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试验表明,水田土壤具有显著的流变特性。本文归纳了国内外一些著名学者的研究成果,评述了他们的理论方法,认为由基本流变元件组合而成的经典流变模型并不能很好地表达水田土壤的应力——应变——时间关系,只有弹——粘塑性力学模型才能比较圆满地解决这一问题,建议采用由Drucker—Praqer破坏包线和椭圆屈服帽盖所组成的粘塑性模型,它形式简单,易于纳入计算机程序。
Experiments show that paddy soil has significant rheological properties. This paper summarizes the research results of some famous scholars both at home and abroad, reviews their theoretical methods, and argues that the classical rheological model formed by the combination of basic rheological elements can not well express the stress-strain-time relationship of paddy soil Only the elastic-viscoplastic model can solve this problem satisfactorily. It is suggested to use the viscoplastic model composed of Drucker-Praqer damaged envelope and elliptical yield cap, which is simple in form and easy to incorporate into the computer program.