触变性流体在振荡载荷作用下的响应

RESPONSE OF THIXOTROPY FLUID UNDER OSCILLATORY LOADING

  • 摘要: 采用Moore型触变性流体本构方程,研究了振荡载荷作用下的应力响应. 发现:(1)稳态情况下,描述流体内部结构状态的参量为时间的周期函数;(2)剪应力和剪应变率之间关系为一闭合的滞后环.

     

    Abstract: The constitutive equation of thixotropic fluid was of the Moore'smodel in this paper. The mechanical behaviors under oscillatory loadingwere discussed. The finite difference method was used. The results show that: 1) In the steady state, the parameter whichdescribed the internal structural state in the fluid was the periodicfunction of time; 2) The relation between the stress and the strain was aclosed hysteretic cycle. These properties show that the thixotropicfluid is much more complex than the other non-Newtonian fluids.

     

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