5 results about "Stress bone" patented technology

This application discloses a method, apparatus, and electronic device for predicting fracture strain in metallic materials. The method includes first determining the stress triaxiality and Lode angle of the metallic material under test based on the stress state at the test point; then constructing a stress fracture prediction model based on the correlation function between fracture strain and stress triaxiality and Lode angle; next, coupling this model with the Johnson-Cook fracture model to form a thermo-mechanical-strain rate coupled fracture prediction model; and finally, determining the target fracture strain based on this model. This approach not only overcomes the limitation of insufficient consideration of the Lode angle in existing fracture models but also achieves efficient model construction with very few parameters to be calibrated. The model is applicable to fracture prediction under complex stress, high temperature, and high strain rate multi-field coupling, significantly improving prediction accuracy while enhancing the model's engineering applicability and robustness, providing a reliable fracture assessment tool for cutting-edge engineering scenarios such as advanced manufacturing and extreme environment equipment design.

The utility model discloses a portal frame structure which comprises a cross beam and supporting legs, a reinforcing rib is arranged on the top face of the cross beam in the length direction, and an unloading groove with an upward opening in the vertical direction is formed in the top end of the reinforcing rib so that the section of the reinforcing rib in the width direction can be in an M shape. The reinforcing ribs are arranged on the top surface of the cross beam of the gantry crane in the length direction, and the unloading grooves with the upward openings in the vertical direction are formed in the top ends of the reinforcing ribs, so that the sections of the reinforcing ribs in the width direction are M-shaped, the rigidity of the cross beam can be improved, the risk of stress fracture is reduced, and the cross beam is better reinforced.

The application relates to the technical field of sports medical image processing, and discloses a long-distance running crowd ankle joint injury early warning method fusing MRI and running postures, which comprises the following steps: constructing a personalized pore charge two-parameter cartilage model based on an MRI sequence; acquiring a double-state gait mechanics parameter set and calculating a compensation transfer tensor; extracting a representative volume unit to construct a micro-response surface proxy model; performing double-closed-loop evolution simulation by using the micro-response surface proxy model and the compensation transfer tensor, and outputting a long-range evolution trajectory matrix; and solving a fluid support rate attenuation evolution sequence, positioning a stress fracture high-risk spatial positioning point, and outputting a three-dimensional risk distribution cloud diagram. The application solves the force consumption by transforming a partial differential equation by using a proxy model, combines a double-closed-loop control mechanism of micro-fluid evolution and macro-gait compensation, eliminates stress divergence defects caused by constant load input, and improves the prediction accuracy of the stress fracture spatial positioning point.

The utility model relates to the technical field of adaptive stress bone external fixation frame production, in particular to an arc degree detection device on an adaptive stress bone external fixation frame. The utility model aims to provide a device for detecting the arc degree of an adaptive stress bone external fixation frame, namely a device for detecting the arc degree of the adaptive stress bone external fixation frame, which comprises a detection table, a depth dial indicator, a matching table, a supporting table, a strip-shaped pressing block and a lamp strip, and is characterized in that the matching table is mounted on the upper surface of the detection table; the upper surface of the matching table is provided with a plurality of semicircular through grooves which are different in diameter and matched with the metal intramedullary needle, the upper surface of the supporting table is provided with a pressing threaded hole and a supporting threaded hole, a supporting bolt is arranged in the supporting threaded hole in a matched mode, the depth dial indicator is installed on the detection table, and the lamp strip is installed on the detection table through the lamp strip fixing base. The detection device is simple in structure, high in universality, convenient to operate and low in cost.

The utility model relates to a magnetic anastomat which comprises two annular carriers. Annular inner cavities are formed in the two annular carriers, and magnetic rings are arranged in the annular inner cavities; a plurality of sets of nail outlet holes are annularly formed in the anastomosis face of the annular carrier, the wall face where the anastomosis face is located is made of flexible materials, and the anastomosis nails are embedded in the nail outlet holes in an interference mode. And when the anastomosis surfaces of the two annular carriers are close to each other, the two magnetic rings attract each other and extrude the flexible material and push the anastomosis nail, so that anastomosis is realized. The two annular carriers push the anastomosis nails through magnetic force to connect the intestinal tracts at the two ends together, and the two annular carriers continuously apply pressure to the two connected sides of the intestinal tracts through magnetic force, so that the situation that an anastomotic stoma is stressed and broken due to the fact that the intestinal tracts are subjected to external force in the healing process is avoided; therefore, leakage of the anastomotic stoma is avoided.