Research on the Structure and Simulation of Mechanical Properties of New Silk Material with Three-Dimensional Crimp Structure
|Keywords||three-dimensional crimp silk Mechanical model|
By both special physical and chemical processing, a new silk material with three-dimensional coil structure was formed. Study on structure and mechanical properties of the three-dimensional crimp silk was carried. The elastic elongation and elasticity recovery rate of silk with three-dimensional crimp structure were improved after modification, which effectively solved the problem of silk easy to wrinkle reduction.The effects of processing temperature, time and the concentration of chemical on the structure of three-dimensional crimp silk were respectively discussed in following aspects, breaking strength, elongation of new materials and the impact of the elastic elongation.The optimized technics were: the liquid concentration is 1.41Kg/m~3, the treating temperature is 95℃and the treating time is 5min.A four-parameter non-linear viscous elastic model, consisting of Maxwell,linear spring and nonlinear spring elements, was proposed for the first time to test the tensile properties of three-dimensional crimp silk. It was proved that theoretical expectations and experimental results were consistent. Models therefore can predict the silk tensile properties of new materials.Meanwhile, mechanical model of three-component simulation of stress relaxation and creep properties of three-dimensional crimp silk was applied first. Results showed that mechanical model of three-component can be a good simulation of stress relaxation and creep properties of the material.