土壤-植物根系复合体本构关系的理论研究

为研究土壤-根系复合体强度问题,运用土壤力学理论和复合材料力学方法分析了土壤-根系复合体的力学特性和力学模型;在弹性、横观各向同性条件下,计算得出了表征土壤-根系复合体应力-应变关系的本构方程。研究结果表明:土壤-根系复合体的强度,不仅与土壤和根系的材料特性、形态结构、含水率以及根系含量有关,而且与土粒和土粒之间、土粒和根系之间的黏聚力、内摩擦力密切相关。

Study on constitutive relation of soil-root composite

To investigate the strength of the soil-root composite in water and soil conservation,the constitutive model of a soil-root composite and its characteristic parameters,based on the fundamental theory of soil mechanics and the basic methods of mechanics of composite materials,was established in this paper.The constitutive equations of the soil-root composite,which express the stress-strain relationship,were derived under the hypothesis of isotropy.The results indicate that the strength of the soil-root composite is not only related to the physical properties,structure,water keeping capacity of soil and plant roots,but also to the friction force and adhesions between soil granules and roots,as well as among soil granules themselves.