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논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 김인걸
- 발행연도
- 2019
- 저작권
- 충남대학교 논문은 저작권에 의해 보호받습니다.
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이 논문의 연구 히스토리 (4)
2017
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초록· 키워드
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As an alternative of the existing honeycomb shock absorbing device, the new approach on shock absorbing design using the extrusion of hyper-viscoelastic material such as Silicone rubber is studied in this paper. The strain energy and stress-strain characteristic of viscoelastic material at extrusion process through the metered orifice has a similarity with the honeycomb core for maximizing shock absorbing capability. In order to evaluate the design feasibility of this newly conceived shock absorbing device using Silicone rubber extrusion mechanism, the cylindrical shape specimen with multi-stage extrusion is manufactured for quasi-static compression test.
In this paper, three silicone materials(Xinus SH0189, SH2115, SH3264) with the different shore A hardness are selected as hyper-viscoelastic material and quasi-static compression tests of three Siliconee material are preformed for understanding load-stroke characteristic in the process of silicone extrusion. It can be found that experimental compression test results have a sufficient consistence with the numerical analysis using LS-Dyna in quasi-static conditions. Through the dynamic numerical analysis of LS-Dyna, it can be understood that the maximum absorbed kinetic energy which can be absorbed by Silicone extrusion mechanism depend upon the several design factors such as friction coefficients, extrusion ratio and Silicone shore A.
Finally, it can be presented in this paper that the maximum absorbed kinetic energy for the specified extrusion geometry can be estimated in advance as a preliminary design guideline for shock absorbing device using extrusion mechanism of hyper-viscoelastic material.
In this paper, three silicone materials(Xinus SH0189, SH2115, SH3264) with the different shore A hardness are selected as hyper-viscoelastic material and quasi-static compression tests of three Siliconee material are preformed for understanding load-stroke characteristic in the process of silicone extrusion. It can be found that experimental compression test results have a sufficient consistence with the numerical analysis using LS-Dyna in quasi-static conditions. Through the dynamic numerical analysis of LS-Dyna, it can be understood that the maximum absorbed kinetic energy which can be absorbed by Silicone extrusion mechanism depend upon the several design factors such as friction coefficients, extrusion ratio and Silicone shore A.
Finally, it can be presented in this paper that the maximum absorbed kinetic energy for the specified extrusion geometry can be estimated in advance as a preliminary design guideline for shock absorbing device using extrusion mechanism of hyper-viscoelastic material.
목차
1 서론1.1 연구 배경1.2 기존 충격완충장치 연구사례1.3 연구 목표 및 내용2 연구에 필요한 이론적 근거2.1 압출역학(Extrusion mechanics)2.2 초탄성(Hyperelasticity)2.3 점탄성(Viscoelasticity)3 실리콘 압출 충격완충장치에 대한 준정적 압축실험3.1 실리콘 재료 선정 및 검증3.2 실리콘 압출 충격완충장치 제안 및 장치구성3.3 실리콘 압출 충격완충 실험장치 제작3.4 실리콘 압출 준정적 압축실험 및 결과 분석4 실리콘 압출 충격완충장치에 대한 동적 수치해석4.1 실리콘 압출 충격완충장치 LS-Dyna 해석 모델4.2 실리콘 압출 충격완충 모델별 동적 충격완충 해석5 실리콘 압출 충격완충 결과 및 고찰5.1 단위중량당 충격완충 에너지 소산 성능 분석5.2 충격완충 동적해석 결과 및 분석6 결론참고 문헌
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