This is the third and final part of a 90 slide lecture.
Go back to Part 1 (the first 30 slides)
Go back to Part 2 (the middle 30 slides)
Picture showing the static test set up. A wheelchair back surface is mounted to the rods of the test fixture with manufacturer provided hardware.
A ‘surrogate’ butt was placed on top of the back surface and with an Instron loading instrument a downward force was applied to the wheelchair back or seat surface.
These graphics show that all wheelchair back surfaces with attachment hardware failed to sustain the crash load during static test because of attachment hardware failure.
Attachment hardware bent severely, the drop hook type hardware was flattened, and the pin shaped lower hardware was released from the retention slots.