Quiz 10 - 35 MPa. For this composite compute (a)...

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Peter Joseph William Debye (March 24, 1884 – November 2, 1966) was a Dutch physicist and physical chemist, and Nobel laureate. His first major scientific contribution was the application of the concept of dipole moment to the charge distribution in asymmetric molecules in 1912, developing equations relating dipole moments to temperature and dielectric constant. In consequence, the units of molecular dipole moments are termed debyes in his honor. Also in 1912, he extended Albert Einstein's theory of specific heat to lower temperatures by including contributions from low-frequency phonons. See Debye model MEEN 222 – 501 Fall 2009 Quiz #10 Student: Print First and Last Name
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1. A continuous and aligned fiber-reinforced composite is to be produced consisting of 45vol% aramid fibers and 55vol% of polycarbonate matrix; mechanical properties of those two materials are as follows: Also, the stress at the polycarbonate matrix when aramid fibers fail is
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Unformatted text preview: 35 MPa. For this composite compute (a) longitudinal tensile strength and (b) the longitudinal modulus of elasticity. 2. Estimate the energy required to raise the temperature of 5 kg of aluminum materials from 20 to 150 o C. Specific heat of aluminum is 900 J/kg-K. 3. Heat capacity is a property that is indicative of a materials ability to absorb heat from the external surroundings; it represents the amount of energy required to produce a unit temperature rise. TRUE / FALSE 4. The heat capacity of solids increases/decreases (circle correct answer) with temperature up to the Debye temperature above which it decreases with temperature. TRUE / FALSE Modulus of elasticity, Tensile Strength GPa MPa Aramid fiber 131 3600 Polycarbonate 2.4 65 1 point 1 point 1 point 1 point for unit 1 point 1 point 0.5 point for unit 1 point...
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This note was uploaded on 01/05/2010 for the course MEEN 222 taught by Professor Radovic during the Spring '08 term at Texas A&M.

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Quiz 10 - 35 MPa. For this composite compute (a)...

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