4-89. Determine the maximum axial force P that can be applied to the bar so as not to exceed an allowable tensile stress of σallow = 200 MPa. Problem 4-89 P 40 mm 40 mm 120 mm P r = 22 mm 30 mm

The state of stress on an element along the hydraulic lift cylinder on a truck is trv= — 5 MPaLFind the maximum shear stress on the clement and show the state of stress on a sketch of a properly oriented clement.

Solve the preceding problem if the mass of the tailgate is MT— 11 kg and that of the crate is hic— 6S kg. Use dimensions H = 305 mm, L = 406 mm, dc= 460 mm, and dT= 350 mm. The cable cross-sectional area is At= 11.0 mm'. (a) Find the tensile Force T and normal stress T in each cable. (b) IF each cable elongates

Repeat the previous problem using ? = 50° and stresses on the rotated element: sy1= 70 MPa, ??y1=-82 MPa, and tx1y1=-35 MPa.

Solve the preceding problem if F =90 mm, F = 42 kN, and t = 40°MPa

The strength-to-weight ratio of a structural material is defined as its load-carrying capacity divided by its weight. For materials in tension, use a characteristic tensile stress obtained from a stress-strain curve as a measure of strength. For instance, either the yield stress or the ultimate stress could be used, depending upon the particular application. Thus, the strength-to-weight ratio RS/Wfor a material in tension is defined as Rs/w= in which a is the characteristic stress and 7 is the weight density. Note that the ratio has units of length. Using the ultimate stress Uas the strength parameter, calculate the strength-to-weight ratio (in units of meters) for each of the following materials: aluminum alloy 606I-T6, Douglas fir (in bending}, nylon. structural steel ASTM-A57.2, and a titanium alloy. Obtain the material properties from Tables [-1 and 1-3 of Appendix I. When a range of values is given in a table, use the average value.

Determine reaction at D and C

Example Problem: 4-31 (modified) The concrete column is reinforced using four steel reinforcing rods, each having a diameter of 18 mm. Determine the stress in the concrete and the steel if the column is subjected to an axial load of 800 KN. EST= 200 GPa and Ec = 25 GPa. Represent the stress in each with a volume element. 300 mm 800 KN 300 mm

The cantilevered har in the figure is made from a ductile material and is statically loaded with Fy = 250 lbf and Fx= Fz=0. Analyze the stress situation in the small diameter at the shoulder at A by obtaining the following information.

Three metal rods are firmly attached to the walls and the middle rigid plate. Rod AB is made from stainless steel and rods CD and EF are made from 2014-T6 aluminum. If a balanced load is applied to the rigid plate, determine what the stresses are in the rods. Follow the sign convention that tensile stress is positive and compressive stress is negative. The parameter values are listed in the table above the figure. A parameter value units 470 mm 400 mm 40 mm 30 mm 30 KN cc 080 BY NO SA 2021 Cathy Zupke L₁ L2 d₁ d₂ P 4₁ B C E The stress in AB σAB= The stress in CD and EF: OCD = EF= d₂ L₂ MPa D F MPa