ECC axial tension test deformation monitoring system and method
A technology for deformation monitoring and test pieces, which is applied in the direction of measuring devices, climate change adaptation, and the use of stable tension/pressure test material strength, etc., can solve the problems of only monitoring specified size test pieces, slippage of fixed brackets, fracture damage, etc.
A technology for deformation monitoring and test pieces, which is applied in the direction of measuring devices, climate change adaptation, and the use of stable tension/pressure test material strength, etc., can solve the problems of only monitoring specified size test pieces, slippage of fixed brackets, fracture damage, etc.
CN105547809AInactive Publication Date: 2016-05-04SHANDONG UNIV
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[0041] Below in conjunction with the accompanying drawings, the test method of the fixture and the displacement monitoring system for the direct tensile test of the ultra-high toughness cementitious composite (ECC) according to the present invention will be further described by implementing examples. The test equipment used in the direct tensile test is a computer-controlled electronic universal testing machine with a loading rate of 0.1mm / min.
[0042] Such as Figure 1(1) , 1(2) As shown, it is used for the tensile test fixture and displacement monitoring system of ultra-high toughness cementitious composite (ECC), mainly including two tensile fixtures, a set of templates for fixing the tensile fixture and a set of LVDT displacement Sensor fixing bracket, two rebound LVDT displacement sensors 3 and a collection box.
[0043] Wherein the stretching fixture comprises two clamping steel plates 15 and a stretching chuck 13 with a universal hinge. The steel plate and the chuck...
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The invention discloses an ECC axial tension test deformation monitoring system and method. The system mainly comprises a tension clamp, a template for fixing the tension clamp in the test-piece pasting process, a displacement sensor fixing support, a springback displacement sensor and a collecting box. The tension clamp comprises two steel plates and a chuck. The steel plates and the chuck are clamped by tooth grooves and anchored by two bolts, and therefore it is ensured that the test-piece is axially tensioned in the direct tension process. The template for fixing the tension clamp in the test-piece pasting process comprises two clamping plates and two baffles, the clamping plates and the baffles are connected through bolts, the width of the baffles is consistent to the width of the test-piece, and it is ensured that the test-piece does not deflect in the pasting process. The displacement sensor fixing support comprises two top beams and bottom beams. The beams are fixed to the test-piece through rapid-hardening glue and anchoring of bolts, and meanwhile, the two ends of the top beams and the two ends of the bottom beams are installed on sliding blocks in a screwed mode, wherein the sliding blocks move on the beams left and right. The fixing support is suitable for testing test-pieces of different sizes.
Description
technical field [0001] The invention relates to an ultra-high toughness cement-based composite material (Engineered Cementitious Composite, ECC) axial tension test and displacement deformation monitoring system and method. Background technique [0002] At present, for the use of ultra-high toughness cement-based composites, they will show obvious strain hardening characteristics under both bending load and direct tensile load. In order to verify the strain hardening characteristics of ECC materials, the direct tensile test is the best way to test the strain hardening properties of ECC materials. [0003] Today, the research on the mechanical properties of ECC composites mainly focuses on the flexural and four-point bending tests. Although there are also a lot of experimental studies on the tensile strength of ECC composite materials, such as direct tensile tests using dumbbell-shaped specimens, and direct tensile tests using rectangular thin plates, the fixing brackets of t...
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Patent Timeline
04 May 2016
Publication
CN105547809A
- IPC
- G01N3/02; G01N3/04; G01N3/08
- CPC
- G01N3/02; G01N3/04; G01N3/08; Y02A30/30
- Inventors
- 管延华; 钱远顺