Experimental Observation on the Pure Torsional Ratchetting of Polycarbonate Polymer at Room Temperature
The stress-controlled pure torsional cyclic tests are carried out to investigate the torsional ratchetting of polycarbonate (PC) polymer at room temperature. The effects of applied shear mean stress, stress amplitude, stress rate, peak stress hold, and stress history on the torsional ratchetting are...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/7181069 |
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| author | Fucong Lu Bencheng Zhang Bo Wu Zhiwen Wu Xiao Suo |
| author_facet | Fucong Lu Bencheng Zhang Bo Wu Zhiwen Wu Xiao Suo |
| author_sort | Fucong Lu |
| collection | DOAJ |
| description | The stress-controlled pure torsional cyclic tests are carried out to investigate the torsional ratchetting of polycarbonate (PC) polymer at room temperature. The effects of applied shear mean stress, stress amplitude, stress rate, peak stress hold, and stress history on the torsional ratchetting are discussed. The shear strain of tubular specimen is measured by a noncontact digital image correlation (DIC) apparatus. The results show that the torsional ratchetting of the polymer obviously depends on the applied shear stress level, stress rate, and peak stress hold; the shear ratchetting strain and its rate increase with the increasing mean stress, stress amplitude, and peak stress hold time and with the decreasing stress rate. Moreover, the torsional ratchetting depends on the stress history. A higher stress level cyclic loading history restrains the evolution of torsional ratchetting in the subsequent lower stress level cyclic loading, while the lower stress level cyclic loading history promotes the torsional ratchetting of the subsequent higher level cyclic loading. |
| format | Article |
| id | doaj-art-b57256d504c14bd4a5fa03938bc18452 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-b57256d504c14bd4a5fa03938bc184522025-02-03T01:04:37ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/71810697181069Experimental Observation on the Pure Torsional Ratchetting of Polycarbonate Polymer at Room TemperatureFucong Lu0Bencheng Zhang1Bo Wu2Zhiwen Wu3Xiao Suo4College of Civil Engineering and Architecture, Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning 530004, ChinaCollege of Civil Engineering and Architecture, Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning 530004, ChinaCollege of Civil Engineering and Architecture, Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning 530004, ChinaCollege of Civil Engineering and Architecture, Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning 530004, ChinaCollege of Civil Engineering and Architecture, Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Guangxi University, Nanning 530004, ChinaThe stress-controlled pure torsional cyclic tests are carried out to investigate the torsional ratchetting of polycarbonate (PC) polymer at room temperature. The effects of applied shear mean stress, stress amplitude, stress rate, peak stress hold, and stress history on the torsional ratchetting are discussed. The shear strain of tubular specimen is measured by a noncontact digital image correlation (DIC) apparatus. The results show that the torsional ratchetting of the polymer obviously depends on the applied shear stress level, stress rate, and peak stress hold; the shear ratchetting strain and its rate increase with the increasing mean stress, stress amplitude, and peak stress hold time and with the decreasing stress rate. Moreover, the torsional ratchetting depends on the stress history. A higher stress level cyclic loading history restrains the evolution of torsional ratchetting in the subsequent lower stress level cyclic loading, while the lower stress level cyclic loading history promotes the torsional ratchetting of the subsequent higher level cyclic loading.http://dx.doi.org/10.1155/2020/7181069 |
| spellingShingle | Fucong Lu Bencheng Zhang Bo Wu Zhiwen Wu Xiao Suo Experimental Observation on the Pure Torsional Ratchetting of Polycarbonate Polymer at Room Temperature Advances in Materials Science and Engineering |
| title | Experimental Observation on the Pure Torsional Ratchetting of Polycarbonate Polymer at Room Temperature |
| title_full | Experimental Observation on the Pure Torsional Ratchetting of Polycarbonate Polymer at Room Temperature |
| title_fullStr | Experimental Observation on the Pure Torsional Ratchetting of Polycarbonate Polymer at Room Temperature |
| title_full_unstemmed | Experimental Observation on the Pure Torsional Ratchetting of Polycarbonate Polymer at Room Temperature |
| title_short | Experimental Observation on the Pure Torsional Ratchetting of Polycarbonate Polymer at Room Temperature |
| title_sort | experimental observation on the pure torsional ratchetting of polycarbonate polymer at room temperature |
| url | http://dx.doi.org/10.1155/2020/7181069 |
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