Energy absorbing composite tube
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United States of America Patent
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-
Aug 5, 2003
Grant Date -
N/A
app pub date -
May 31, 2002
filing date -
May 31, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An energy absorbing composite tube for both mounting an impact member to a structure and absorbing impact energy. The composite tube includes a mounting portion that is inserted into a sleeve within the structure. A main tubular body portion is provided that is integral with the mounting portion. The main tubular body portion has a larger diameter than the mounting portion to provide an impact shoulder. A delamination wedge is forced against the shoulder during an impact to cause delamination of the main tubular body portion. The delamination process absorbs energy from the impact. The mounting portion slides within the mounting sleeve during the impact so that it remains intact and provides a structural connection between the main tubular body portion and the impact member. The energy absorbing composite tube may be used to replace bumper mounting systems which utilize metallic tubes as part of the bumper mounting/energy absorption system.
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