Point-Wise 방법을 이용한 크립 실험 데이터에서 동적 탄성률 데이터로의 직접 변환 = Direct Conversion of Creep Data to Dynamic Modulus using Point-Wise method

다국어 초록 (Multilingual Abstract)

For better understanding of viscoelastic material, it is of importance to measure viscoelastic data as possible as wider range of frequency or time for better understanding of viscoelastic material. Especially, terminal region has rich information about molecular structure. However, wide range measurement of most test methods is limited except creep test unless time-temperature superposition is available. Hence, conversion of creep data to dynamic modulus could be a good solution to overcome this limitation. In this study, we adopted point-wise method which uses low degree of polynomial regression in order to improve the algorithm of Kwon et al. This algorithm reduces the waviness in the terminal regime dramatically compared with the previous method which is based on higher order polynomial regression.

목차 (Table of Contents)

• 목 차
• 1. 서 론 １
• 2. 이론적 배경 ３
• 2-1. 선형 점탄성(Linear Viscoelasticity) ３
• 2-2. 기존의 변환 방법 ７
• 2-3. Point-Wise 방법을 이용한 직접 변환 개선 14
• 3. 결과 및 고찰 20
• 3-1. 다항식 차수와 하위 집합 데이터 개수 설정 20
• 3-2. 기존 방법과 비교 26
• 4. 실험 결과에 적용 31
• 5. 결 론 36
• 6. 참고 문헌 36
• 영문 초록 38