A test and evaluation device for buckling and wrinkling of metal sheet with adjustable normal constraint
A technology of thin metal plates and evaluation devices, which is applied in the direction of applying stable tension/pressure to test the strength of materials, and can solve problems such as the difficulty of instability of metal thin-walled parts
Active Publication Date: 2018-03-23
NORTHWESTERN POLYTECHNICAL UNIV
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[0006] In order to overcome the problem that the instability of metal thin-walled parts is difficult to control under the complex constraints of multiple molds, and to establish a test and analysis method that is more in line with the actual complex boundary constraints, this invention proposes a thin plate anti-wrinkling test with adjustable normal constraints and evaluation device
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[0050] This embodiment is a thin plate anti-wrinkling test and evaluation device under adjustable normal constraints, such as figure 1 shown. The device includes: reference plate 9, fixed plate 7, front gap plate 5, rear gap plate 10, thin plate sample pressure roller 6, guide positioning sleeve 3, clamping bracket 2, connecting plate 1, clamping rod 12, guide rod 11. Manually tighten the bolt 14, manually tighten the bolt 13, and measure the block 8. The reference plate 9 and the fixed plate 7 are connected and fixed by four clamping rods 12; the front gap plate 5 and the rear gap plate 10 are connected with the reference plate 9 and the fixed plate 7 by four guide rods 11; the sample 4 is located in the front gap Between the plate 5 and the rear gap plate 10, the clamping bracket 2, the thin plate sample pressure roller 6 and the guide positioning sleeve 3 cooperate with each other to fix the clamping end 15 of the sample 4; two connecting plates 4 are used to fix the clamp...
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A metal sheet instability and wrinkle test and evaluation device with adjustable normal constraints, including: a reference plate, a fixed plate, a front and a rear gap plate, a thin plate sample pressure roller, a guide positioning sleeve, a clamping bracket, a connecting plate, Clamping rods, guide rods, manual jacking bolts, manual tensioning bolts, measuring blocks. The reference plate and the fixed plate are connected and fixed by the clamping rod; the front and rear gap plates are connected with the reference plate and the fixed plate through the guide rod; Cooperate with the guide positioning sleeve to fix the clamping end of the sample; the connecting plate is used to fix the clamping bracket; the manual tightening bolt and the manual tensioning bolt are installed on the reference plate and the fixed plate; the measuring block is fixed on the reference plate and the front gap On the board, it is used to install the digital dial indicator. The invention realizes the wrinkling prediction of the test piece under the constraint of the adjustable normal direction, and provides an experimental basis for studying the destabilizing wrinkling mechanism and rule of the lightweight thin-walled piece under complex boundary conditions.
Description
technical field [0001] The invention relates to the technical field of plastic processing of thin plates, in particular to a test and evaluation device for testing instability and wrinkling of thin metal plates under complex boundary conditions. Background technique [0002] At present, in the manufacturing fields of aviation, aerospace, navigation and automobiles, the application of thin-walled lightweight parts is becoming more and more extensive. The rigidity of the structure depends not only on the elastic modulus of the constituent materials, but also on its geometry, boundary conditions and loading forms. Parts of this type of thin-walled structure are due to their very small diameter-thickness ratio (thin-walled tube D / t>20), aspect ratio (sheet L / t>50), so its bending stiffness is very small. Moreover, thin-walled lightweight parts generally need to experience complex multi-die constraints (complex boundary conditions) during the processing and forming proces...
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IPC IPC(8): G01N3/08
Inventor 李恒韩瑞杨合刘楠李龙杨恒
Owner NORTHWESTERN POLYTECHNICAL UNIV