| 摘要: |
| 试验研究了平织PVC膜材在0°，5°，15°，25°，35°，45°，55°，65°，75°，85°，90°这11个偏轴方向的拉伸性能，同时考虑了10，25，50，100，200，500mm/min 6种拉伸速度的影响；讨论了平织PVC膜材的破坏模式与应力状态之间的关系，得到了平织PVC膜材主要力学参数随偏轴角度和拉伸速度变化的规律.结果表明：随着偏轴角度的增加，平织PVC膜材的抗拉强度逐渐降低，而断裂延伸率逐渐增加；试验中主要有3种破坏模式：纤维整齐断裂、纤维拔出破坏和复合型破坏，这主要与材料的应力状态有关；随着拉伸速度的增加，膜材的抗拉强度会略微增加，而断裂延伸率却有略微下降，两者均与拉伸速度的对数呈较好的线性关系. |
| 关键词: 平织PVC(聚氯乙烯)膜材 破坏模式 力学性能 拉伸速度 偏轴角度 |
| DOI：103969/j.issn1007 9629201603033 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51308532，90815003）；中国博士后科学基金资助项目（2013M541756）；江苏省博士后科研基金资助计划项目（1301034B） |
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| Off axial Tensile Properties of PVC Coated Woven Fabrics under Different Tensile Rates |
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ZHANG Yingying1, HUANG Yuan1, XU Junhao1, ZHANG Qilin2
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1.Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University ofMining & Technology, Xuzhou 221116, China;2.College of Civil Engineering, Tongji University, Shanghai 200092, China
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| Abstract: |
| A series of uniaxial tensile tests were carried out to study the tensile performances of the specimens in eleven directions including 0°, 5°, 15°, 25°, 35°, 45°, 55°, 65°, 75°, 85° and 90°, and six tensile rates (10，25，50，100，200，500mm/min) were also considered. The relationship between stress states and failure modes was discussed, and the relationship between the main parameters and tensile rates & off axial angles were obtained. Results show that with off axial angle increasing, the tensile strength decreases while the strain at break increases. Three failure modes can be observed, including failure of even fracture, yarns pulled out and mixed failure, which are related to the stress states. With tensile rate increasing, the tensile strength increases slightly while the strain at break decreases. The tensile strength and strain at break show good linear relationship with tensile rates logarithm. |
| Key words: poly vinyl chloride (PVC) coated woven fabrics failure mode mechanical property tensile rate off axial angle |
