ANALYSIS AND SIMULATION OF IMPACT LOADING ON ELASTIC BEAM STRUCTURE WITH CASE STUDIES Harijono Djojodihardjo* Faculty of Engineering, Universiti Putra Malaysia 43400 UPM Serdang, Selangor, Malaysia and Faculty of Engineering, Universitas Al-Azhar Indonesia Jalan Sisingamangaraja, Jakarta 121010, Indonesia harijono@djojodihardjo.com and Ng Pui Mei and Soo Lin Khai Graduates, Universiti Sains Malaysia 60th International Astronautical Congress 12 – 16 October 2009/ Daejeon Republic Of Korea *Professor, School of Aerospace Engineering For permission to copy or republish, contact the International Astronautical Federation 3-5 Rue Mario-Nikis, 75015 Paris, France IAC-09-C2.6.01