공극이 있는 재료의 등가 물성 도출을 위한 연구Part II : 2차원 직교 이방성 재질 조건
A Study for Estimation of Equivalent Mechanical Properties of Materials With Porosity Part II. Orthotropic Elasticity in Plane Stress
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초록
When performing finite element analysis using materials with porosity the porosity shows different mechanical properties from the existing mechanical properties of the existing base materials. In this study the equivalent properties were calculated and verified by applying the representative volume element (RVE) method and assuming that the material with porosity is a 2D orthotropic material. In case of finite element analysis using porous material or composite material, it is inefficient to perform the analysis through material modeling. Based on the element volume and element stress values derived using the finite element analysis program, the representative stress values and elastic modulus matrix were calculated using Python. In addition, equivalent properties were derived using the calculated elastic modulus matrix. The pores were simulated by etching a thin plate specimen made of STS304 material in a certain pattern, and the elastic modulus and Poisson's ratio were measured through a UTM and compared with simulation results. It was confirmed that an error of 7.028% for elastic modulus and 10% for Poisson's ratio occurred, and through this, the validity of this simulation was verified.
Abstract
When performing finite element analysis using materials with porosity the porosity shows different mechanical properties from the existing mechanical properties of the existing base materials. In this study the equivalent properties were calculated and verified by applying the representative volume element (RVE) method and assuming that the material with porosity is a 2D orthotropic material. In case of finite element analysis using porous material or composite material, it is inefficient to perform the analysis through material modeling. Based on the element volume and element stress values derived using the finite element analysis program, the representative stress values and elastic modulus matrix were calculated using Python. In addition, equivalent properties were derived using the calculated elastic modulus matrix. The pores were simulated by etching a thin plate specimen made of STS304 material in a certain pattern, and the elastic modulus and Poisson's ratio were measured through a UTM and compared with simulation results. It was confirmed that an error of 7.028% for elastic modulus and 10% for Poisson's ratio occurred, and through this, the validity of this simulation was verified.
참고문헌 (14)
- A. P. Katsoulidis, "Chemical control of structure and guest uptake by a conformationally mobile porous material", Nature, 565, pp.213~217 (2019)
- A. Slater, "Porous mateirals funtion-led design of new porous materials", Science, 348, pp.8075~ (2015)
- T. Nomura, "Impregnation of porous material with phase change material for thermal energy storage", Materials chemistry and physics, 115, pp.846~850 (2009)
- K. P. Babu, "Development of an RVE and its stiffness predictions based on mathematical homogenization theory for short fibre composites", International journal of solids and structures, 130-131, pp.80~114 (2018)
- K. Breuer, "RVE modelling of short fiber reinforced thermoplastics with discrete fiber orientation and fiber length distribution", SN Appl. Sci, 2, pp.91~ (2020)
- S. Bargmann, "Generation of 3D representative volume elements for heterogeneous materials : A review", Progress in materials science, 96, pp.322~384 (2018)
- Y. Pan, "Generation of 3D representative volume elements for heterogeneous materials : A review", Composites sciences and technology, 68, pp.2792~2798 (2008)
- P. J. Blanco, "Variational foundations and generalized unified theory of RVE-based multiscale models", Arch Computation Methods Eng, 23, pp.191~253 (2016)
- C. A. Felippa, "Introduction to finite element methods", ~ (2004)
- 강유진, "캔틸레버보의 형상비에 따른 1차원 보와 2차원 평면응력 유한요소해석 결과의 비교", 한국전산구조공학회논문집, 28(5), pp.459~466 (2015), 한국전산구조공학회[DOI]
- "Abaqus Documentation", ~
- C. Pyo, "Estimation of Heat Source Model’s Parameters for GMAW with Non-linear Global Optimization—Part I : Application of Multi-island Genetic Algorithm", Metals, 10(7), pp.885~ (2020)
- D. Deng, "Numerical simulation of temperature field and residual stress in multi-pass welds in stainless steel pipe and comparison with experimental measurements", Computational Materials Science, 37(3), pp.269~277 (2006)