西安建筑科技大学学报(自然科学版)

纤维增强复合材料由于其耐腐蚀性好、质量轻和比强度高等优点被广泛应用于海洋工程.研究真空灌注制作的乙烯基酯玻璃纤维复合材料在南海环境下,在室温和60 ℃高温的海水中浸泡不同时间的试样进行玻璃转化温度和拉伸强度测试.试验结果表明:材料的玻璃转化温度随着浸泡的时间增加而下降.其拉伸强度变化分为三个阶段:第一个阶段随时间增加而上升; 第二阶段缓慢降低; 第三个阶段以较快的速率降低.并给出了拉伸强度随浸泡时间变化三个阶段的指数拟合函数.从试验结果来看:乙烯基酯玻璃纤维复合材料具有很好的耐久性.

Fiber-reinforced polymer(FRP)composites are increasingly used in marine engineering due to their excellent corrosion resistance, light weight and high specific strength. This paper reports an investigation on the behavior of vacuum infused glass fiber-reinforced vinyl ester(GFRP)composites. The specimens were immersed in simulated South China Sea water at room temperature and 60 ℃ for different durations and their tensile strength and glass transition temperature(Tg)were tested. Results indicate that the Tg of the specimens decreases as the immersion time increases. The change of tensile strength exhibits three stages: The tensile strength increases to a maximum value in the first stage, then reduces slowly in the second stage, and reduces more rapidly in the third stage. Data regression analyses were conducted and an exponential model is presented. The test results indicate that the GFRP exhibits good durability.

引言
1 拉伸试样制作
2 海水浸泡与试验
3 试验结果与分析
4 结论

表1 树脂的性能
Tab.1 Properties of resins

图1 拉伸试样几何形状<br/>Fig.1 Geometry of tensile specimen

图1 拉伸试样几何形状
Fig.1 Geometry of tensile specimen

图2 GFRP拉伸试样<br/>Fig.2 GFRP tensile specimens

图2 GFRP拉伸试样
Fig.2 GFRP tensile specimens

图3 DSC测量数据
Fig.3 DSC test data

图4 室温海水浸泡后的试样(430复材)<br/>Fig.4 Specimens after seawater immersion at room temperature(430 FRP)

图4 室温海水浸泡后的试样(430复材)
Fig.4 Specimens after seawater immersion at room temperature(430 FRP)

图5 高温海水浸泡后的试样(430复材)<br/>Fig.5 Specimens after seawater immersion at 60 ℃(430 FRP)

图5 高温海水浸泡后的试样(430复材)
Fig.5 Specimens after seawater immersion at 60 ℃(430 FRP)

图6 浸泡时间对Tg的影响(430复材)<br/>Fig.6 Effect of immersion time on Tg(430 Matrix)

图6 浸泡时间对Tg的影响(430复材)
Fig.6 Effect of immersion time on Tg(430 Matrix)

表2 室温下海水浸泡试样拉伸强度(1967复材)<br/>Tab.2 Tensile strength of specimens after seawater immersion at room temperature(1967 Matrix)

表2 室温下海水浸泡试样拉伸强度(1967复材)
Tab.2 Tensile strength of specimens after seawater immersion at room temperature(1967 Matrix)

表3 室温下海水浸泡试样拉伸强度(430复材)<br/>Tab.3 Tensile strength of specimens after seawater immersion at room temperature(430 Matrix)

表3 室温下海水浸泡试样拉伸强度(430复材)
Tab.3 Tensile strength of specimens after seawater immersion at room temperature(430 Matrix)

图7 室温下试样拉伸强度<br/>Fig.7 Tensile strength at room temperature

图7 室温下试样拉伸强度
Fig.7 Tensile strength at room temperature

表4 60 ℃海水浸泡下试样拉伸强度(1967复材)<br/>Tab.4 Tensile strength of specimens after seawater immersion at 60 ℃(1967 Matrix)

表4 60 ℃海水浸泡下试样拉伸强度(1967复材)
Tab.4 Tensile strength of specimens after seawater immersion at 60 ℃(1967 Matrix)

表5 60 ℃海水浸泡下试样拉伸强度(430复材)<br/>Tab.5 Tensile strength of specimens after immersed at 60 ℃(430 FRP)

表5 60 ℃海水浸泡下试样拉伸强度(430复材)
Tab.5 Tensile strength of specimens after immersed at 60 ℃(430 FRP)

图8 60 ℃ 高温下试样拉伸强度<br/>Fig.8 Tensile strength of specimens after seawater immersion at 60 ℃

图8 60 ℃ 高温下试样拉伸强度
Fig.8 Tensile strength of specimens after seawater immersion at 60 ℃

表6 公式(1)的拟合参数<br/>Tab.6 Fitted coefficients

表6 公式(1)的拟合参数
Tab.6 Fitted coefficients

图9 试验数据拟合曲线(1967复材)<br/>Fig.9 Fitted curve of test data(Matrix 1967)

图9 试验数据拟合曲线(1967复材)
Fig.9 Fitted curve of test data(Matrix 1967)

图10 试验数据拟合曲线(430复材)<br/>Fig.10 Fitted curve of test data(Matrix 430)

图10 试验数据拟合曲线(430复材)
Fig.10 Fitted curve of test data(Matrix 430)

图11 拉伸强度预测曲线<br/>Fig.11 Model predictions of tensile strength

图11 拉伸强度预测曲线
Fig.11 Model predictions of tensile strength

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备注

引言

1 拉伸试样制作

2 海水浸泡与试验

3 试验结果与分析

4 结论

期刊信息