非织造土工织物用于公路补强时的弹塑性损伤计算

The Calculation of Elastoplastic Damage with Non-woven Geotextiles Used in Road Reinforcement

非织造土工织物由于其特有的薄层网状结构及良好的力学性状 ,在路基路面排水及补强等工程中得到了广泛的应用。但生产过程中的针刺工艺使它同时也受到初始损伤及产生高的孔隙率。

Non-woven geotextiles are widely used in subgrade and pavement drainage and reinforcement on account of its specific net structure and well mechanical behavior.Initial damage and high porosity are caused by the needle-punching technice,so the theory of damage mechanics can be used in the study of its mechanical behaviors.This paper lists the following contents in the case of uniaxial tensile stress:elastoplastic damage variable and evolvement equations,function equations of damage strain,damage constructive equations and determining coefficient of damage strength.Some examples are also presented.