Small-sized composite material constant-strain fatigue test device
A technology for composite materials and fatigue testing, which is applied in the direction of measuring devices, analyzing materials, and using stable tension/pressure to test the strength of materials, etc. It can solve the problems of unaligned specimens, large volumes, and different sizes of specimens. Achieve the effect of simple and reasonable structure, small volume, and reduce test error
Active Publication Date: 2019-11-15
NANJING UNIV OF SCI & TECH
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Problems solved by technology
The main problems in the above research are: the volume of the traditional dynamic fatigue testing machine is too large, which makes it impossible to superimpose the damp heat aging condition when the material is subjected to the constant strain fatigue test
At the same time, due to certain errors in the preparation process of traditional dumbbell-shaped test pieces, the size of the test pieces will vary. The most typical is the length of the test pieces. Unable to align, which will affect the accuracy of the experimental results to a certain extent
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[0017] The implementation of the present invention will be described in detail below in conjunction with specific embodiments.
[0018] Such as Figure 1-2 As shown, a small composite material constant strain fatigue test device includes an external circulation platform and at least one internal specimen fixture, and the external circulation platform includes a base 8, a drive motor 9, a gear shaft 10, two cams 11, two Follower 12, two rigid bushings 13, fixed table 15, described gear shaft 10 is set through described base 8, and the middle part of described gear shaft 10 is provided with first gear 16, and described gear shaft 10 passes through The two ends of the base 8 are respectively fixedly connected with a cam 11, the drive motor 9 is fixedly supported on the base 8, the output shaft of the drive motor 9 is connected to the second gear 17, and the second gear 17 is connected to the first gear 17. The gear 16 is meshed, and the driving motor 9 used is a stepping motor o...
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The invention discloses a small-sized composite material constant-strain fatigue test device, wherein the device is composed of at least one internal test piece clamp and an external circulation platform; the external circulation platform comprises a base, a driving motor, a gear shaft, two cams, two driven parts, two rigid shaft sleeves and a fixed table; and each internal test piece clamp comprises an upper end pre-tightening nut, a clamp upper cover, two sets of clamping devices, a clamp lower cover and two side end pre-tightening nuts. Test pieces of different widths can be clamped by front and back clamping arms through the test piece clamp, and test pieces of different lengths can be clamped by the clamp upper cover and the clamp lower cover. According to the device, a dumbbell-shaped test piece can be subjected to profiling clamping, namely the length and width of the clamp can be changed, so that the requirement for centering of the test piece is guaranteed, and the device canbe placed in an aging temperature box to carry out multi-factor superposition dynamic fatigue test on the test piece. The device can be applied to the aging-resistant dynamic constant strain fatigue test of composite materials, high polymer materials and various non-metal materials, and is relatively wide in application range.
Description
technical field [0001] The invention belongs to the technical field of fatigue damage test, and in particular relates to a small-sized composite material constant strain fatigue test device. Background technique [0002] At present, the single-factor aging research on viscoelastic composites (such as hydroxyl-terminated polybutadiene HTPB) is relatively mature, but the multi-factor superposition aging research on viscoelastic composites is not perfect, such as the aging of materials under humid heat aging. Study on damage characteristics of dynamic fatigue mechanics. The main problems in the above research are: the volume of the traditional dynamic fatigue testing machine is too large, which makes it impossible to superimpose the damp heat aging condition when the material is subjected to the constant strain fatigue test. At the same time, due to certain errors in the preparation process of traditional dumbbell-shaped test pieces, the size of the test pieces will vary. The ...
Claims
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IPC IPC(8): G01N3/08G01N3/04
CPCG01N3/08G01N3/04G01N2203/0017G01N2203/0073G01N2203/0222G01N2203/0236
Inventor 王庭钰陈雄许进升
Owner NANJING UNIV OF SCI & TECH