In 0° and 90° T300 carbon fiber cross-pressed fabric panels are considered as orthotropic anisotropic materials. How the Thomson anisotropy parameter can be used to derive the elasticity matrix of orthotropic anisotropic materials under the condition of phase velocity only

Steady-state creep rate data are given here for some alloy taken at 200°C (473 K): i, (h) a (MPa) 2.2x 103 54 2.3 x 102 70 If it is known that the activation energy for creep is 120000 J/mol, compute the steady-state creep rate at a temperature of 250°C (523 K) and a stress level of 47 MPa. h1

Steady-state creep rate data are given here for some alloy taken at 200°C (473 K): i és (h-¹) 2.2 x 10-3 h-1 2.5 x 10-2 o (MPa) 56 If it is known that the activation energy for creep is 130000 J/mol, compute the steady-state creep rate at a temperature of 230°C (503 K) and a stress level of 50 MPa. 70

Given the following: Cp of Br: 0.226 J/g-K BP of Br: 59 deg C density of Br: 3.12 g/mL Hvap of Br: 30,900 J/mol V of liquid Br solution: 50 mL Cp of Br2: 0.473 J/g-K   What is the total heat required in heating Br from 25 to 75 deg C?

Answer the folowing with True or False. Density of a foam material depends on the wall thickness and size of its foam cells.   (     ) BCC structure is more densely packed than the FCC structure. (    ) The anion – cation size ratio has an important influence in determining the crystal structure of ionic solids. (     ) CFRP and GFRP are examples of hybrid materials. ( ) The density of a material is determined exclusively by its atomic weight. ( ) Body diagonal in BCC structure has Miller indices of [111]. ( ) The relationship s = Ee is known the Ohms law. (     ) A closed packed triangular plane in FCC crystal has Miller indices of (111). ( )

ts) In a laboratory creep experiment at 1000°C, a steady-state creep rate of 5 x 10-¹% per hour is obtained in a metal alloy. The creep mechanism for this alloy is known to be dislocation climb with an activation energy of 200 kJ/mol. Predict the creep rate at a service temperature of 600°C. (Assume that the laboratory experiment duplicated the service stress.)

electric highline cable contains one cold-drawn steel wire and six annealed aluminum wires, each with a 2 mm diameter (the steel provides the required strength; the aluminum, the conductivity). If the steel and aluminum have elastic modulus values of 205 GPa and 70 GPa, respectively, what is the overall stiffness for the composite cable?

You design a material to be used as a cable in a high temperature furnace operating at 900°C to withstand a stress of 20,000 psi (137.9 MPa). You find it lasts only 25,000 hours but you need it to last longer than 100,000 hours. If the activation energy for rupture is 35,000 cal/mol (146.4 kJ/mol) will it last long enough if the temperature is reduced to 800°C?

Illustrate the shear stress vs shear strain relationship of the following materials: Ethanol, juice concentrate, Quick sand, blood, glycerin, ketchup and corn starch

Derive expression for the lumped analysis in terms of Fourier and Biot numbers.