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In view of the influence of the analysis method of geosynthetics axial tensile test results on the authenticity of mechanical properties, the mechanical properties of PVC geomembrane and HDPE geomembrane materials were studied respectively, and the relationship curves of the two materials under different analysis methods were obtained. Then the error of material tensile index under the two analysis methods was compared. The results indicate that the experimental curves obtained by the true stress-strain analysis method considering thickness changes can more accurately reflect the tensile deformation process of materials. When the materials are different, the modulus errors of the materials under the two analysis methods are also completely different. However, the variation law of the true stress-strain curve is more consistent compared to standard methods for processing, which can more accurately evaluate the material's ability to adapt to load deformation.

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针对土工合成材料轴向拉伸试验结果分析方法对力学特性真实性的影响,分别开展聚氯乙烯(PVC)土工膜和高密度聚乙烯(HDPE)土工膜材料的力学特性研究,获取两种材料在两种不同分析方法下的关系曲线,并对比两种分析方法下材料抗拉指标的误差。结果表明,考虑厚度变化的真应力应变分析方法所得试验曲线能更真实地反映材料拉伸变形过程;在材料不同时,两种分析方法下材料模量误差也截然不同,但真应力应变曲线变化规律相较于规范方法更具一致性,能更真实地评价材料适应荷载变形的能力。

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宋永嘉(1968-),女,教授,研究方向为水工结构,E-mail:

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宋永嘉(1968-),女,教授,研究方向为水工结构,E-mail:

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宋永嘉(1968-),女,教授,研究方向为水工结构,E-mail:

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土工膜单向拉伸力学评价方法试验研究
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宋永嘉 , 唐源 , 张宪雷 , 田林钢
水电能源科学 | 水利水电工程 2023,41(12): 152-155
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水电能源科学 | 水利水电工程 2023, 41(12): 152-155
土工膜单向拉伸力学评价方法试验研究
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宋永嘉 , 唐源, 张宪雷, 田林钢
作者信息
  • 华北水利水电大学水利学院,河南 郑州 450046
  • 宋永嘉(1968-),女,教授,研究方向为水工结构,E-mail:

Experimental Study of Unidirectional Tensile Mechanical Evaluation Method for Geomembranes
Yong-jia SONG , Yuan TANG, Xian-lei ZHANG, Lin-gang TIAN
Affiliations
  • School of Water Conservancy, North China University of Water Resources and Electric Power, Henan 450046, China
出版时间: 2023-12-25 doi: 10.20040/j.cnki.1000-7709.2023.20230970
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针对土工合成材料轴向拉伸试验结果分析方法对力学特性真实性的影响,分别开展聚氯乙烯(PVC)土工膜和高密度聚乙烯(HDPE)土工膜材料的力学特性研究,获取两种材料在两种不同分析方法下的关系曲线,并对比两种分析方法下材料抗拉指标的误差。结果表明,考虑厚度变化的真应力应变分析方法所得试验曲线能更真实地反映材料拉伸变形过程;在材料不同时,两种分析方法下材料模量误差也截然不同,但真应力应变曲线变化规律相较于规范方法更具一致性,能更真实地评价材料适应荷载变形的能力。

土工膜  /  轴向拉伸试验  /  力学特性  /  应力-应变关系

In view of the influence of the analysis method of geosynthetics axial tensile test results on the authenticity of mechanical properties, the mechanical properties of PVC geomembrane and HDPE geomembrane materials were studied respectively, and the relationship curves of the two materials under different analysis methods were obtained. Then the error of material tensile index under the two analysis methods was compared. The results indicate that the experimental curves obtained by the true stress-strain analysis method considering thickness changes can more accurately reflect the tensile deformation process of materials. When the materials are different, the modulus errors of the materials under the two analysis methods are also completely different. However, the variation law of the true stress-strain curve is more consistent compared to standard methods for processing, which can more accurately evaluate the material's ability to adapt to load deformation.

geomembrane  /  axial tensile test  /  mechanical property  /  stress-strain relationship
宋永嘉, 唐源, 张宪雷, 田林钢. 土工膜单向拉伸力学评价方法试验研究. 水电能源科学, 2023 , 41 (12) : 152 -155 . DOI: 10.20040/j.cnki.1000-7709.2023.20230970
Yong-jia SONG, Yuan TANG, Xian-lei ZHANG, Lin-gang TIAN. Experimental Study of Unidirectional Tensile Mechanical Evaluation Method for Geomembranes[J]. Water Resources and Power, 2023 , 41 (12) : 152 -155 . DOI: 10.20040/j.cnki.1000-7709.2023.20230970
2023年第41卷第12期
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doi: 10.20040/j.cnki.1000-7709.2023.20230970
  • 接收时间:2023-06-15
  • 首发时间:2026-01-28
  • 出版时间:2023-12-25
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  • 收稿日期:2023-06-15
  • 修回日期:2023-07-23
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    华北水利水电大学水利学院,河南 郑州 450046
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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