A fixture for off-axis compression test of composite laminates
A composite material layer and compression test technology, applied in the direction of analyzing materials, using stable tension/pressure testing material strength, instruments, etc., can solve the problems of unsatisfactory test results and low test efficiency
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Embodiment 1
[0026] An embodiment of the present invention provides a fixture for off-axis compression of a composite laminate, comprising an upper base body 4 and a lower base body 9, and the upper base body 4 and the lower base body 9 are slidably connected in the vertical direction through a sliding assembly;
[0027] The opposite end of the upper base body 4 and the lower base body 9 is provided with a clamping structure for clamping the end of the test piece 3, and each base is provided with a clamping structure for pressing the end of the test piece 3 along the longitudinal direction. The briquetting block 10 and a loading structure for applying load to the corresponding briquetting block 10; each seat body is located on the left and right sides of the test piece 3 and is respectively detachably connected with a side stopper 8 for restricting the left and right movement of the test piece 3.
[0028] Further, the clamping structure includes clamp jaws 6 opened on the base, the test pie...
Embodiment 2
[0036] This embodiment is based on Embodiment 1, the side of the gripping block 5 in contact with the clamped surface of the test piece 3 is a toothed surface, and the toothed surfaces of the clamping blocks 5 on both sides of the test piece 3 are parallel to each other so as to be parallel to the test piece 3 The two clamped surfaces are tightly fitted.
[0037] In this application, the clamping block 5 is a wedge-shaped structure, and the contact surface of the clamping block jaw 6 and the clamping block 5 is also a wedge-shaped slope, the wedge-shaped slope is inclined to the center, and the inner slope extends to the upper base 4 or extends to the inside of the lower base 9, Now take the lower base body 9 as an example, the clamp jaw 6 is located in the center of the lower base body 9 and is integrally formed with the lower base body 9; The distance between the tooth lines is equal, and each tooth line is parallel to each other. The lower end of the test piece 3 is clamped...
Embodiment 3
[0039] This embodiment is based on Embodiment 1, the sliding assembly includes a longitudinal guide rod 7, the lower end of the guide rod 7 is fixed on the lower base body 9, the upper end of the guide rod 7 passes through the upper base body 4 and is slidably connected with it, the guide rod 7 The upper end of the rod 7 is also covered with a linear bearing 2, and the linear bearing 2 is fixed inside the upper body 4;
[0040] There are two sliding assemblies, and the two sliding assemblies are symmetrically distributed on the left and right sides of the clamp jaw 6 .
[0041] The guide rod in this application is a long cylindrical structure, and the upper base body 4 and the lower base body 9 are slidably connected by a sliding assembly. When in use, the clamps of the two clamping mechanisms can slide relative to each other, making it suitable for off-axis compression tests of different sizes. Components, and easy to use DIC, strain gauges and other measuring equipment.
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