Design of composite laminates requires the determination of changes in stiffness and strength resulting from varying the ply orientation and total laminate thickness. Graphical determination can be made simple by use of laminate stiffnesses in conjunction with failure surface in a special strain space. A set of generalized graphs for all practical laminates of a given composite can now replace the current limitation of one set for each discrete laminate.
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References
1.
M.E. Waddoups, "Characterization and Design of Composite Materials," in Composite Materials Workshop, Technomic, 1968, p. 254.,
2.
S.W. Tsai and N.J. Pagano, "Invariant Properties of Composite Materials," in Composite Materials Workshop, Technomic, 1968, p. 233.
3.
H.T. Hahn, "A Derivation of Invariants of Fourth Rank Tensors," J. Composite Materials, Vol. 8 ( 1974), in press.
4.
E.M. Wu, "Phenomenological Anisotropic Failure Criterion," to be published.
5.
G.C. Grimes and J.M. Whitney, "Use of Significant Stress (Strain) Levels in Composites for Developing Design Allowables," Proc, the Conference on Fibrous Composites in Flight Vehicle Design, Air Force Flight Dynamics Laboratory, AFFDL-TR-72-130, 1972, p. 1023.
6.
H.T. Hahn and S.W. Tsai, "Nonlinear Elastic Behavior of Unidirectional Composite Laminae," J. Composite Materials, Vol. 7, ( 1973), p. 102.
7.
H.T. Hahn, "Nonlinear Behavior of Laminated Composites," J. Composite Materials, Vol. 7 (1973), p. 257.
8.
Advanced Composites Design Guide, Air Force Materials Laboratory (AFML/LC), Vol. 1, 1973.
9.
S.W. Tsai and E.M. Wu, "A General Theory of Strength for Anisotropic Materials," J. Composite Materials, Vol. 5 ( 1971), p. 58.
10.
E.M. Wu , "Strength and Fracture of Composites," to be published.
11.
S.W. Tsai, "Strength Characteristics of Composite Materials," NASA CR-224, 1965.
12.
P.H. Petit and M.E. Waddoups, "A Method of Predicting the Nonlinear Behavior of Laminated Composites," J. Composite Materials, Vol. 3 (1969), p. 2.
13.
N.J. Pagano and R.B. Pipes, "Some Observations on the Interlaminar Strength of Composite Laminates," Int. J. Mech. Sci., Vol. 15 (1973), p. 679.
14.
P.C. Chou, B.M. McNamee and D.K. Chou, "The Yield Criterion of Laminated Media," J. Composite Materials, Vol. 7 (1973), p. 22.
