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使用数字图像相关性对玻璃纤维和环氧树脂复合材料的弹性性质评估

Dalferson Yoras¹, Sylwia Makowska², Agnė Kairytė³

¹Group on Mechanics of Materials and Structures, Campus Cachoeira do Sul, Federal University of Santa Maria, Cachoeira do Sul 96503-205, Brazil.

Materials (Basel, Switzerland)

|August 10, 2024

概括

数字图像相关性 (DIC) 在测量复合材料变形方面存在局限性,与模拟延伸计相比有差异. 需要进一步的研究来完善DIC,以便准确地分析复合材料的机械性质.

科学领域:

材料科学材料科学材料科学
机械工程机械工程
复合材料复合材料复合材料

背景情况:

数字图像相关性 (DIC) 是一种非接触式光学方法,用于测量变形.
传统的模拟延伸仪广泛用于机械测试.
复合材料提供高强度与重量比,但需要精确的表征.

研究的目的:

评估简化数字图像关联 (DIC) 设备的灵敏度和局限性.
将DIC测量与玻璃纤维/环氧复合材料的模拟扩展仪数据进行比较.
验证实验结果与古典板理论 (CLT) 相对应.

主要方法:

通过手工分层加工制造的复合板 ([0]3,[90]4,[±45]3).
根据ASTM D3039和D3518标准进行了拉力测试.
采用DIC来捕获应变场,并与模拟延伸仪读数进行比较.

主要成果:

DIC显示了差异:纵向模量 (E1) 的11.1%,横向模量 (E2) 的5.6%.
由于设备的局限性,DIC在低变形下表现出较低的效率.
对于 [±45]3 层材质,CLT 预测了 7136 MPa 的纵向模量 (Ex),而在实验中则为 5208 MPa (差异为 31.2%).

结论:

简化DIC设备的局限性影响了复合材料机械测试的准确性.
模拟延伸计仍然可靠,但DIC为非接触式分析提供了潜力.
实验数据和CLT之间的差异凸显了改进复合建模和DIC技术的需要.

关键词:

复合材料是一种复合材料.环氧树脂是一种环氧树脂.玻璃纤维是一种玻璃纤维.手动层制作手工层制作机械性能机械性能机械性能应变测量应变测量

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