EFFECTS OF IMPACT LOCATION AND ANGLE OF A FLYING CROSS BAR ON THE PROTECTION OF A LONG-ROD PENETRATOR Yo-Han Yoo 1 , Seung Hoon Paik 2 , Jong-Bong Kim 3 and Hyunho Shin 4 1 Agency for Defense Development, Yuseong, Daejeon 305-600, Republic of Korea 2 Korea Institute of Construction & Transportation Technology Evaluation and Planning, Anyang, Gyeonggi-do 431-060, Republic of Korea 3 Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology, Seoul, 139-743, Republic of Korea 4 Department of Materials Engineering, Gangneung-Wonju National University, Gangneung, Gangwon-do 210-702, Republic of Korea E-mail: hshin@gwnu.ac.kr Received October 2012, Accepted May 2013 No. 12-CSME-103, E.I.C. Accession 3423 ABSTRACT Based on a finite element analysis, the performance of a flying cross bar in protecting a long-rod penetrator increases as the impact location moves toward the head of the penetrator. It also increases as the impact angle approaches right angle. The optimal impact location along the span direction of the bar varies depending on the bar diameter. Keywords: flying cross bar; long-rod penetrator; depth of penetration; lateral disturbance. CONCENTRATION ET ANGLE D’IMPACT D’UNE BARRE TRANVERSALE EN VOL ET LEURS EFFETS SUR LA PROTECTION D’UN PÉNÉTRATEUR LONGUE TIGE RÉSUMÉ Basé sur l’analyse des éléments finis, la performance d’une barre transversale en vol pour la protection d’un pénétrateur longue tige augmente à mesure que la concentration de l’impact se déplace vers la tête du péné- trateur. Elle augmente aussi à mesure que l’angle d’impact se rapproche de l’angle droit. La concentration optimale de l’impact le long de direction de la barre varie en fonction du diamètre de la barre. Mots-clés : barre transversale en vol ; pénétrateur longue tige ; profondeur de la pénétration ; perturbation latérale. Transactions of the Canadian Society for Mechanical Engineering, Vol. 37, No. 4, 2013 1115