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Dot matrix material bolt hole pulling-out force testing device and method

A testing device and bolt hole technology, applied in the field of lattice material bolt hole pullout force testing device, can solve the problems of lattice structure with large void ratio, low stiffness and strength, fracture and the like

Active Publication Date: 2021-09-07
BEIJING INST OF RADIO MEASUREMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during use, due to the large void ratio of the lattice structure, the stiffness and strength are often much lower than the raw materials, so various failure phenomena such as material crushing and fracture often occur under unreasonable use.

Method used

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  • Dot matrix material bolt hole pulling-out force testing device and method
  • Dot matrix material bolt hole pulling-out force testing device and method
  • Dot matrix material bolt hole pulling-out force testing device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as Figure 1 to Figure 6 As shown, a device for testing the pull-out force of a lattice material bolt hole in this embodiment includes a first connector, a second connector and a splint assembly 1, and an assembly for assembling the lattice material 5 is formed in the splint assembly 1. Space 14, the first connector is connected with the splint assembly 1, the second connector is formed with a first through hole 32 for one end of the connecting bolt 4 to pass through, and the splint assembly 1 is also provided with a The second through hole 15 through which the connecting bolt 4 passes.

[0041] Such as Figure 1 to Figure 6 As shown, a specific solution of this embodiment is that the splint assembly 1 includes a pressing plate 11 and a platen 12, the pressing plate 11 is arranged on the platen 12 and arranged at a distance from the platen 12, and the pressing plate The assembly space 14 is formed between the platen 11 and the platen 12; the platen 12 is provided...

Embodiment 2

[0056] A method for testing the pull-out force of a lattice material bolt hole in this embodiment is tested by using the test device of the embodiment, including the following steps:

[0057] S1, the lattice material 5 with bolt holes is clamped in the assembly space 14 of the splint assembly 1;

[0058] S2, passing one end of the connecting bolt 4 sequentially through the first through hole 32 on the second connector and the second through hole 15 on the splint assembly 1 and threadedly connected with the bolt hole on the lattice material 5 , and the connecting bolt 4 should penetrate at least one hole diameter of the bolt hole of the lattice material 5, so as to prevent the connecting bolt 4 from slipping out during the test, and at the same time, the connecting bolt 4 is not in contact with the platen and the inner wall of the first through hole on the pull ring. contact to avoid affecting the test accuracy; then adjust the lattice material so that the measured bolt holes o...

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Abstract

The invention relates to a dot matrix material bolt hole pulling-out force testing device and method.The testing device comprises a first connecting piece, a second connecting piece and a clamping plate assembly, an assembling space used for assembling a dot matrix material is formed in the clamping plate assembly, and the first connecting piece is connected with the clamping plate assembly; a first through hole for one end of the connecting bolt to penetrate through is formed in the second connecting piece, and a second through hole for a connecting bolt to penetrate through is further formed in the clamping plate assembly. A dot matrix material can be installed in the assembly space, and then the connecting bolt penetrates through the first through hole in the second connecting piece and the second through hole in the clamping plate assembly, so that the connecting bolt can be in threaded connection with a bolt hole in the dot matrix material, then load acting force is applied to the first connecting piece and the second connecting piece, the drawing force bearing capacity of the dot matrix material bolt holes is quantitatively evaluated, the maximum drawing force capable of being borne by the specific dot matrix material bolt holes can be determined, then the structural reliability is evaluated, and the structural safety is guaranteed.

Description

technical field [0001] The invention relates to the field of tests related to lattice materials, in particular to a device and method for testing the bolt hole pull-out force of lattice materials. Background technique [0002] With the rapid rise of additive manufacturing, the application of lattice materials in various fields such as aerospace and automobiles is gradually increasing due to their characteristics such as stiffness can be designed. However, during use, due to the large void ratio of the lattice structure, the stiffness and strength are often much lower than the raw materials, so various failure phenomena such as material crushing and fracture often occur under unreasonable use. For lattice material panels, the bolt holes that are fixed to other structures are the main parts of the structure that are stressed, and are also the parts that are most likely to fail. Therefore, it is of great significance to accurately measure and evaluate the pulling force that th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01M13/00
CPCG01N3/08G01M13/00G01N2203/0012G01N2203/0017G01N2203/0032G01N2203/0075G01N2203/027
Inventor 陈天雄翁俊李春志王润楠张博
Owner BEIJING INST OF RADIO MEASUREMENT