Tapered double cantilever beam (TDCB) specimens are the most commonly used test configurations to measure the fracture toughness of composites and adhesive joints. The material used in this study is aluminum alloy. For the impact analysis, load and displacement applied from pin onto end block as well as the crack energy release rate are calculated and compared with the finite element analysis results. The energy release rate increases with the velocity increases. As TDCB model with the same condition as experiment is simulated and analyzed, the fracture behavior can be estimated with the analysis result similar to experiment. The simulation results can be agreed with experimental graph and all experimental data at this study can be verified. These experimental results can be applied into real field effectively. It is found that the energy release rates measured from impact tests on the specimens can be predicted by the finite element model suggested in this study.

Abstract
 1. 서론
 2. 연구방법
  2.1 실험장치 및 실험모델
  2.2 해석조건
 3. 해석 결과와 실험에 의한 검증 및 고찰
  3.1 충격속도 7.5m/s의 충격 해석과 실험 결과 비교 및 검증
  3.2 2.5m/s, 7.5m/s 및 12.5m/s의 충격 속도에 대한 해석결과들의 비교
 4. 결론
 후기
 참고문헌

• 고등(공주대학교 기계공학과 대학원) | Teng Gao
• 조재웅(공주대학교 기계자동차공학부) | Jae-Ung Cho Corresponding Author