THE PHYSICAL MODEL OF THE STRUCTURE OF THE GFRP BAR AND THE PREDICTION OF ITS TENSILE PROPERTIES

摘要

The physical model of the structure of the GFRP bar is proposed under a certain simplifying condition and it consists of the internal polymer cylinder which is reinforced by its unidirectional glass fiber and the exterior polymer cylinder which is formed by the winding of unidirectional glass fiber. The prediction formulas of axial and circumferential tensile modulus and strengths are proposed and they are used to predict the axial and circumferential tensile modulus and strengths and the results of them are compared with the results which are obtained by measurement. The effects of the changes of different parameters on the axial and circumferential tensile modulus and strengths are studied and the significance of the physical model, the prediction formulas of axial and circumferential tensile modulus and strengths are described.