10 results about "Stress bone" patented technology

A railroad car truck including one or two new side frames that each includes one or more of a plurality of different improvements that individually and in various combinations reduce, inhibit, or minimize the likelihood of stress fractures or cracks in the side frame.

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 discloses an ulna coracoid process bone fracture plate through anterior approach, bone setting of ulna coracoid process is achieved through anterior approach, the bone fracture plate is of a T-shaped structure, the total length of the bone fracture plate is smaller than 2.5 cm, the bone fracture plate comprises an adaptive plate and a fixing plate which are in angle connection, the adaptive plate is located above the fixing plate, the adaptive plate is used for being matched with a far-end lateral column of the ulna coracoid process, and the fixing plate is used for being matched with the far-end lateral column of the ulna coracoid process. The adaptive plate comprises a positioning hole and suture holes formed in the two sides of the positioning hole; the fixing plate is narrower than the adaptive plate, an adjusting hole and a fixing hole are formed in the fixing plate, the adjusting hole is located between the positioning hole and the fixing hole and used for achieving adaptive adjustment of the bone fracture plate and the far-end outer side column, and the total length is the total distance between the top end of the adaptive plate and the bottom end of the fixing plate. According to the bone fracture plate, the matching stability of the bone fracture plate and the front portion of the elbow joint after bone fracture is improved, stimulation to local soft tissue is reduced, the contact area between the bone fracture plate and ulna coracoid processes is increased, the fixing strength between the bone fracture plate and the ulna coracoid processes is improved, the postoperative healing effect is improved, and the stress fracture risk is reduced.

The present invention discloses a force-exerting movable part, a removable orthodontic appliance, and a process for preparing the orthodontic appliance. A plurality of hollow structures are provided on the force-exerting movable part, and the force-exerting movable part forms a hollow part and a solid part; the solid part has a plurality of curved structures for releasing the correction force. Sufficient gap space can be provided between the force-exerting movable part and the bracket and the tooth surface, thereby ensuring the cleaning effect and difficulty of the oral cavity and reducing the oral cleaning burden of the patient. The connection between the force-exerting movable part and the bracket is stable, and the number of curved structures provided is greater, which can release sufficient correction force. Compared with two independent correction wires respectively assembled on the bracket, the integrated structure significantly improves the strength of the force-exerting movable part, and the force-exerting movable part is less likely to suffer from stress fracture, thereby increasing the service life of the correction wire; the integrated structure also reduces the risk of the force-exerting movable part sliding and loosening in the mouth.

The invention discloses a distribution bottle cap which comprises a base (1), a pressing key (2) and a cavity bottom (3) arranged in the base. The base (1) comprises a first opening (102) at one end and a second opening (103) at the opposite end. The pressing key (2) comprises a flexible pressing part (21), a connecting part (22) and a puncturing part (23). The connecting part (22) is circumferentially arranged around the pressing part (21), and the puncturing part (23) extends from the pressing part (21). The connecting part (22) is arranged at the first opening (102), and the connecting part (22), the pressing part (21), the base (1) and the cavity bottom (3) form a sealed containing cavity (101). The invention achieves a progressive, directional piercing from point to line by means of a simultaneous breaking and pushing process, thereby reducing the force required to break the chamber bottom (3), i.e. The stress breaking chamber, and ensuring a smoother dispensing of the preloaded substance. Meanwhile, the invention does not need to compromise the structural robustness of the chamber bottom (3), thereby enabling reliable storage of substances, including those requiring fine processing and preservation.

Provided in the present invention are a method and system for widening a drilling safety pressure window, and a device and a storage medium. The method comprises the following steps: predicting distribution features of underground leakage-prone natural fractures; on the basis of the distribution features of the natural fractures, acquiring the locations and occurrences of the leakage-prone fractures, and predicting the leakage pressure; and respectively predicting fractures and crushed zones, and fracture shear deformation and destruction, optimizing a well location and a well trajectory on the basis of a prediction result, avoiding open-type fracture regions, selecting a region having a relatively high leakage pressure as a well point location and a wellbore trajectory, and using same for widening a safety pressure window. In the present invention, mechanical means are used to reduce the collapse pressure and extend a lower limit, so that broad adaptability and a high success rate are achieved, the problem of drilling safety pressure window widening of ultra-deep, high-pressure and high-stress fractured formations can be effectively solved, and the present invention is conducive to solving the drilling safety problems of kicking, leakage, sticking, etc., and is also conducive to reducing drilling costs, protecting the environment, and effectively avoiding reservoir damage.

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.