| 模压成型的杨木纤维/高密度聚乙烯复合材料蠕变性能和蠕变模型 |
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| 引用本文： | 曹岩,徐海龙,王伟宏,王清文. 模压成型的杨木纤维/高密度聚乙烯复合材料蠕变性能和蠕变模型[J]. 复合材料学报, 2016, 33(6): 1174-1178. DOI: 10.13801/j.cnki.fhclxb.20160107.004 |
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| 作者姓名： | 曹岩 徐海龙 王伟宏 王清文 |
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| 作者单位： | 1.东北林业大学 生物质材料科学与技术教育部重点实验室, 哈尔滨 150040; |
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| 基金项目： | 国家自然科学基金(31460171)，贵州省科学技术基金(黔科合J 字[2015]2075号) |
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| 摘 要： | 采用长为850~2 000 μm的杨木纤维(PWF)增强高密度聚乙烯(HDPE), 利用模压成型法制备了PWF/HDPE复合材料, 对其进行了弯曲力学性能测试、无缺口简支梁冲击强度测试、24 h弯曲蠕变-24 h回复性能测试、1 000 h蠕变性能测试及蠕变后残余弯曲力学性能测试, 并利用两参数指数模型、Findley指数模型及四元件Burgers模型拟合蠕变曲线。结果表明: PWF/HDPE复合材料的弯曲强度为21.14 MPa, 弹性模量为2.31 GPa, 无缺口冲击强度为6.77 kJ/m2;24 h形变为0.803 mm, 24 h回复率为78.46%, 蠕变后弯曲强度下降了6.45%, 而弹性模量增加了8.95%;1 000 h形变为0.809 mm, 蠕变后弯曲强度保留了72.35%, 弹性模量增加了10.67%;3种模型中, 四元件Burgers模型拟合PWF/HDPE复合材料蠕变性能的效果较好。
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| 关 键 词： | 复合材料 弯曲强度 弹性模量 蠕变-回复 蠕变模型 |
| 收稿时间： | 2015-11-04 |
Creep properties and creep model of poplar wood fiber/high-density polyethylene composites prepared by compression molding |
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| CAO Yan,XU Hailong,WANG Weihong,WANG Qingwen. Creep properties and creep model of poplar wood fiber/high-density polyethylene composites prepared by compression molding[J]. Acta Materiae Compositae Sinica, 2016, 33(6): 1174-1178. DOI: 10.13801/j.cnki.fhclxb.20160107.004 |
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| Authors: | CAO Yan XU Hailong WANG Weihong WANG Qingwen |
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| Affiliation: | 1.Key Laboratory of Bio-based Material Science & Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, China;2.Special and Key Laboratory of Guizhou Provincial Higher Education for Green Energy-Saving Materials, Guizhou Minzu University, Guiyang 550025, China |
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| Abstract: | Poplar wood fibers (PWF)of 850-2 000μm reinforced high-density polyethylene (HDPE)composites were prepared by compression molding process.The flexural mechanical property test,un-notched beam impact strength test,24 h flexural creep-24 h recovery property test,1 000 h creep property test and residual flexural me-chanical performance test after creep of PWF/HDPE composites were studied.And two-parameter exponential mod-el,Findley’s exponential model and four-element Burgers model were used to fit creep curve.The results show that the flexural strength,elastic modulus and un-notched impact strength of PWF/HDPE composites are 21.14 MPa, 2.31 GPa and 6.77 kJ/m2 ,respectively.The 24 h deformation is 0.803 mm,and 24 h recovery rate is 78.46%. After creep,flexural strength decreases by 6.45%,but the elastic modulus increases by 8.95%.The 1 000 h de-formation is 0.809 mm,and the flexural strength of the creep is 72.35% of the original value,and the elastic modu-lus increases by 10.67%.Among the three models,four-element Burgers model successfully simulates with the creep properties of PWF/HDPE composites. |
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| Keywords: | composites flexural strength elastic modulus creep-recovery creep model |
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