A curved beam has neutral axis is curved while loaded and straight when unloaded.

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If for a curved beam of trapezoidal cross section, radius of neutral axis is 89.1816mm and radius of centroidal axis is 100mm, then find the bending stress at inner fibre whose radius is 50mm. Area of cross section of beam is 7200mm² and the beam is loaded with 100kN of load.

asked Jan 25 in Machine Design by Carter (89.5k points)

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The bending stress in a straight beam varies linearly with the distance from neural axis like that in a curved beam.

asked Feb 2 in Machine Design by Carter (89.5k points)

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A curved beam with eccentricity 0.02D is loaded with 1kN.Centroidal radius=4D and inner and outer radii are 3.5D and 4.5D respectively. Area of cross section is 0.8D². Find the dimension D if allowable stress is 110N/mm² and considering combined effect of direct stress and bending stress.

asked Feb 2 in Machine Design by Carter (89.5k points)

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A curved beam with eccentricity 0.02D is loaded with 1kN.Centroidal radius=4D and inner and outer radii are 3.5D and 4.5D respectively. Area of cross section is 0.8D². Find the dimension D if allowable stress is 110N/mm².Considering only bending stress.

asked Jan 23 in Machine Design by Carter (89.5k points)

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A curved beam with eccentricity 0.02D is loaded with 1kN.Centroidal radius=4D and inner and outer radii are 3.5D and 4.5D respectively. Area of cross section is 0.8D². Find the dimension D if allowable stress is 110N/mm² and considering only direct tensile stress.

asked Jan 23 in Machine Design by Carter (89.5k points)

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All type of stresses vanishes after as soon as the applied load is removed.

asked Jan 27 in Machine Design by Carter (89.5k points)

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The critical value at which crack extension occurs is called

asked Jan 23 in Machine Design by Carter (89.5k points)

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How many modes are there for crack propagation?

asked Jan 23 in Machine Design by Carter (89.5k points)

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Stress intensity factor is the critical value of stress at which crack extension occurs.

asked Jan 22 in Machine Design by Carter (89.5k points)

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A beam subjected to bending moment undergoes which of the following stresses?

asked Jan 23 in Machine Design by Carter (89.5k points)

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The normal stress is perpendicular to the area under considerations, while the shear stress acts over the area.

asked Jan 25 in Machine Design by Carter (89.5k points)

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Cotter joint is used when the members are subjected to which type of stresses?

asked Feb 2 in Machine Design by Carter (89.5k points)

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If knuckle joint is to fail by crushing failure of pin in fork, then determine the diameter of knuckle pin when 50kN axial tensile force act on rods. Given: Max allowable compressive stress=25N/mm², thickness of each eye of fork=25mm.

asked Jan 22 in Machine Design by Carter (89.5k points)

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If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 10N/mm². Find the inclination of the plane in which shear stress is maximal.

asked Feb 2 in Machine Design by Carter (89.5k points)

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A right angled bell-crank is designed to raise a load of 5kN at short arm whose length is 100mm. Also longer arm is of length 500mm. If permissible bearing pressure on pin is 10N/mm² and diameter of the 20mm, find the length of the pin.

asked Feb 2 in Machine Design by Carter (89.5k points)

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If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 20N/mm²Find the maximum amount of shear stress to which the body is subjected.

asked Jan 27 in Machine Design by Carter (89.5k points)

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If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 20N/mm². Find the minimum normal stress.

asked Jan 25 in Machine Design by Carter (89.5k points)

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A right angled bell-crank is designed to raise a load of 5kN at short arm whose length is 100mm. Also longer arm is of length 500mm. If permissible bearing pressure on pin is 10N/mm² and diameter of the 20mm, find the shear stress in the pin.

asked Jan 25 in Machine Design by Carter (89.5k points)

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Resilience is defined as the property of material to absorb energy when deformed _________ and to release this energy when unloaded.

asked Jan 23 in Machine Design by Carter (89.5k points)

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If compressive yield stress and tensile yield stress are equivalent, then region of safety from maximum principal stress theory is of which shape?

asked Feb 2 in Machine Design by Carter (89.5k points)

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According to principal stress theory, which option represents the correct relation between yield strength in shear (YSS) and the yield strength in tension (YST)?

asked Jan 27 in Machine Design by Carter (89.5k points)

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If any cross section is subjected to direct tensile stress and bending stress, then find the dimension of cross section. Given length & breadth are t and 2t respectively. F=25kN acts on the top fibre of the cross section, M=F x t . Also maximum allowable tensile stress =100N/mm².

asked Jan 23 in Machine Design by Carter (89.5k points)

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Calculate the diameter of pin from shear consideration with maximum shear stress allowed is 40NN/mm² and an axial tensile force of 50kN is acting on the rod.

asked Jan 23 in Machine Design by Carter (89.5k points)

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Can the cotter joint be used to connect slide spindle and fork of valve mechanism?

asked Jan 23 in Machine Design by Carter (89.5k points)

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The distance between fulcrum and dead weights is 100mm. Dead weights are of 2945.2N. An effort of 294.52N acts on the other hand. Find the distance between the fulcrum and other end of the lever.

asked Jan 22 in Machine Design by Carter (89.5k points)

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