2008 年 34 巻 2 号 p. 51-59
In the automotive industry, trial and error systems are adopted to the design. This system is disadvantageous concerning cost and time. Therefore, the simulation technology with the reliability has been required. The objective of this study is to establish the simulation technology for impact response behavior of rectangular CFRP tubes under full-lap collision. We adopted drop weight impact tests to investigate response behavior and energy absorption characteristics of the rectangular CFRP tubes. The impact test was carried out by dropping the impactor from height of 12 m. The speed was approximately 55 km/h just before the impact. The weight of the impactor was 105 kg. The same tendency of the impact response was observed for the five specimens. A finite element (FE) model was also developed by using a nonlinear, explicit dynamic code LS-DYNA to simulate the progressive failure behavior and to calculate the absorbed energy of the rectangular CFRP tubes under impact load. The maximum load, absorbed energy and maximum displacement calculated by FEM model were in good agreement with the average values of the test results.