Experimental Study on Axial Thermal Expansion of Composite Thin-walled Tube

Abstract

Carbon fiber reinforced composite thin-walled tubes have the characteristics of light weight, high strength and small deformation, and are widely used in aviation, aerospace and other fields. Under the working conditions of high and low temperature, the thermal deformation of tube will directly determine the service reliability of their constituent structures. It is necessary to accurately measure the thermal expansion performance of composite thin-walled tube and reasonably evaluate the stability of their constituent structures. When the existing thermal expansion performance measurement system measures the thermal expansion of tube, there are problems of sampling damage to the structural state and failure to effectively contact the end face of tube in real time. For the above situations, A method for measuring the axial thermal expansion performance of composite thin-walled tube is proposed, and the measurement system is built. The thermal expansion performance of thin-walled tube is successfully and effectively evaluated, and the error of the measurement system is reasonably evaluated using the standard parts with known thermal expansion coefficient.