Department News

Numerical Simulation of High-Velocity impact/Penetration

Seminar Date 2004-12-16
Author
지국현
Date
2004-12-16
Views
1921
1. 제 목 : Numerical Simulation of High-Velocity impact/Penetration





2. 연 사 : 유요한 박사 (국방과학연구소)





3. 일 시 : 2004년 12월 20일 (월) 14:00 - 15:00





4. 장 소 : 서울대학교 신공학관(301동) 1512호 세미나실 (15층)








5. 내 용 :





A three-dimensional Lagrangian explicit time-integration finite element code for analyzing the dynamic impact phenomena was developed. It uses four node tetrahedral elements. In order to consider the effects of strain rate hardening, strain hardening and thermal softening, which are frequently observed in high-velocity deformation phenomena, Johnson-Cook model is used as constitutive model. For more accurate and robust contact force computation, the defense node contact algorithm was adopted and implemented. In order to evaluate the performance of the newly developed three-dimensional hydrocode NET3D, numerical simulations of high-velocity oblique impact/penetration phenomena were carried out.





6. 약 력


1984.2 서울대학교 공과대학 기계설계학과 졸업


1986.2. 한국과학기술원 생산공학과 석사


1997.2 한국과학기술원 기계공학과 박사


1986.3 ~ 현재 국방과학연구소 선임연구원


7. 문 의 : 기계항공공학부 김승조 교수 (☏ 880-7388)