AAE352_Summer_Lec32 - Andrew J. Ritchey aritchey@purdue.edu...

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Andrew J. Ritchey aritchey@purdue.edu ARMS B144 765-494-5985 https://engineering.purdue.edu/AAE/Academics/Courses/aae352/2010/summer July 29, 2010 AAE 352 Summer 2010 32-1
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July 29, 2010 AAE 352 Summer 2010 32-2
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July 29, 2010 AAE 352 Summer 2010   xy   xy   12   12 S   Q   S   Q   T   1 T   T   1 T 32-3
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Fiber angles are measured relative to the x-axis Plies are listed starting on the bottom face and continuing in sequence to the top face When a laminate possess symmetry we can us an abbreviated notation: [90/0/90/90/0/90] becomes [90/0/90] s July 29, 2010 AAE 352 Summer 2010 90° 90° 90° 90° Müller de Almeida et. al. Composite Structures 25 (1993) 287-293 32-4
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Plies or groups of plies can be repeated in a laminate. [0/0/90/90] becomes [0 2 /90 2 ] [0/90/0/90/45/45] becomes [(0/90) 2 /45 2 ] Two adjacent plies can be oriented with the same angle but of opposite signs. [+45/-45/-45/+45] becomes [±45] s [-45/+45/+45/-45] becomes [ 45] s July 29, 2010 AAE 352 Summer 2010 ± +45° -45° x y z 32-5
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In symmetric laminates the ply orientations can be mirrored about the x-y plane A laminate with only 0° and 90° plies is called a cross-
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This note was uploaded on 01/18/2012 for the course AAE 352 taught by Professor Chen during the Fall '08 term at Purdue University-West Lafayette.

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AAE352_Summer_Lec32 - Andrew J. Ritchey aritchey@purdue.edu...

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