定义 动态弹性模量dynamic modulus of elasticity对于线性、粘弹性材料,使其作正弦波应变时,由于分子重排需要时间,因而所产生的应力和应变相位不同,从相位分析可知,应力可包括两部分,一部分与应变同相位,另一部分与应变相位差为90°,用应变去除就可将模量分成同相(实部)和异相(虚部)成分,其关系为F=E'+aE'',F为复数杨氏弹性模量,通常把它的模称为动态弹性模量。一般情况下,E''比E'小得多,F的模可近似地等于E',把该值近似作为动态弹性模量。
将求得的各龄期的动态弹性模量与相应的试验数据相比较,验证方法的可行性。
Comparing the dynamic modulus of elasticity of the model in each age with the corresponding values of the test data, we can verified the feasibility of the method.
考察了静力拉伸弹性模量与动态弹性模量的差别,以及弹性模量对该材料等温低周疲劳性能参数的影响。
The difference between static elastic modulus and dynamic elastic modulus was investigated. The effects of elastic modulus on parameter of low cycle fatigue were studied also.
介绍了脉冲锤击法检测实木地板损伤及测定其动态弹性模量的理论依据,并通过有限元模拟与试验验证了其可行性。
The theoretical basis of pulse hammer excitation method used to detect the damage and measure the dynamic elastic modulus of solid wood flooring is briefly explained.
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