Manufacturing method of memory alloy balanced-load connecting damping element

Abstract

The invention discloses a manufacturing method of a memory alloy balanced-load connecting damping element, which relates to a manufacturing method of a damping element. The invention solves the problems that the current composite materials have high brittleness, performance anisotropy, easy lamination in mechanical processing, poor local strength and complex joint stressing, and once a component is overloaded locally, the whole component can be quickly damaged due to stress concentration. The manufacturing method comprises the following steps: (1) carrying out cold rolling to deform TiNi memory alloy by more than 20%, then annealing at 300DEG C-550DEG C for 1 hour, then mechanically processing, and then carrying out constraint aging to obtain the element; and (2) putting the element into liquid nitrogen and then putting into boiled water repeatedly for 20-100 times to obtain the memory alloy balanced-load connecting damping element. The balanced-load connecting damping element prepared by the method of the invention simultaneously has superior super-elasticity (the constant elasticity strain can reach 8% and the high upper plateau stress is greater than 490MPa) and excellent damping behavior, can realize perfect balanced-load connection, and avoids the problem of failure breakage caused by local stress concentration.

Description

technical field [0001] The invention relates to a method for manufacturing a damping element. Background technique [0002] At present, the steel thread structure used in mechanical connection often fails due to stress concentration caused by vibration during machine operation. Especially in aviation, aerospace, automobile and other fields, composite materials are widely used, but due to the anisotropy and brittleness of composite materials, they are more likely to generate stress concentration when subjected to vibration, resulting in crack initiation and damage, which seriously affects the entire system. safety and reliability. For example, resin-based carbon fiber composites have the advantages of light weight and high strength. They are the preferred materials for aerospace structures and have been widely used. However, this kind of composite material is brittle, has anisotropic properties, is easy to delaminate during machining, has poor local strength, and the stress...

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problems of high brittleness, anisotropy in properties, easy delamination in mechanical processing, poor local strength, complex stress on joints in existing composite materials, and once a component is partially overloaded, the entire component will be destroyed rapidly due to stress concentration, and provides A method for manufacturing a memory alloy load sharing connection damping element

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