8. Assume that surface tension forces act on a double-edge razor blade at an angle relative to the water surface on the water surface, as shown below. a. The mass of the razor blade is 0.64 x 103 kg and the total length of its sides is 206 mm. Determine the value of → required to maintain equilibrium between the blade weight and the resultant surface tension force b. The mass of the razor blade is 2.61 x 103 kg and the total length of its sides is 154 mm. Why does the blade sink? Support your answer with the necessary calculations. Surface tension force Blade

A pressurized cylindrical tank with flat ends is loaded by torques T and tensile forces P (see figure). P The tank has an inner radius of r = 141 mm and wall thickness t = 6.5 mm. The internal pressure p = 7.25 MPa and the torque T = 810 N • m. (Assume that the structure behaves linearly elastically and that the stresses caused by two or more loads may be superimposed to obtain the resultant stresses acting at a point. Consider both in-plane and out-of-plane shear stresses unless otherwise specified.) (a) What is the maximum permissible value of the forces P if the allowable tensile stress in the wall of the cylinder is 161 MPa? (Enter the magnitude in kN.) kN (b) If forces P = 400 kN, what is the maximum acceptable internal pressure in the tank (in MPa)? MPa

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Answer for displacement

Three aluminum rods support the rigid L-shaped bracket BCF as shown in the figure. Determine the stress in each rod if rod FG is cooled by 50°C. All three rods have the same cross-sectional area of 1000 mm2. Use 73.1 GPa and 23 x 10-6/ °C for the modulus of elasticity and the coefficient of thermal expansion of aluminum, respectively. 2 m 1 m D 1.1 m B. 1 m 1.25 m 1.5 m

The two sheets of soft plastic are bonded to the central steel strip. Determinethe magnitude of the largest force P that can be safely applied to the steel strip andthe corresponding displacement of the strip. For the plastic, use tw = 10 ksi and G = 800 ksi. Neglect deformation of the steel strip.

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1. An axial force of 250 kN is applied to the assembly shown, made of cylindrical brass core surrounded by an aluminum shell. The axial force is applied through rigid end plates. a) Determine the normal stress in each of the metal components, given that Ebrass = 105 GPa and Ealum = 70 GPA. 100mm b) What is the axial deformation of the assembly? 200mm 200mm

thank you. Civil engineering - strength of materials