Interlaminar-shear-strain measurements in cord-rubber composites
Tóm tắt
The present work is an experimental study using an X-ray technique to measure directly the internal distribution of interlaminar-shear deformations which occur during uniaxial extension of two-ply, cord-rubber, angle-ply laminates—both balanced and unbalanced. Significant interlaminar-shear strains were developed between the two generally orthotropic layers of one-inch-wide specimens, which decreased almost linearly from a maximum at the edges to zero at the center line. These measurements, and those as a function of cord angle, were in good agreement with predictions obtained from various theories of laminated shear-flexible composites.
Tài liệu tham khảo
Walter, J.D., “Elastic Properties of Cord Reinforced Rubber,” Mechanics of Pneumatic Tires, 2nd Edition, S.K. Clark, ed. (to be published).
Patel, H.P., Turner, J.L. andWalter, J.D., “Radial Tire Cord-Rubber Composites,”Rubber Chem. and Tech.,49 (4),1095 (1976).
Reissner, E. andStavsky, Y., “Bending and Stretching of Certain Types of Heterogeneous Aeolotropic Elastic Plates,”J. Appl. Mech.,28,402 (1961).
Dong, S.B., Pister, K.S. andTaylor, R.L., “On the Theory of Laminated Anisotropic Shells and Plates,”J. Aerospace Sci.,29,969 (1962).
Ashton, J.E., Halpin, J.C. andPetit, P.H., Primer on Composite Materials: Analysis, Technomic, Stamford, CT (1969).
Puppo, A.H. andEvensen, H.A., “Interlaminar Shear in Laminated Composites Under Generalized Plane Stress,”J. Comp. Mats.,4,204 (1970).
Pipes, R.B. andPagano, N.J., “Interlaminar Stresses in Composite Laminates Under Uniform Axial Extension,”J. Comp. Mats.,4,538 (1970).
Oplinger, D.W., “Edge Effects in Angle-Ply Composites,” AMMRC, Watertown, MA,TR-71-62,AD 747343 (1971).
Pipes, R.B. andPagano, N.J., “Interlaminar Stresses in Composite Laminates—An Approximate Elasticity Solution,”J. Appl. Mech.,41,668 (1974).
Isakson, G. andLevy, A., “Finite-Element Analysis of Interlaminar Shear in Fibrous Composites,”J. Comp. Mats.,5,273 (1971).
Levy, A., Armen, H. and Whiteside, J., “Elastic and Plastic Interlaminar Shear Deformation in Laminated Composites Under Generalized Plane Stress,” presented Air Force 3rd Conf. Matrix Methods in Structural Mechanics, Wright-Patterson Air Force Base, OH, 19 (1971).
Rybicki, E.F., “Approximate Three-Dimensional Solutions for Symmetric Laminates Under In-Plane Loading,”J. Comp. Mats.,5,354 (1971).
Pipes, R.B. andDaniel, I.M., “Moiré Analysis of the Interlaminar Shear Edge Effect in Laminated Composites,”J. Comp. Mats.,5,255 (1971).
Oplinger, D.W., Parker, B.S. andChiang, F.P., “Edge-effect Studies in Fiber-reinforced Laminates,”Experimental Mechanics,14 (9),347–354 (Sept.1974).
Pagano, N.J. andPipes, R.B., “The Influence of Stacking Sequence on Laminate Strength,”J. Comp. Mats.,5,50, (1971).
Pipes, R.B., Kaminski, B.E. andPagano, N.J., “Influence of the Free Edge Upon the Strength of Angle-Ply Laminates,”Analysis of the Test Methods for High Modulus Fibers and Composites, ASTM,ASTM STP 521,219 (1973).
Kelsey, S., Private Communication to Firestone Tire & Rubber Co., unpublished (1975).
Turner, J.L. and Ford, J.L., “Experimental Analysis of Cord-Rubber Composites,” presented at SESA Fall Meeting, Philadelphia, PA (Oct. 11–13, 1977).
Jones, R.M., Mechanics of Composite Materials, McGraw-Hill, New York (1975).
Lou, A.Y.C. andWalter, J.D., “Interlaminar Shear-Strain Measurements in Cord-Rubber Composites,”Experimental Mechanics,18 (12),457–463 (Dec.1978).
Pagano, N.J. andHalpin, J.C., “Influence of End Constraint in the Testing of Anisotropic Bodies,”J. Comp. Mats.,2,18 (1968).