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Cu-Al-Mn shape memory alloy damping and energy-absorbing device for civil construction and manufacturing method thereof

A cu-al-mn, civil construction technology, applied in building components, anti-vibration and other directions, can solve the problems of poor durability of shock absorbers, poor self-resetting performance, limited dissipation capacity, etc., and achieve good damping performance and self-resetting ability. Excellent, strong energy absorption effect

Active Publication Date: 2015-08-26
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a functional anisotropic Cu-Al-Mn shape memory alloy shock absorber for civil engineering and its manufacturing method, which solves the problem of poor durability, limited dissipation capacity, and self-damping of existing shock absorbers. Problems of poor reset performance, low strength, and limited support capacity

Method used

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  • Cu-Al-Mn shape memory alloy damping and energy-absorbing device for civil construction and manufacturing method thereof
  • Cu-Al-Mn shape memory alloy damping and energy-absorbing device for civil construction and manufacturing method thereof
  • Cu-Al-Mn shape memory alloy damping and energy-absorbing device for civil construction and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0041] Adopt preparation process described in the present invention to prepare wide 50mm thick 4mm Cu 72 Al 18 mn 10 (at.%) alloy plate, the properties along the parallel and perpendicular solidification directions are shown in Table 1, the superelastic recoverable strain in the parallel solidification direction reaches 18%, the yield strength is 228.5MPa, and the superelastic recoverable strain in the perpendicular solidification direction reaches 9%, the yield strength is 312.1MPa, cut a plate with a length of 150mm, the length direction of the plate is along the solidification direction, press figure 1 The fabricated device is shown. The maximum bearing strain of the device in the horizontal direction is 18%, the maximum bearing strain in the vertical direction is 9%, and the maximum bearing pressure is 312MPa.

[0042] Table 1 Columnar grain structure Cu 72 Al 18 mn 10 Performance parameters of alloy plates parallel and perpendicular to solidification direction

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Embodiment 2

[0045] Adopt preparation process described in the present invention to prepare wide 50mm thick 5mm Cu 72 Al 17 mn 11 (at.%) alloy plate, the properties along the parallel and perpendicular solidification directions are shown in Table 2, the superelastic recoverable strain in the parallel solidification direction reaches 16%, the yield strength is 268.9MPa, and the superelastic recoverable strain in the perpendicular solidification direction reaches 8.5%, the yield strength is 349.3Mpa, cut the plate with a length of 130mm, the length direction of the plate is along the solidification direction, according to figure 1 The fabricated device is shown. The maximum bearing strain in the horizontal direction of the device is 16%, the maximum bearing strain in the vertical direction is 8.5%, and the maximum bearing pressure is 349Mpa.

[0046] Table 2 Cu columnar grain structure 72 Al 17 mn 11 Performance parameters of alloy plates parallel and perpendicular to solidification di...

Embodiment 3

[0049] Adopt preparation process described in the present invention to prepare the Cu of wide 40mm thick 4mm 71 Al 20 mn 9 (at.%) alloy plate, the properties along the parallel and perpendicular solidification directions are shown in Table 3, the superelastic recoverable strain in the parallel solidification direction reaches 10%, the yield strength is 298.9MPa, and the superelastic recoverable strain in the perpendicular solidification direction reaches 7.5%, the yield strength is 382.1MPa, cut a plate with a length of 140mm, the length direction of the plate is along the solidification direction, press figure 1 The fabricated device is shown. The maximum bearing strain of the device in the horizontal direction is 10%, the maximum bearing strain in the vertical direction is 7.5%, and the maximum bearing pressure is 382MPa.

[0050] Table 3 Columnar grain structure Cu 71 Al 20 mn 9 Performance parameters of alloy plates parallel and perpendicular to solidification direct...

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Abstract

The invention provides a Cu-Al-Mn shape memory alloy damping and energy-absorbing device for civil construction and a manufacturing method thereof. The damping and energy-absorbing device comprises a connecting assembly, a damping and energy-absorbing assembly and an auxiliary assembly. The damping and energy-absorbing assembly is made of strongly anisotropic columnar crystal microstructure Cu-Al-Mn shape memory alloy plates. The auxiliary assembly is steel plates. The shape memory alloy plates and the steel plates are stacked alternately with the solidification direction of columnar crystals being parallel to the horizontal direction, so that the damping and energy-absorbing device is manufactured. The damping and energy-absorbing device is installed in a base of a building. The shape memory alloy plates are manufactured in a directional solidification method. The damping and energy-absorbing device has the advantages that the functional anisotropy is achieved; it means that over 10% of high recoverable strain can be provided in the horizontal direction, the building is allowed to swing horizontally at a great amplitude relative to a foundation under the conditions of an earthquake and the like, and therefore the horizontal shake energy is absorbed; over 7% of high recoverable strain is provided in the vertical direction, the functions of absorbing energy and reducing shock in the vertical direction are achieved, and the damping and energy-absorbing device has a higher bearing capacity.

Description

Technical field: [0001] The invention belongs to the field of metal material preparation and application, and relates to the design and application of a shape memory alloy shock absorber, in particular to a Cu-Al-Mn shape memory alloy shock absorber for civil engineering and its manufacturing method . Background technique: [0002] In recent years, natural disasters such as strong earthquakes and hurricanes have occurred frequently, which have brought serious disasters to human life and property. The damage caused, collapse or collapse etc. are the main sources of disaster. And the higher the height of the building, the greater the strain caused by horizontal swaying and shaking. Therefore, in modern civil architecture, reducing the destructive response of building structures under external loads and improving the disaster resistance of building structures is one of the important issues that need to be solved urgently. At present, in the design of buildings, shock absorpt...

Claims

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Application Information

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IPC IPC(8): E04B1/98C22C1/02C22C9/01
Inventor 黄海友刘记立谢建新
Owner UNIV OF SCI & TECH BEIJING
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