Difficulty in the experimental determination of the interaction com ponent of strength tensor of boron-epoxy composites by off axis tests is discussed. Although off axis data agree well with the prediction of the strength tensor theory, the uniaxial data cannot be used to back calculate the interaction term. The data also showed that responses due to normal and shear stresses can be uncoupled in the linear as well as nonlinear regions.
Get full access to this article
View all access options for this article.
References
1.
S.W. Tsai and E.M. Wu, "A General Theory of Strength for Anisotropic Materials,"J. Composite Materials, Vol. 5 (1971), p. 58.
2.
S.W. Tsai, "Mechanics of Composite Materials, Part II - Theoretical Aspects,". Air Force Materials Laboratory Technical Report AFML-TR-66-149, ( 1966 ).
3.
O. Hoffman, "The Brittle Strength of Orthotropic Materials,"J. Composite Materials, Vol. 1 (1967), p. 200.
4.
B.R. Collins and R.L. Crane, "A Graphical Representation of the Failure Surface of a Composite,"J. Composite Materials , Vol. 5 ( 1971), p. 408.
5.
E.M. Wu and R.L. Thomas, "Off-Axis Test of a Composite,"J. Composite Materials , Vol. 2 (1968), p. 523.
6.
R.R. Rizzo, "More on the Influence of End Constraints on Off-Axis Tensile Tests,"J. Composite Materials, Vol. 3 (1969), p. 202.
7.
G.L. Richards , T.P. Airhart and J.E. Ashton, "Off-Axis Tensile Coupon Testing,"J. Composite Materials , Vol. 3 (1969), p. 367.
8.
N.J. Pagano and J.C. Halpin, "Influence of End Constraint in the Testing of Anisotropic Bodies,"J. Composite Materials , Vol. 2 ( 1968), p. 18.
9.
B.E. Kaminski, E.L. McKague and G.L. Lemon, "Static and Thermal Physical Properties," Vol. 1 Air Force Materials Laboratory Technical Report, AFML-TR-108.
10.
B.W. Rosen , "A Simple Procedure for Experimental Determination of the Longitudinal Shear Modulus of Unidirectional Composites,"J. Composite Materials, Vol. 6 ( 1972), p. 552.
