Concept Tech presented the simulation findings comparing EEVC lower legform impactor responses under inverse tests without ram friction and with a ram friction of 300 N (document GTR9-4-11). (With this, action item A-3-09 is closed.) Concept Tech had no FlexPLI model, so they used EEVC lower legform impactor model instead.

According to Concept’s findings the ram friction could have significant influence on the inverse certification test results for EEVC lower legform impactor (around 10%). During the discussion some other test houses did not fully agree. According their opinion the ram friction has only minor influence on the test results.

It was agreed that test labs should check the ram friction of their test rigs considering a velocity loss at a distance of 150 mm (action item A-4-02). In addition, Concept is requested to provide respective friction limits based on simulations (action item A-4-07).