Method for producing a hollow composite members
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United States of America Patent
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-
Sep 9, 1997
Issued Date -
N/A
app pub date -
May 30, 1996
filing date -
Nov 3, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for producing hollow composite members, comprising the steps of: providing an outer material layer; providing a tubular supporting member within the outer layer; initially plastically expanding the supporting member to produce a connection between the outer layer and the supporting member; and subsequently plastically expanding the supporting member in a central region while simultaneously axially shortening the supporting member, so that a tensile prestress is generated in the circumferential direction and a compressive prestress is generated in the longitudinal direction of the outer layer.
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