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Correction published on 12 October 2017, see Micromachines 2017, 8(10), 303.

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Micromachines 2017, 8(9), 286;

Research on Design and Simulation of Biaxial Tensile-Bending Complex Mechanical Performance Test Apparatus

School of Mechanical Science & Engineering, Jilin University, Changchun 130025, China
School of Mechanical Science & Engineering, Beihua University, Jilin 132021, China
Author to whom correspondence should be addressed.
Received: 20 June 2017 / Revised: 13 September 2017 / Accepted: 18 September 2017 / Published: 20 September 2017
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In order to realize a micro-mechanic performance test of biaxial tensile-bending-combined loading and solve the problem of incompatibility of test apparatus and observation apparatus, novel biaxial-combined tensile-bending micro-mechanical performance test apparatus was designed. The working principle and major functions of key constituent parts of test apparatus, including the servo drive unit, clamping unit and test system, were introduced. Based on the finite element method, biaxial tensile and tension-bending-combined mechanical performances of the test-piece were studied as guidance to learn the distribution of elastic deformation and plastic deformation of all sites of the test-piece and to better plan test regions. Finally, this test apparatus was used to conduct a biaxial tensile test under different pre-bending loading and a tensile test at different rates; the image of the fracture of the test-piece was acquired by a scanning electron microscope and analyzed. It was indicated that as the pre-bending force rises, the elastic deformation phase would gradually shorten and the slope of the elastic deformation phase curve would slightly rise so that a yield limit would appear ahead of time. Bending speed could exert a positive and beneficial influence on tensile strength but weaken fracture elongation. If bending speed is appropriately raised, more ideal anti-tensile strength could be obtained, but fracture elongation would decline. View Full-Text
Keywords: biaxial tensile; bending; combined loading; micro-mechanical properties biaxial tensile; bending; combined loading; micro-mechanical properties

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Li, H.; Zhao, H.; Luo, C.; Li, L.; Zhang, H. Research on Design and Simulation of Biaxial Tensile-Bending Complex Mechanical Performance Test Apparatus. Micromachines 2017, 8, 286.

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