Modal analysis of E-glass basalt laminated composite plates based on experimental mechanical properties using FEA

ABSTRACT

The research work presents the comparative study on finite element modal analysis of 14 layers E-glass epoxy (G/E plate) and 10 layers basalt epoxy (B/E plate) composite angle-ply trapezoidal plate for various boundary conditions. The G/E and B/E plate having fiber orientations of [0°/+45°/0°/-45°/0°/+45°/0°]s and [0°/+45°/0°/-45°/0°]s are considered for fabricating plates using compression molding technique to minimize void content. Then, orthotropic properties are determined by experimental testing as per ASTM standards. The effects of different geometrical parameters including aspect ratio (a/b = 1 and 2), taper ratio (c/b = 0.25–1), and span-to-thickness ratio (a/h = 50) of trapezoidal plates on undamped modal analysis are done for G/E and B/E plates. A shell 281 element, which obeys first-order shear deformation theory, is applied in commercial finite element software to extract the natural frequencies and mode shapes for various boundary conditions using properties determined by experimental testing. The calculated mechanical properties are compared between G/E plate and B/E plate, and the results show basalt fiber as alternative material to E-glass fiber. The results of nondimensional frequency parameters and mode shapes of G/E and B/E plate also show good agreement with previous research work.

摘要

对14层E-玻璃环氧（G/E板）和10层玄武岩环氧（B/E板）复合角铺设梯形板在不同边界条件下的有限元模态分析进行了对比研究. 考虑将纤维取向为[0o/+45o/0o/-45o/0o/+45o/0o]s和[0o/+45o/0o/-45o/0o]s的G/E和B/E板用于使用压缩模塑技术制造板以最小化空隙率. 然后，根据ASTM标准，通过实验测试确定正交异性材料的性能. 研究了梯形板的长宽比（a/b=1&2）锥度比（c/b=0.25:1）和跨厚比（a/h=50）等几何参数对G/E板和b/E板无阻尼模态分析的影响. 在商用有限元软件中，采用一阶剪切变形理论的贝壳281单元，利用实验测试确定的特性，提取各种边界条件下的固有频率和振型. 对G/E板和B/E板的力学性能进行了比较，结果表明玄武岩纤维是E玻璃纤维的替代材料. 对G/E板和B/E板的无量纲频率参数和振型的计算结果也与前人的研究结果相吻合.

KEYWORDS:

• E-glass/epoxy composite
• basalt/epoxy composite
• trapezoidal plate
• modal analysis
• nondimensional frequency parameter and FEM

关键词:

• 关键词:E-glass/epoxy composite
• E-玻璃/环氧复合材料，Basalt/epoxy composite
• 玄武岩/环氧复合材料，Trapezoidal plate
• 梯形板，Modal analysis
• 模态分析，Nondimensional frequency parameter and FEM. 无量纲频率参数和FEM

Declaration of Conflicting Interests

The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Additional information

Funding

The author(s) received no financial support for the research, authorship, and/or publication of this article.