원통형 복셀 모델과 유한차분법 기반 섬유강화복합재료 열전달 시뮬레이션의 적분방법별 연산시간 분석

The heat transfer process of fiber-reinforced composite materials depends on heterogeneous and complex boundary conditions, which limit the use of various conventional numerical methods. In this study, the finite difference method (FDM) was used to facilitate efficient numerical analysis. Fibers and fabrics were modeled as a series of cylinders and then transformed to a bulk of cubic-shaped element, known as “voxels,” to implement the FDM. Each voxel contained a heat transfer coefficient of the matrix or reinforcement fiber, considering the fiber orientation angle. Two types of time integration methods, i.e., the explicit-Euler and implicit–explicit hybrid integration schemes, were adopted, and their calculation times were compared.