202 results about "Fracture failure" patented technology

A fastener for insertion into pierced openings of a tissue wound has a body formed of a generally bioabsorbable polymer defining an initial capture area internal to the body. The body includes a pair of arms, each with an inwardly projecting cleat operably joined at an elbow portion defining an internal elbow angle. The arms are operably joined to a backspan at a shoulder portion defining an internal shoulder angle. A durable tissue retention zone is defined between the cleat and the arm. The elbow portion and the internal elbow angle define an insertion width greater than a width of the pierced openings resulting in the pierced openings stretching over the cleat and being elastically retained within the durable tissue retention zone. The fastener initially captures wound tissue in the initial capture area and then dynamically reforms in response to lateral stresses applied by the wound tissue without a fracture failure of the fastener until a minimum degradation period.

The invention provides a DEM (Digital Elevation Model) contact model construction method for reflecting weakening of seepage to rock-soil mass strength, which comprises the following steps: selectinga filling body in a disaster-causing structure to obtain a change rule of accumulated loss amount of the filling body along with time under the action of seepage and a change rule of mechanical parameters of the filling body along with the loss amount of the filling body; carrying out test simulation, and determining a relation function of each group of corresponding mesomechanics parameters in each time period and DEM contact model mesomechanics parameters capable of representing the change rule of the macromechanics parameters of the filling body; embedding each mesoscopic parameter relationfunction into an existing particle contact model, carrying out test simulation, and updating the fracture failure criterion of the contact model according to the corresponding relation of macro-mesoscopic strength when the model is damaged, so as to realize the simulation of the continuous weakening process of the filling body strength; and based on an indoor seepage failure test, establishing aseepage failure discrete element calculation model, and simulating the seepage failure process of the rock-soil body by adopting the obtained particle contact model and the fracture criterion thereof.