A three-dimensional braided composite material prosthesis and its preparation method

Abstract

The invention discloses a three-dimensionally woven composite prosthesis and a production method thereof. Three-dimensionally woven composite foot and shank prosthetic members are produced by combining various three-dimensionally woven structures through various high-performance fibers. After leg or foot prosthetic member three-dimensional pre-produced fabric is woven, secondary placement reinforcing is carried out by using specific fibers in the thickness direction of the pre-produced fabric; meanwhile, metal reinforcing parts or composite members are inserted for reinforcing in frequently bend-resistant and pressure-resisting parts of the prosthetic members so that the ability of the parts to resist fatigue load; finally, thermosetting resin glue is used as a base to impregnate the above-mentioned pre-produced fabric for compositing and fixing. Through the structural design of the leg and foot prosthetic members and the formation of the combined three-dimensionally woven composite, overall mechanical properties and fatigue load resistance of the composite prosthesis are effectively improved at the premise that the prosthetic members are light in weight and portable, and it is possible for improve prosthesis preparation efficiency and prolong prosthesis life.

Description

technical field [0001] The invention relates to a composite material prosthesis, in particular to a resin-based composite material leg and foot prosthesis reinforced with a three-dimensional braided fiber fabric and a preparation method thereof. Background technique [0002] Rehabilitation medicine is a relatively interprofessional comprehensive discipline in medicine, which integrates advanced knowledge and technology of multiple disciplines such as medical engineering, bioengineering, bionics and composite material science. Among them, rehabilitation engineering technology can be used in key product fields such as prosthetics and orthotics, which is of great significance for improving the quality of life of disabled people and ensuring the normal progress of learning and professional labor. In recent years, high-performance fiber-reinforced composite materials have been widely used in the field of prosthetics. Composite materials made of high-molecular polymer resins and r...

AI Technical Summary

Problems solved by technology

First, the commonly used fiber arrangement reinforcement method is plain weave, twill or satin weave, which is laminated in the thickness direction and then molded by resin impregnation. The composite material of this plane fabric has greater rigidity, but the combination of layers The weak force limits the stability of its mechanical properties as a sports joint, especially the preparation of foot prostheses using the flat fabric composite material of this molding method, which cannot adapt to long-term frequent bending fatigue loads; second, the use of high-performance fibers Unidirectional arrangement of impregnated resin glue to form a prepreg tape, through the two-dimensional winding structure of fibers and dry vacuum introduction molding method and preparation of composite prosthetic structural parts of the foot or leg, the unidirectional arrangement of fibers is very important for the foot The improvement of fatigue bending load has obvious advantages, but the leg prosthesis formed by two-dimensional fiber winding technology cannot resist the compressive load brought by the body weight for a long time, which makes the component life and mechanical stability of the leg prosthesis tested

[0004] At present, the common three-dimensional composite prosthesis is only woven with carbon fiber or other fibers, and is not designed for the structure and force characteristics of the foot and leg. Therefore, the mechanical properties of the obtained prosthesis are not ideal, and the service life is short. Therefore, there is an urgent need for a new type of three-dimensional braided composite prosthesis

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