Micromechanical Modeling of Composite Compressive Strength

Composite compressive failure is studied using a micromechanical (beam-on-elastic foundation) model, and the stiffness of the foundation is determined through an elasticity solution of the foundation model problem. An explicit expression has been derived for evaluation of composite longitudinal compressive strengths (CLCS). It is found that this expression predicts relatively lower CLCS compared to classical models, and closely matches some experimental data for carbon fiber/epoxy composites. It is found that a complete matrix slippage will reduce the CLCS by over 50%.

[1]  Zvi Hashin,et al.  Thermoelastic properties of fiber composites with imperfect interface , 1990 .

[2]  L. Greszczuk,et al.  Microbuckling Failure of Circular Fiber-Reinforced Composites , 1974 .

[3]  A. M. Waas,et al.  A mechanical model for elastic fiber microbuckling , 1990 .

[4]  Anthony M. Waas,et al.  Effect of interphase on compressive strength of unidirectional composites , 1992 .

[5]  Dimitris C. Lagoudas,et al.  A New Approach to Microbuckling of Fibrous Composites , 1991 .

[6]  L. Greszczuk,et al.  On Failure Modes of Unidirectional Composites Under Compressive Loading , 1982 .

[7]  S. L. Pu,et al.  Buckling of Microfibers , 1967 .

[8]  Rene B. Testa,et al.  The Elastic Stability of Fibers in a Composite Plate* , 1969 .

[9]  H. Schuerch,et al.  Prediction of compressive strength in uniaxial boron fiber-metal matrix composite materials. , 1966 .

[10]  Paul S. Steif,et al.  A Simple Model for the Compressive Failure of Weakly Bonded, Fiber-Reinforced Composites , 1988 .

[11]  Paul S. Steif,et al.  An exact two-dimensional approach to fiber micro-buckling , 1987 .

[12]  C. C. Chamis,et al.  Simplified composite micromechanics equations for hygral, thermal and mechanical properties , 1983 .

[13]  Akhilesh Maewal,et al.  Postbuckling behavior of a periodically laminated medium in compression , 1981 .

[14]  K. Lo,et al.  Compressive Strength of Unidirectional Composites , 1992 .

[15]  Leonard R. Herrmann,et al.  Response of Reinforcing Wires to Compressive States of Stress , 1967 .