土工合成材料拉伸性能模拟及模型分析

为进一步探讨土工合成材料拉伸力学性能,运用标准线性模型,非线性三元件模型和Kawabata改进模型对几种代表性土工合成材料(针刺、机织和土工格栅)进行拉伸性能的模拟并建立各自初步的应力应变关系模型。对各种材料的不同模型曲线和实测曲线比较发现,几种模型模拟效果有所差异即不同类型土工合成材料应采用不同模型进行模拟。标准线性模型和非线性三元件模型能较好表征针刺织物拉伸性能,Kawabata改进模型适用于机织物,但要模拟土工格栅拉伸性能,几种模型有待改进和完善。

The Analysis of Tensile Property Modeling for Geosyntheics

To study the mechanics property of the several represented geosynthetics, we imitated their tensile properties by using the standard linear model, the nonlinear model and Kawabata's model. The strain-stress relation and imitating parameters of the each geosynthetics were deduced. Compared the model curves with the actual curves for geosynthetics, we find Kawabata's model is appropriate for woven materials and the others fit for needle-punched nonwovens. And mentioned models need to modify for modeling tensile property of geogrids.