Connecting method of connected part

Abstract

The invention provides a connecting method of a connected part. The method comprises the following steps: (1) preparing a T-shaped shape memory alloy with a high phase transition temperature for serving as a connecting rod and a memory alloy with a low phase transition temperature for serving as a fastening ring, inserting the end part of the connecting rod into a connecting hole of the connected part, and arranging the fastening ring on the connecting rod in a sleeving manner in order that the connected part is positioned between the connecting rod and the fastening ring; (2) heating the end part of the connecting rod, increasing the diameter of the connecting rod and gradually reducing the inner diameter of the fastening ring at the room temperature in order to fix the connecting rod together with the fastening ring and realize impact-free connection of the connected part. In the connecting method, impact-free connection with pre-tightening force is adopted, and uniform interference can be formed on an entire riveting part, so that the fatigue life gain of the connected part is increased.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a connection method for connected parts. Background technique [0002] Resin-based composite materials have unique advantages such as high specific strength and specific modulus, strong designability, and good fatigue resistance, and are widely used in the aerospace field. In applications, resin-based composite materials are often connected with traditional metal skeletons, and the connection forms are mostly openings and rivets. The opening of the hole cuts the fiber reinforcement in the composite material, and at the same time forms a high-stress area at the edge of the hole. After the hole is opened, the composite material is generally mechanically connected together by aluminum alloy or titanium alloy rivets. The impact effect, and the anisotropy of the composite material plate makes the edge area of ​​the hole produce peeling stress due to the edge effect when impacted, w...

AI Technical Summary

Problems solved by technology

The opening of the hole cuts the fiber reinforcement in the composite material, and at the same time forms a high-stress area at the edge of the hole. After the hole is opened, the composite material is generally mechanically connected together by aluminum alloy or titanium alloy rivets. The impact effect, and the anisotropy of the composite material plate makes the edge area of ​​the hole produce peeling stress due to the edge effect when impacted, which significantly reduces the static strength of the structure; at the same time, the traditional aluminum alloy riveting belongs to gap connection, no interference, No preload, poor fatigue life gain