pt. c with the shearing stress of 10Mpa.
2. Truss shown in figure, cross sectional area of the material is 900mm2. Calculate the stress along AB, AC and BD.
Assignment 1. Equate1 and 2. Solve for W in terms of F1 and F2.
2. If the cross sectional area of CA and CB are 700mm2 and 500mm2. Calculate forces CA and CB stress are not exceed 10Mpa and 15Mpa respectively.
Assignment 1. Compute the total elongation caused by an axial load of 100kN applied to a flat bar 20mm thick. Tapering from a width of 120mm to 40mm in a length of 10m as shown in figure. Assume E=200x109N/m2. At section m-n the half width y(mm) at a distance x(m) from the left end. y-20/x=60-20/10, section m-n in a differential length dx. Area section A=20(2y).
2. What is the modulus of elasticity if the stress is 44, 000psi=303.6Mpa and unit strain(ₑ) of 0.00105?
3. A 30m long aluminum bar is subjected to a tensile stress of 172Mpa. Find the elongation if E=69, 116Mpa.
Assignment 1. Determine the safe wall thickness of 30inches steel tank with internal pressure of 7.82Mpa, the yield stress of material is at 275.28Mpa, the factor of safety to use is 2.
2. Determine the bursting steam pressure of a steel shell with diameter of 10inches and made of ¼ thick steel plates. The joint efficiency is at 70% and the tensile strength is 60ksi.
3. At 20˚F, a
2. Two bars are equal length but different materials are suspended from a common support, bar A supports 200lbs and bar B supports 2000lbs, if the cross sectional area of bar A is 0.00015ft2 and bar B is 0.015ft2, compare the strength of bar A and bar B in psi.
Assignment 1. A timber shown in figure with a force of 50kN, compressive with an angle of 30˚ the diameter of 150mm. Calculate the thickness at pt. b and pt. c with the shearing stress of 10Mpa.
2. Truss shown in figure, cross sectional area of the material is 900mm2. Calculate the stress along AB, AC and BD.
Assignment 1. Equate1 and 2. Solve for W in terms of F1 and F2.
2. If the cross sectional area of CA and CB are 700mm2 and 500mm2. Calculate forces CA and CB stress are not exceed 10Mpa and 15Mpa respectively.
Assignment 1. Compute the total elongation caused by an axial load of 100kN applied to a flat bar 20mm thick. Tapering from a width of 120mm to 40mm in a length of 10m as shown in figure. Assume E=200x109N/m2. At section m-n the half width y(mm) at a distance x(m) from the left end. y-20/x=60-20/10, section m-n in a differential length dx. Area section A=20(2y).
2. What is the modulus of elasticity if the stress is 44, 000psi=303.6Mpa and unit strain(ₑ) of 0.00105?
3. A 30m long aluminum bar is subjected to a tensile stress of 172Mpa. Find the elongation if E=69, 116Mpa.
Assignment 1. Determine the safe wall thickness of 30inches steel tank with internal pressure of 7.82Mpa, the yield stress of material is at 275.28Mpa, the factor of safety to use is 2.
2. Determine the bursting steam pressure of a steel shell with diameter of 10inches and made of ¼ thick steel plates. The joint efficiency is at 70% and the tensile strength is 60ksi.
3. At 20˚F, a