Spring-1994-EMA6166-Exam-2

Spring-1994-EMA6166-Exam-2 - EMA 6166 Polymer Composites...

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EMA 6166 Polymer Composites NAME: Dr. A. Brennan Soc. Sec. No. EXAM II (120 minutes) Thursday, April 21, 1994 Part I: Definitions (30 pts, 20 minutes) Give a brief, succinct description of the term(s) listed using only the space provided. Use equations where appropriate. 1. In plane (intralaminar) stresses: 2. orthotropic lamina: 3. isotropic lamina: 4. balanced laminate: 5. [0/90/=+ _45/0]: 6. Secant Modulus: 7. tan δ : 8. DGEBA: 9. Mesophase (Theocaris): 10. Pultrusion: Part II: Indicate whether the following statements are TRUE or FALSE . Give an explanation if the statement is false. (12 pts, 12 minutes)
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Page 2 Name: 1. Under plane stress conditions ε zz = γ xz = γ yz for a thin isotropic lamina. 2. Orthotropic lamina behave in a similar fashion to isotropic lamina in terms of displacements due to applied stresses. 3. Stress at failure for a unidirectional continuous fiber composite will exceed the ROM value at volume fractions of fiber greater than 0.5. 4.
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This note was uploaded on 07/22/2011 for the course EMA 6166 taught by Professor Staff during the Fall '08 term at University of Florida.

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Spring-1994-EMA6166-Exam-2 - EMA 6166 Polymer Composites...

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