机织建筑膜材料的广义Kelvin-Voigt蠕变模型

摘要

The uniaxial tension creep tests of PVC coating membrane with plain architectural are experimented along the warp and weft direction at five different stresses. The general Kelvin -Voigt creep formulas are given. The experimental data are studied through the use of these creep formulas with three, five and seven parameters. The result shows: As the number of the parameters grew, prediction complexity is increased with grade. When the parameter is seven, the coefficients of determination are over 99.9% at different stresses. This shows that the general Kelvin-Voigt creep model with seven parameters can well predict creeping behavior of fabric architectural membrane.%对平纹组织为基布的PVC涂层膜材料进行了经纬两方向各自5种不同应力条件下的单轴向拉伸蠕变试验,给出了广义Kelvin-Voigt模型的具体蠕变方程,并利用广义三参数、五参数与七参数Kelvin-Voigt的蠕变方程对实验数据进行了分析.结果显示:随着模型参数个数的增加,预测效果也呈现出递增趋势；当模型参数为7个时,各应力拟合的确定系数均在99.9%以上,表明七参数广义Kelvin-Voigt蠕变模型已可以很好地预测膜材料的蠕变特性.