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聚合物(包括塑料,橡胶及纤维等)及其复合材料,作为一类性能优良的结构材料,在国民经济各个领域得到日益广泛的应用。人们希望对这类材料的性能,特别是力学性能有更多的了解。我们知道,聚合物具有粘弹性行为,与金属材料不同,它的力学行为具有强烈的温度和时间依赖性。因此,要全面了解这类材料的力学性能,就必须在一定温度范围及一定时间间隔内测量其力学行为的变化,再通过粘弹性理论来描述其力学性能。应力松驰是研究粘弹性行为的一种常用
Polymers (including plastics, rubbers and fibers, etc.) and their composites, as a kind of excellent structural material, are widely used in various fields of national economy. People want to know more about the properties of these materials, especially their mechanical properties. We know that polymers have viscoelastic behavior, and unlike metallic materials, their mechanical behavior has a strong temperature and time dependence. Therefore, to fully understand the mechanical properties of these materials, it is necessary to measure the change of mechanical behavior in a certain temperature range and time interval, and then to describe its mechanical properties through viscoelastic theory. Stress relaxation is a common study of viscoelastic behavior