热氧老化作用下叠层轮胎隔震垫力学性能时变规律

doi:10.11896/cldb.19060137

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Abstract In order to study the mechanical properties of scrap tire rubber pads (STP) under different aging time, a 6-layer STP of 180 mm×180 mm was selected as the test object. The accelerated aging tests of STP specimens were carried out for 113 h, 223 h, 336 h, and 449 h, respectively, at a constant temperature of 100 ℃. The mechanical properties of STP after aging were tested and studied, such as compression properties, shear properties, shear strain correlation and so on. The changes of compressive elastic modulus, vertical stiffness, post-yield stiffness, yield force, and horizontal equivalent stiffness of STP with aging time were analyzed. This paper proposed a test method of compressive elastic modulus which was suitable for STP and could shorten the test time. Based on the results of the improved test method, the compressive elastic modulus of STP before and after aging test was compared and verified by vertical stiffness calculation theory. The test results showed that the improved compressive elastic modulus test method suitable for STP saved time and the result was accurate. When the STP was aged for 223 h (50 a at room temperature), the compressive elastic modulus and vertical stiffness were the highest, after 223 h, it showed a slight downward trend, and then it was basically flat. At the same time, the Arrhenius equation was used to fit the time-varying regularity formula of the STP compression perfor-mance index under different aging time. When the shear strain was in the range of 25%—100%, the horizontal equivalent stiffness and the post-yield stiffness of STP decrease with the increase of shear strain under different aging time. Its yield force increases as the shear strain increases.

Key words： scrap tire rubber pads (STP) mechanical properties aging time-varying regular

Published: 24 July 2020

CLC number:

TU352.12

Fund:This work was financially supported by the National Natural Science Foundation of China(51568064);Autonomous Region Education Department Natural Science Key Project (XJEDU2020I005).

About author:: Guangtai Zhang, male, professor of Xinjiang University, Ph.D. tutor, national registered supervision engineer. He is currently the deputy general manager and office director of the new campus construction headquarters of Xinjiang University, the party secretary of the Xinjiang University’s Architectural Engineering School, and the academic leader of the discipline “structural project” in the Xinjiang Uygur Autonomous Region. The key member of the National University specialty and autonomous Region excellent teaching team. Eighth session of the Director of the Xinjiang Civil Engineering Society, Xinjiang Housing and Construction Department of high-strength steel and high-strength concrete application expert group members, Urumqi high-performance concrete committee members, the autonomous region science and technology progress award assessment experts, the autonomous region scientific and technological review expert 2, invention patent 1, practical patent 2, published more than 50 core journal papers, organized or participated in the design of more than 10. Has won the autonomous region science and technology progress award 1, won the autonomous region natural science outstanding thesis award 3. Editor-in-chief of the national planning teaching materials 1; now presided over the Xinjiang Uygur Autonomous Region fine course 1, had obtained the autonomous region higher educationachievement first prize 1, Xinjiang University higher education achievement grand prize, Xinjiang University “outstanding master tutor”, has instructed 40 more graduate students successively. The research work mainly includes the new building material and the earthquake isolation and so on.

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	ZHANG Guangtai
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Cite this article:

ZHANG Guangtai,ZHANG Jinpeng,LU Dongliang, et al. Time-varying Law of Mechanical Properties of Scrap Tire Rubber Pads Under Thermal Aging[J]. Materials Reports, 2020, 34(16): 16182-16188.

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http://www.mater-rep.com/EN/10.11896/cldb.19060137 OR http://www.mater-rep.com/EN/Y2020/V34/I16/16182

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