Compressive Stability of Delaminated Random Short-Fiber Composites,Part II

Abstract

The basic mechanics and mechanisms of compressive stability of delaminated random short-fiber composites are studied. An experimental program, employing an SMC-R50 composite with built-in delaminations, is conducted to evaluate the validity of the mechanistic model and to demonstrate further the accuracy of the methods of analysis developed in the associate paper [1]. Excellent agreement between experimen tal results and analytical solutions is observed. Based on the analytical development, the fundamental compressive stability behavior of delaminated short-fiber composites is investigated by a comprehensive parametric study. The influence of delamination length, crack position, number of delaminations, and composite plate length on the critical compressive stress and buckling modes is analyzed in detail. Possible crack growth in the delaminated composite subjected to in-plane compression is also studied.

Get full access to this article

View all access options for this article.

References

Wang, S.S. , Zahlan, N.M. and Suemasu, H. , "Compressive Stability of Delaminated Random Short-Fiber Composites, Part I—Modeling and Methods of Analysis," Journal of Composite Materials, Vol. 19, pp. 296-316 (July 1985).

Heimbuch, R.A. and Sanders, B.A. , "Mechanical Properties of Automotive Chopped Fiber Reinforced Plastics," in Composite Materials in the Automobile Industry , S. V. Kulkarni, C. H. Zweben and R. B. Pipes, Eds., American Society of Mechanical Engineers, New York, NY, pp. 111-139 (December 1978).

Denton, D.L. , The Mechanical Properties of an SMC-R50 Composite, Owens-Corning Fiberglas Corp., Granville, OH ( 1979).

Denton, D.L. , "Mechanical Properties Characterization of an SMC-R50 Composite," SAE Technical Paper Series, No. 790671 Society of Automotive Engineers, Inc., Warrendale, PA ( 1979).

Wilson, D.W. , "Characterization of the Interlaminar Shear Fatigue Properties of SMC-R50," Report No. CCM-80-5, Center for Composite Materials, University of Delaware, Newark, DE (May 1980 ).

Sanders, B. A. (Ed.), Short-Fiber Reinforced Composite Materials , ASTM STP 772, American Society for Testing and Materials, Philadelphia, PA ( 1982).

Adams, D.F. and Walrath, D.E. , "Iosipescu Shear Properties of SMC Composite Materials," Composite Materials: Testing and Design (Sixth Conference), ASTM STP 787, I. M. Daniel, Ed., American Society for Testing and Materials, pp. 19-33 (1982).

Wang, S.S. , Goetz, D.P. and Corten, H.T. , "Shear Fatigue Degradation and Fracture of Random Short-Fiber SMC Composite," Journal of Composite Materials, Vol. 18, No. 1, pp. 2-20 (January 1984 ).

Zahlan, N.M. , "Compressive Stability of Delaminated Random Short-Fiber SMC Composites," M. S. Thesis, Department of Theoretical and Applied Mechanics, University of Illinois, Urbana, IL (October 1984).

10.

Wang, S.S. , Suemasu, H. and Zahlan, N.M. , "Interlaminar Fracture of Random Short-Fiber SMC Composite," Journal of Composite Materials, Vol. 18, No. 6, pp. 574-594 (November 1984).

11.

Comninou, M. , "The Interface Crack," ASME Journal of Applied Mechanics , Vol. 44, No. 4, pp. 631-636 (December 1977).

12.

Comninou, M. , "The Interface Crack in a Shear Field," ASME Journal of Applied Mechanics, Vol. 45, No. 2, pp. 287-290 (June 1978).

13.

Wang, S.S. and Choi, I. , "The Interface Crack between Dissimilar Anisotropic Composite Materials," ASME Journal of Applied Mechanics , Vol. 50, No. 1, pp. 169-178 (March 1983).

14.

Wang, S.S. and Choi, I. , "The Interface Crack Behavior in Dissimilar Anisotropic Composite under Mixed-Mode Loading," ASME Journal of Applied Mechanics , Vol. 50, No. 1, pp. 179-183 (March 1983).

15.

Reifsnider, K.L. , Stinchcomb, W.W. , Liechti, K.M. and Ulman, D.A. , "Cumulative Damage Model for Advanced Composite Materials," Final Report, AFWAL-TR-82-4094, Air Force Wright Aeronautical Laboratories, WPAFB, OH (July 1982).

Compressive Stability of Delaminated Random Short-Fiber Composites,Part II—Experimental and Analytical Results

Abstract

Get full access to this article

References