应力松弛试验中初始坡度对非粘滞阻尼模型参数的影响

Infiuence of Initial Ramp on Parameters of Nonviscously Damped Model in Relaxation Tests

摘要:

文章将非粘滞阻尼模型的松弛函数分为 2种形式进行研究讨论:一种是幂指数函数的形式,另一种是指数函数的形式。以应力松弛试验为例,从理论和试验 2个角度考虑初始坡度,都可以看出初始坡度对应力变化的影响,从而克服了忽略这一问题带来的误差。

Abstract:

In this paper, the relaxation function of non-viscous damping model was divided into two forms. One was thatthe relaxation function was a power exponential function, the other was an exponential function. Taking stress relaxationtest as an example, the problem was overcomed by considering the initial slope from both theoretical and experimental per?spectives, the influenced of initial slope on stress variation can be seen, thus overcoming the error caused by neglectingthis problem.