계면 특성을 고려한 무작위 섬유배치를 갖는 단방향 복합재료의 가로방향 기계적 물성 예측 및 보정
Prediction and Calibration of Transverse Mechanical Properties of Unidirectional Composites with Random Fiber Arrangement Considering Interphase Effect
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초록
본 연구에서는 섬유, 기지 및 계면으로 구성된 단방향 복합재료의 대표체적요소를 이용해서 가로방향 기계적 물성을 계면 특성 변화에 따라 예측하고 시험결과에 맞춰 계면의 특성의 보정을 실시하였다. 섬유와 기지로 모델링 된 기존의 대표체적요소는 섬유 길이방향 기계적 물성에 대해 예측 정확도가 높으나 가로방향에 대하여 어느 정도의 편차를 보인다. 따라서, 이런 차이를 보완하기 위해 계면 영역을 도입하였고, 계면의 두께, 탄성 물성과 강도 파라미터에 따라 기계적 물성을 보정하여 복합재료 대표체적요소를 통한 예측의 정확도를 향상시켰다. 그 결과, 복합재료 대표체적요소의 길이방향 물성의 정확도는 유지한 채 가로방향 강성 및 강도의 정확도가 향상됨을 확인하였다.
Abstract
In this study, the transverse mechanical properties of the unidirectional fiber reinforced composite modeled with fiber, matrix, and interphase is predicted with the representative volume elements and is calibrated by adjusting the properties and thickness of the interphase by referring to the test results. While the conventional representative volume elements modeled with fiber and matrix shows high predictive accuracy for the longitudinal mechanical properties, but it shows some deviations in the transverse mechanical properties. In order to compensate such gaps, the interphase region is employed, and its mechanical properties are adjusted to improve the prediction accuracy according to various elastic modulus, thickness, and strength parameters. As a result, the deviation of the transverse elastic modulus and strength is reduced significantly similar to the test results of the unidirectional composites with the accuracy of the longitudinal mechanical properties preserved.
참고문헌 (15)
- 이원오, "열가소성 유리섬유", PP 복합재의 반구돔 열성형 평가 및비직교 구성방정식을 이용한 FEM 수치해석, 2016, pp.29(5), 236~242[DOI]
- 임재문, "육각 격자구조를 갖는 콘형 복합재 격자구조체의구조안전성 평가 기법 연구", Composites Research, 31(4), pp.156~160 (2018), 한국복합재료학회
- Hinrichsen, E. L., "Geometry of Random Sequential Adsorption", Journal of Statistical Physics, 44(5-6), pp.793~827 (1986)
- Vaughan, T. J., "A Combined Experimentalnumerical Approach for Generating Statistically Equivalent Fibre Distributions for High Strength Laminated Composite Materials", Composites Science and Technology, 70(2), pp.291~297 (2010)
- Wang, W., "Micromechanical Modeling of Fiber-Reinforced Composites with Statistically Equivalent Random Fiber Distribution", Materials, 9(8), pp.624~ (2016)
- Yang, L., "A New Method for Generating Random Fibre Distributions for Fibre Reinforced Composites", Composites Science and Technology, 76, pp.14~20 (2013)
- Park, S. M., "Comparison of the stress-strain curve of E-Glass", MY750RVE with and without interphase Generator of Random Fiber Distribution with Diverse Volume Fractions by Random Fiber Removal, 2019, pp.167, 302~316
- Drzal, L., "Interfaces and Interphases" (2001), ASM International
- Riaño, L., "Effect of Interphase Region on the Elastic Behavior of Unidirectional Glassfiber", epoxy Composites, 2018, pp.198, 109~116
- Na, W. J., "Prediction of the Tensile Strength of Unidirectional Carbon Fiber Composites Considering the Interfacial Shear Strength", Composite Structures, 168, pp.92~103 (2017)
- Kaddour, A. S., "Input Data for Test Cases Used in Benchmarking Triaxial Failure Theories of Composites", Journal of Composite Materials, 46(19-20), pp.2295~2312 (2012)
- "ABAQUS 6.14 DOCUMENTATION", Dassault Systemes Simulia Corp, ~ (2014)
- Jeong, G., "A Virtual Experimental Approach to Evaluate Transverse Damage Behavior of a Unidirectional Composite Considering Noncircular Fiber Cross-sections", Composite Structures, 228, pp.111~369 (2019)
- Wang, X. Q., "Effects of Interphase Properties in Unidirectional Fiber Reinforced Composite Materials", Materials & Design, 32(6), pp.3486~3492 (2011)
- Liu, Z., "An Extended Micromechanics Method for Probing Interphase Properties in Polymer Nanocomposites", Journal of the Mechanics and Physics of Solids, 95, pp.663~680 (2016)