Abstract: A discrete element method contact model building method includes: selecting a filling body in a disaster-causing structure to obtain a change rule of cumulative loss of the filling body; performing test simulation, and determining a relation function of each group of corresponding mesoscopic mechanical parameters in each time period and mesoscopic parameters of a DEM contact model representing a change rule of macroscopical parameters of the filling body; embedding each mesoscopic parameter relation function into an existing particle contact model, performing test simulation, and updating a fracture failure criterion of the contact model according to a corresponding relation of macro-mesoscopic strength during model failure; and based on a seepage failure indoor test, building a seepage failure discrete element calculation model, and simulating the seepage failure process of a rock and soil mass by using the obtained particle contact model and the fracture criterion of the particle contact model.

Abstract: The embodiments of the present disclosure relate to the technical field of manufacturing display device, and disclose a backlight golden finger structure and a display device. The backlight golden finger structure includes: a plurality of golden finger bodies, one end of each golden finger body being configured to be connected with a backlight flexible circuit board, the other end of each golden finger body being overhung and configured to be connected with a display panel flexible circuit board at a first surface of the backlight golden finger structure; and a first covering film disposed on the first surface of each golden finger body, an edge of the first covering film adjacent to the overhung end of the golden finger body being in a curved shape.

Abstract: The embodiments of the present disclosure relate to the technical field of manufacturing display device, and disclose a backlight golden finger structure and a display device. The backlight golden finger structure includes: a plurality of golden finger bodies, one end of each golden finger body being configured to be connected with a backlight flexible circuit board, the other end of each golden finger body being overhung and configured to be connected with a display panel flexible circuit board at a first surface of the backlight golden finger structure; and a first covering film disposed on the first surface of each golden finger body, an edge of the first covering film adjacent to the overhung end of the golden finger body being in a curved shape.