牛奶纤维的力学性能及模拟分析

The Basic Mechanical Properties and Model of Milk Fibers

为了研究牛奶纤维的基本力学性能,本文采用各种不同实验仪器对牛奶纤维及相关纤维的基本性能进行了测试分析。通过对各种性能分析比较,可以得出牛奶纤维在干态和湿态下的断裂强度小于腈纶纤维,断裂伸长率与腈纶接近。牛奶纤维在湿态下断裂强度下降,断裂伸长率增加。牛奶纤维在钩接和结节拉伸状态下,其断裂强度和断裂伸长率均有不同程度的下降。对于直接拉伸,最佳模型为四元件非线性粘弹模型,对于结节拉伸,最佳模型为四元件非线性粘弹模型和Vangheluwe模型,对于钩接拉伸,最佳模型为四元件非线性粘弹模型。

In order to understand the mechanical properties of the milk fibers, the basic properties of the milk fibers are measured with different instruments. By the analysis of the results, the following conclusions can be deduced： in the dry and wet state, the breaking strength of the milk fibers is lower than that of the acrylic and the breaking elongation is near to that of the acrylic. In the wet state, the breaking strength of the milk fibers is lower and the breaking elongation is higher than that in dry state. The tenacity and elongation at break in looped configuration are remarkably reduced. All these three models fit reasonably well with the experimental results, but there are some models that fit better. For straight modality the best fit corresponds to the four nonliner viscoelasticity model. For knotted modality the best fit corresponds to the four nonliner viscoelasticity model and the Vangheluwe model, and for looped test, the best fit corresponds to the polynomial model.