哈尔滨工业大学2021年博士研究生导师信息：谢志民

How to design the interface is a fundamental issue for the composite materials. Although a little work was concerned with the mechanical design of the interface, the effect of the initial thermal stresses has not been taken into account in those studies. While the thermal stresses due to the manufacturing process and the difference in coefficient of thermal expansion between matrix and reinforcing phase, do play an important role in the properties of the composites. In terms of a concept of the neutral inclusions that do not disturb the prescribed uniform stress field in the surrounding elastic body, the interface parameters are studied with consideration of the effect of an initial thermal stress field in this paper, indicating that the effect of thermal stresses may be eliminated by the design of interface parameters.

Cord-rubber composites are usually subjected to cyclic deformation for the tire applications. Due to the hysteretic nature of the rubber, heat generation in the rubber component under dynamic cyclic loading often causes a rise in temperature, which can deteriorate the physical properties of the composites. Therefore, better understanding of the cord-rubber composites under thermal aging conditions is of great importance for the lifetime prediction. In the present work, the effective modulus of polyester cord- and steel cord-rubber composites at different aging conditions was studied by means of the mechanics of composite materials and the Arrhenius relationship based on the properties of components. It is found that the Halpin-Tsai relation with introducing the effect of thermal aging is also valid for the aged cord-rubber composites. (

There has been considerable interest in inflatable space structures in last decades due to their potential application for such advantages as lightweight and high folding efficiency. As a relatively simply element, the inflatable tube has been studied in some aspects, e.g. the rigidizable materials, the mechanical properties and deploying characteristics. To achieve ultra lightweight and lower the heating energy for the thermally cured rigidizable materials, an inflatable tube with a rigidizable web is designed; and then the critical load and overall stiffness of the rigidized tube are analyzed by using finite element method (FEM). It is found that the mechanical properties of the tube are not sensitive to the material anisotropy, but to the winding angle of rigidized cord and the ratio of length to diameter of the tube.