Test piece boundary constraint applying device in lateral impact resistance experiment
A technology of imposing devices and boundary constraints, applied in the direction of using a single impact force to test the strength of materials, measuring devices, instruments, etc., can solve problems such as single function, and achieve the effect of comprehensive functions, wide application range and convenient installation.
Pending Publication Date: 2019-05-21
HEFEI UNIV OF TECH
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Problems solved by technology
At present, the reported experiments on the lateral impact resistance of axially stressed members are mainly aimed at rigidly connected axially compressed members, and the boundary constraint applying device can only realize rigidly connected, and its function is relatively single
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Embodiment Construction
[0044] Below in conjunction with embodiment technical solution of the present invention is made more specific description:
[0045] The present invention includes an axial loading system and a support restraint system for installing a rod-shaped test piece 13. The end of the test piece 13 is connected with a coaxially arranged rigid spring 18, and the axial loading system passes through the rigid spring. 18 applies an axial load to the test piece 13 .
[0046] The support restraint system includes a pair of guide rails 1, a first support 4, and a second support 5, the first support 4 is fixed on the guide rail 1, and the second support 5 is slidably installed on the guide rail 1 Above, the first holder 4 is installed with a first chuck 7 for constraining one end of the test piece 13 , and the second holder 5 is installed with a second chuck 10 for restraining the other end of the test piece 13 .
[0047] The junction between the first clamp 7 and the first support 4 is provid...
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The invention relates to a test piece boundary constraint applying device in lateral impact resistance experiment. The device comprises a support restraint system for installing a rod-shaped test piece and an axial loading system for applying an axial load to the test piece. The support restraint system comprises a first mounting unit and a second mounting unit, a first circular through hole is formed in the first mounting unit, and a first rigid connection end welded to one end of the test piece or a first hinge end hinged to one end of the test piece is mounted in the first circular throughhole; a second circular through hole is formed in the second mounting unit; a second rigid connection end welded with the other end of the test piece or a second hinge end hinged with the other end ofthe test piece is mounted in the second circular through hole; and axial tension or pressure is applied and maintained to the test piece through the axial loading system. In a lateral impact resistance experiment, end constraint can be applied to rigid connection, in-plane hinge joint or out-of-plane hinge joint axial stress test pieces, and the function is more comprehensive.
Description
technical field [0001] The invention belongs to the field of structural lateral impact resistance experiments, and in particular relates to a device for applying boundary constraints on specimens in lateral impact resistance experiments. Background technique [0002] Rod structure is widely used in civil engineering, construction, machinery, shipbuilding, water conservancy and other projects. In the bar system structure, the specimens can be connected by rigid joints and hinged joints, and the stress of the specimens is mainly axial tension and compression. During its service period, the bar system structure may be subjected to impact loads such as explosions, vehicle and ship impacts, and heavy objects falling. At this time, the specimen is subjected to lateral impact loads while bearing axial loads, and its lateral impact resistance performance will directly affect the local or even overall performance of the bar system structure. Therefore, the experimental study of the...
Claims
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IPC IPC(8): G01N3/02G01N3/30
Inventor 胡波李元
Owner HEFEI UNIV OF TECH