Failure of unidirectional boron-reinforced aluminum composites in compression

The authors examine a composite material consisting of an aluminum matrix with plastic properties, assuming that the stress and strain intensities are linked by a power dependence and of elastic fibers with Young's modulus E. when using the continuous approach, the fiber-reinforced composite material is replaced by a transversely isotropic material. Application of equations of the three-dimensional elasticity theory are used which leads to a lower estimate of the limiting strains. It is shown that the application of the three-dimensional linearized theory of stability to calculate unidirectional fiber-reinforced composite materials with the aluminum matrix and boron fibers is highly efficient; it is possible to predict the ultimate strength in compressive loading along the reinforcement direction