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A large-scale composite structure static indentation damage prefabricated portable testing machine

A composite material and static indentation technology, which is applied in the direction of applying stable tension/pressure to test the strength of materials, can solve problems such as difficult bench-top testing machines, component deformation testing machine travel cannot be satisfied, and difficult to place bench-top testing machines, etc., to achieve The effect of large available stroke

Inactive Publication Date: 2017-12-29
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the research focuses on laboratory-level scientific research on composite laminate specimens using general-purpose desktop static testing machines. However, for large-scale structural components of composite materials involved in engineering practice, it is difficult to place them on the desktop due to size limitations. The test machine, or the deformation of the part itself is too large, which makes the test machine travel unsatisfactory, and it is difficult to use the desktop test machine to perform the static indentation test, so special portable equipment is required to complete it
In addition, for the uneven surface of the test piece, and the large test piece that cannot be disassembled and needs to be tested vertically or upside down, the existing technology often cannot complete the test.

Method used

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  • A large-scale composite structure static indentation damage prefabricated portable testing machine
  • A large-scale composite structure static indentation damage prefabricated portable testing machine
  • A large-scale composite structure static indentation damage prefabricated portable testing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a composite material structure static indentation damage prefabrication test machine includes a portable support assembly 1, an indenter 7, an indenter feed assembly 2 and a measurement and control assembly, and the indenter feed assembly 2 and the portable support assembly 1 connected, and connected with the indenter 7 in transmission, the measurement and control assembly is connected with the indenter feeding assembly 2, and the indenter can be positioned at multiple positions of the large test piece. The portable support assembly 1 includes a fixed column 4 , a movable column 6 and an upper beam 12 , and the fixed column 4 and the movable column 6 are connected to the upper beam 12 . The upper end of the movable column 6 is a bolt structure, named column bolt 3, the column bolt 3 passes through the upper beam 12, and the movable column 6 can be adjusted to extend out of the upper beam by adjusting the column bolt 3 12 in length.

[0034] ...

Embodiment 2

[0039] Compared with Example 1, the difference is that, as Figure 4 : the lower end of the column 20 is connected to a base 17, four foot bolts 18 are arranged on the base 17, and the length of the foot bolts 18 stretching out from the base 17 can be adjusted independently, so as to be suitable for uneven test pieces On the surface, the base 17 is provided with a hole corresponding to the position of the indenter 7, allowing the indenter 7 to pass through, and the displacement sensor 5 is arranged on the base 17 for measuring the surface of the test piece relative to the The displacement of the base 17.

Embodiment 3

[0041] Compared with Embodiment 1, the difference lies in that the lower end of the column is wound with an electrified electromagnetic coil (without accompanying drawings), and when the electromagnetic coil is electrified, the lower end of the column can be attracted and fixed on the magnetic material. on the test piece.

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Abstract

The invention discloses a large-scale composite material structure static indentation damage prefabrication portable testing machine, comprising a portable support assembly, an indenter, an indenter feed assembly and a measurement and control assembly, the indenter feed assembly is connected to the portable support assembly , and is connected with the indenter transmission, the measurement and control assembly is connected with the indenter feeding assembly, the indenter can be positioned at multiple positions of the large test piece, the portable support assembly includes a column and an upper beam, The column is connected with the upper beam, and the measurement and control assembly is composed of a load sensor and a displacement sensor, so as to realize load control loading and pit depth control loading. Compared with the prior art, the invention has the advantages of convenient movement, large stroke, simple and reliable overall structure, and is not affected by the uneven surface of the test piece, and is suitable for static indentation damage prefabrication of large composite material structures.

Description

technical field [0001] The invention relates to a large composite material structure static indentation damage prefabrication portable test technology, in particular to a large composite material structure static indentation damage prefabrication portable testing machine. Background technique [0002] Composite materials are widely used in aerospace structures. When these structures are subjected to low-speed impact loads, large-area delamination will occur inside the laminate. This delamination is not easy to identify from the surface and greatly reduces the load-bearing capacity of the structure. The safe application of the material poses a serious threat. In addition, the degree of damage caused by impact is not easy to quantify. Therefore, in aeronautical structural engineering, a large number of load-bearing performance tests of composite material structures with damage are required. The research results show (Experimental Research on Impact Resistance Behavior and Cha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/16
Inventor 梁嫄高尚君于哲峰
Owner SHANGHAI JIAOTONG UNIV
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