Experimental investigation on the flexural behavior of aluminum alloy-reinforced wood plastic composite hollow members

Abstract

An aluminum alloy-reinforced wood plastic composite flexural hollow member was proposed to overcome the low strength utilization efficiency caused by the poor creep performance of wood plastic composite, and the significant reduction of strength and elastic modulus after heating up. The uniaxial tensile experimental test of 6 composite tensile specimens of aluminum alloy-reinforced wood plastic composite and the flexural capacity trial of 4 groups of different spans were carried out in this paper. The results show that the strength and elastic modulus of the composite tensile test pieces can be calculated equivalently according to the stiffness and strength contribution of the wood plastic composite and aluminum alloy. The bearing capacity and flexural stiffness of the bending members decrease with an increasing span. The strain of all specimens agrees with the assumption of the plane section, and no shear lag effect emerges after applying force to the aluminum alloy-reinforced wood plastic composite hollow members. The sections of the samples were transformed into I-sections through stiffness equivalence when calculating the bending bearing capacity of the members. The equivalent parameters were brought into national codes for calculation, and the computed results of the European standard show the best agreement with the experiment results.