목차

목 차
요약 ··································································································································ⅰ
표목차 ······························································································································ⅲ
그림목차 ··························································································································ⅳ
I. 서 론 ···························································································································· 1
1.1 연구 배경 ················································································································· 1
1.2 연구 현황 ················································································································· 1
1.3 연구 목적 및 범위·································································································· 2
II. 이론적 고찰 ············································································································· 3
2.1 3D 프린팅 ················································································································ 3
2.1.1 기술의 현황 ········································································································ 3
2.1.2 기술의 원리 ········································································································ 3
2.1.3 기술의 종류 ········································································································ 4
2.1.4 기술응용개발 동향 및 고찰 ············································································ 7
2.2 사출성형 ··················································································································· 8
2.2.1 사출금형 ·············································································································· 8
2.2.2 사출공정 ············································································································ 10
2.2.3 고찰 ···················································································································· 13
2.3 피로 ························································································································· 13
2.3.1 개요 ···················································································································· 13
2.3.2 반복하중의 종류 ······························································································ 13
2.3.3 피로수명선도 ···································································································· 14
2.3.4 수명예측방법 ···································································································· 15
2.3.5 반복하중에 따른 소재의 피로거동 ······························································ 16
2.3.6 파괴역학적 관점에서 파단면 분석 ······························································ 17
2.3.7 소결된 PA2200의 피로시험을 위한 고찰 ··················································· 18
III. 소결된 PA2200 소재의 기계적 물성 및 피로특성 ··········································· 19
3.1 시편제작 및 실험장비 구성 ··············································································· 19
3.1.1 소재 ···················································································································· 19
3.1.2 시편형상 ············································································································ 20
3.1.3 적층장비 ············································································································ 20
3.1.4 적층제조방법 ···································································································· 21
3.1.5 시편보관 ············································································································ 22
3.1.6 인장시험 및 피로시험장비 ············································································ 24
3.2 PA2200의 기계적 물성 측정 실험 및 결과 ···················································· 26
3.2.1 시험목적 ············································································································ 26
3.2.2 시험속도에 따른 PA2200의 기계적 물성 측정 실험 방법 ····················· 26
3.2.3 시험속도에 따른 PA2200의 기계적 물성 측정 실험 결과 및 고찰 ····· 27
3.2.4 시험속도에 따른 PA2200의 Self-heating 측정 실험 방법 ····················· 28
3.2.5 시험속도에 따른 PA2200의 Self-heating 측정 실험 결과 및 고찰 ····· 28
3.2.6 온도에 따른 PA2200의 기계적 물성 측정 실험방법 ······························· 29
3.2.7 온도에 따른 PA2200의 기계적 물성 측정 실험결과 및 고찰 ··············· 29
3.3 PA2200의 피로특성 측정 실험 및 결과 ·························································· 31
3.3.1 시험목적 및 실험 방법 ·················································································· 31
3.3.2 반복하중에 따른 PA2200의 피로시험결과 및 고찰 ································· 31
3.3.3 반복하중에 따른 PA2200의 피로거동 ························································· 34
3.4 주사전자현미경(SEM)을 통한 파단면 분석 ····················································· 37
3.4.1 단순하중에 따른 PA2200의 파단면 분석 ··················································· 37
3.4.2 반복하중에 따른 PA2200의 파단면 분석 ··················································· 38
IV. 피로수명예측 해석 및 분석 ··············································································· 42
4.1 피로수명 예측 해석의 준비 ············································································· 42
4.1.1 해석 목적 ·········································································································· 42
4.1.2 해석 방법 ·········································································································· 42
4.1.3 해석 모델 ·········································································································· 43
4.1.4 유한요소모델 ···································································································· 45
4.2 사출성형해석 ········································································································· 46
4.2.1 사출성형 공정조건 ·························································································· 46
4.2.2 사출성형해석 결과 및 데이터연동 ······························································ 47
4.3 폴리머 사출금형코어 응력해석 ········································································· 48
4.3.1 해석조건의 설정 ······························································································ 48
4.3.2 구조해석 및 피로해석 결과 ·········································································· 49
4.3.3 수명분석 및 고찰 ···························································································· 51
V. 결론 ·························································································································· 53
참고문헌 ························································································································ 54
영문초록(Abstract) ······································································································· 57