• 한국군사과학기술학회지
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• 제14권4호
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• pp.726-731
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• 2011

Polymers containing tetrazole groups are very attractive as energetic materials. Copolymer having tetrazole groups could be obtained by 3-steps from commercially available epichlorohydrin. These methods provide a new synthetic pathway to construct polymers containing tetrazole groups from non-energetic polynitrile compounds. These polymers are expected to be good candidates for green and high energetic materials.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2007년도 제28회 춘계학술대회논문집
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• pp.238-241
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• 2007

We present an innovative method of multi-physics application involving energetic materials. Energetic materials are related to reacting flows in extreme environments such as fires and explosions. They typically involve high pressure, hish temperature, strong non-linear shock waves, and high strain rate deformation of metals. We use an Eulerian methodology to address these problems. Our approach is naturally free from large deformation of materials that makes it suitable for high strain-rate multi-material interaction problems. Furthermore we eliminate the possible interface smearing by using the level sets. We have devised a new level set based tracking framework that can elegantly handle large gradients typically found in reacting gases and metals. We show several work-in-progress applications of our algorithm including the Taylor impact test, explosive venting and additional confined explosion problems of modem interest.

• Bulletin of the Korean Chemical Society
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• 제34권8호
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• pp.2503-2506
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• 2013

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2008년 영문 학술대회
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• pp.311-319
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• 2008

We present an innovative method of multi physics application involving energetic materials. Energetic materials are related to reacting flows in extreme environments such as fires and explosions. They typically involve high pressure, high temperature, strong shock waves and high strain rate deformation of metals. We use an Eulerian methodology to address these problems. Our approach is naturally free from large deformation of materials that make it suitable for high strain rate multi-material interacting problems. Furthermore we eliminate the possible interface smearing by using the level sets. We heave devised a new level set based tracking framework that can elegantly handle large gradients typically found in reacting gases and metals. We show several work-in-progress application of our integrated framework.

• Bulletin of the Korean Chemical Society
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• 제33권8호
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• pp.2765-2768
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• 2012

• Bulletin of the Korean Chemical Society
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• 제32권10호
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• pp.3802-3804
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• 2011

• Bulletin of the Korean Chemical Society
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• 제30권9호
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• pp.2152-2154
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• 2009

• 한국항공우주학회지
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• 제37권6호
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• pp.571-579
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• 2009

에너지 물질과 같이 연소 반응을 하는 압축성 물질을 해석하기 위하여 Hydro-SCCM (Shock Compression of Condensed Matter)이라는 에너지 물질과 비반응 물질을 포함한다중 물질 해석툴을 개발하였다. 고에너지 물질은 강한 충격파와 고온과 고압을 가진 물질경계면에서 높은 변형률을 발생시킨다. 이러한 큰 구배를 가진 현상을 해석하기 위하여 새로운 오일러리안 기법을 사용하였다. 본 논문에서는 현상을 해석하기 위한 수학적 방법과 해석결과를 소개하였다.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2011년도 제37회 추계학술대회논문집
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• pp.274-278
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• 2011

다양한 고에너지 물질이 포함된 폭발 장치를 정확하게 해석하기 위해서는 고에너지 물질의 다양한 연소 현상과 주변을 둘러싸고 있는 고체물질에 대한 대변형 현상을 정확하게 모사하는 것이 필수적이다. 이를 위하여 본 연구에서는 다중물질 각각의 경계면을 level set 함수를 이용하여 정확하게 표현하였으며, 경계면은 ghost fluid 기법을 사용하여 나타내었다. 각각의 물질에 대하여 대변형에 적합한 구성방정식을 사용하였으며, 지배방정식을 고차의 수치해석 기법을 사용하여 해석하였다. 다양한 폭발장치 중 실험적인 데이터를 이용하여 검증이 가능한 rate stick 문제를 해석하였으며, 실험과 유사한 결과를 획득하였다.

• Current Optics and Photonics
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• 제8권2호
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• pp.138-150
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• 2024

This study is essential for advancing our knowledge about the interaction between long-range high-power lasers and energetic materials, with a particular emphasis on understanding the response of a 155-mm shell under various surface irradiations, taking into account external factors such as atmospheric disturbances. The analysis addresses known limitations in understanding the use of non-realistic targets and the negligence of ambient conditions. The model employs the three-dimensional level-set method, computer-aided design (CAD)-based target design, and a message-passing interface (MPI) parallelization scheme that enables rapid calculations of the complex chemical reactions of the irradiated high explosives. Important outcomes from interaction modeling include the accurate prediction of the initiation time of ignition, transient pressure, and temperature responses with the location of the initial hot spot within the shell, and the relative magnitude of noise with and without the presence of physical ambient disturbances. The initiation time of combustion was increased by approximately a factor of two with atmospheric disturbance considered, while slower heating of the target resulted in an average temperature rise of approximately 650 K and average pressure increase of approximately 1 GPa compared to the no ambient disturbance condition. The results provide an understanding of the interaction between the high-power laser and energetic target at a long distance in an atmospheric condition.