EML 4230 Introduction to Composite Materials

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Macromechanics of a Laminate

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Presentation transcript:

EML 4230 Introduction to Composite Materials Chapter 2 Macromechanical Analysis of a Lamina Hygrothermal Stresses and Strains Dr. Autar Kaw Department of Mechanical Engineering University of South Florida, Tampa, FL 33620 Courtesy of the Textbook Mechanics of Composite Materials by Kaw

Hygrothermal Stress-Strain Relationship For a unidirectional lamina Thermally induced strains: Moisture induced strains: (2.174) (2.175) (2.176)

Hygrothermal Stress-Strain Relationship For a unidirectional lamina (2.174) (2.177)

Hygrothermal Stress-Strain Relationship For an angular lamina Thermally induced strains: Moisture induced strains: (2.178) (2.179) (2.180)

Transformation of CTE For an angular lamina (2.181) (2.95) (2.96) (2.97a,b)

Transformation of Coefficients of Moisture Expansion For an angular lamina (2.182) (2.95) (2.96) (2.97a,b)

Example 2.20

Example 2.20 (2.181)

Example 2.20 (2.182)

Example 2.20 (2.178)

END