1989-02-01

Analysis of the Influence of Various Side Impact Test Procedures 890378

A side impact study using eight impact configurations was conducted in conformity with a test method proposed by the U.S. (NHTSA) and another method currently under study in Europe (EEVC). On the basis of the data obtained, parameters possibly influencing the injury value of a dummy were examined. Also, the possibility of developing an alternative test in which the MDB (moving deformable barrier) is replaced by an MRB (moving rigid barrier) was considered. The results are as follows:
  1. (1)
    Comparison of NHTSA and EEVC Test Methods
    1. 1)
      Difference Between NHTSA and EEVC Methods
      The U.S. NHTSA and European EEVC test methods caused widely different dummy injury values due to the different test conditions of the MDB, the crabbed angle, and the dummy. Therefore, these cannot be regarded as equivalent test methods.
    2. 2)
      Influence of MDB
      Test results indicated that the shape and stiffness of the MDB have a large influence on the dummy injury value, so that an MDB specification should be formulated to represent the characteristics of vehicles on the market.
    3. 3)
      Influence of Crabbed Angle
      The influence of a non- or 27° crabbed angle on the dummy injury value differs at the front and rear seats. Consequently, the necessity for a crabbed angle varies in accordance with whether the test emphasis is placed primarily on front occupants or on and rear occupants equally. This should be carefully decided on the basis of data on actual accidents.
    4. 4)
      Influence of Dummy
      Test results indicated that SID and EUROSID did not show similar responses when tested under the same conditions. Improvements must be made in these dummies including an effort to better biofidelity characteristics.
  2. (2)
    Examination of Alternative Test Method
    A test using an MRB was conducted to study the possible development of a alternative test not requiring the use of an MDB. Although in this MRB-employed test result, the contact velocity and the deformation at dummy's sitting position were not the same as those in MDB-employed tests, the results indicated that the dummy responses in the two types of tests could be made the same by changing the MRB test conditions.

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