Bulk Material-Silo Interaction During Asymetric Flow Initiation

这项研究发展了本构关系，并对大型筒仓散装材料储存产生的内力进行了参数研究。三维非线性有限元离散化分析将采用适当的加载、卸载和材料破坏准则的材料描述，并真实地表示储存的散装材料与筒仓壁之间的界面相互作用(滑移粘结)。分析算法的验证将通过比较在模型筒仓中对称和非对称流动启动时形成的压力分析所获得的数据，以及通过改变料斗角度、料斗结构、出料口宽度、壁面摩擦、散体材料本构关系和分离效应进行的试验所获得的数据来完成。

This research develops constitutive relations and carries out a parametric study of internal forces generated in bulk material storage in large silos. A three-dimensional nonlinear finite element discretization analysis will be made with proper material characterization for loading and for unloading and material failure criteria and with a realistic representation of interface interaction (slip-stick) between the stored bulk material and silo wall. Verification of the analysis algorithm will be accomplished by comparing data obtained from analyzing pressure developed during symmetric and asymmetric flow initiation in the model silo, and from tests performed by varying the hopper angle, hopper configuration, discharge opening width, wall friction, bulk material constitutive relations, and segregation effects.