The σ - ε diagram for elastic fibers is shown. (Figure 1) Figure 385 σ(MPa) 77 < 1 of 1 €(mm/mm) 1 2 2.25 Part A Determine the modulus of elasticity of the fibers. Express your answer using three significant figures. Part B Estimate their modulus of toughness. Express your answer using three significant figures. Part C Estimate their modulus of resilience. Express your answer using three significant figures.

Rigid bar ABCD is loaded and supported. Steel [E=30,000 ksi] bars (1) and (2) are unstressed before the load P is applied. Bar (1) has a cross-sectional area of 0.625 in.2 and bar (2) has a cross-sectional area of 1.25 in. 2. After load P is applied, the strain in bar (2) is found to be 900 με. If there is a clearance of 0.05 in. in the pin connection at C, determine: (a) the stresses in bars (1) and (2).(b) the vertical deflection of point D.(c) the load P.

1. Arectangular plate 50 mm x 10 mm with a hole 10 mm diameter is subjected to an axial load of 10KN. Taking stress concentration into account, find the maximum stress induced. [Ans. 50 MPa]

Compute the modulus of elasticity  for a composite which uses High Modulus Carbon fibers and Polyester matrix. The volume fraction of fibers is  45 % and matrix is 55 %.  Note-use chart in image

Mechanics of materials I

I need to calculate the tensile stiffness along the fibre which have a length of 250um  below are the values ive been given Matrix Stiffness Em = 6 GPaMatrix Strength (sigma)m = 50 MPaFibre Volume Fraction 0.41Fibre Stiffness Ef = 49 GPaFibre Strength (sigma)f = 103 MPaFibre Shear Stiffness  Gf = 23 GPaMatrix Shear Stiffness Gm = 2 GPaInterface Strength ti = 7 MPaFibre Diameter = 7um poissons ratio of matrix = 0.32Poissons ratio of fibre = 0.23tensile stress of 190 MPa applied at an angle of 60 degrees. it is a unidirectional composite.

Q2/ At constant strain, about 7.6 Mpa of stress is used to a polymer. After 960 h, the stress reduced to 4.8 Mpa at 30 °C. When the same polymer is heated to 50 °C the relaxation time is 1200 h. 1- Estimate the relaxation time at 30 °C? 2- Estimate the stress after 1440 h and 30 °C? 3- Estimate the stress relaxation activation energy using the equation below: !=Cexp ) Where R = 8.314 j/mol. K, and C: constant %3D RT

My answer is displayed and incorrect. Please give answer in ksi.

The diameter (d) of a solid rod (i.e., with a circular cross-section) is 16 mm and is made from a homogeneous material. The length (L) of the rod is 1.75 m and Young’s Modulus for the material (E) is 250 GPa. When the rod is placed under tension it experiences deformation and a stress (?) of 650 MPa. Calculate the following:(1) Strain energy (U) to 2 decimal places in Joules.(2) Strain energy per unit volume (U/V) in J/m3(3) The change in length ∆L to 2 decimal places in mm.(4) The strain (?) due to deformation to 2 significant figures. (show all work)

This is a Important Problem, Please solve carefully Include all the steps (diagram, formula) Handwritten Solution Recommended