Traction element made of fiber reinforced plastic

Patent metadata

Field	Value
Publication number	US-11396138-B2
Application number	US-201615291372-A
Country	US
Kind code	B2
Filing date	Oct 12, 2016
Priority date	Oct 21, 2015
Publication date	Jul 26, 2022
Grant date	Jul 26, 2022

Abstract

A tension member with at least one loop made from fiber-reinforced plastic, which tension member has a plurality of fibers that run substantially parallel to each other, so that the loop is formed by the plurality of fibers, wherein a first group of fibers is turned over along the loop in a first turning direction, while a second group of fibers is turned over along the loop in a second turning direction, which is opposed to the first turning direction. Some of the turned-over fibers of both groups end in a different distance from the vertex of the loop than others of the turned-over fibers, so that a cross-section of the tension member that results from the respective number of fibers that run approximately parallel to each other outside the turning-over area of the fibers approximately continuously decreases until it reaches the cross-section size of the tension member.

First claim

The invention claimed is:

1. A tension member comprising:
a straight shaft section having a cross-section size and comprising a plurality of carbon fibers that run in parallel to each other, and
at least one loop made of carbon fiber-reinforced plastic, wherein the loop is formed from fiber ends of said plurality of carbon fibers of the straight shaft section by a first group of fiber ends turned over along the loop in a first turning direction with a second group of fiber ends turned over along the loop in a second turning direction, which is opposed to the first turning direction, and wherein some turned-over fiber ends of the first group of fiber ends end in a different distance from a vertex of the loop than other fiber ends of the first group of fiber ends and wherein some turned-over fiber ends of the second group of fiber ends end in a different distance from the vertex of the loop than other fiber ends of the second group of fiber ends, so that turned-over fiber ends of the first group of fiber ends, each end before a next turned-over fiber end of the first group of fiber ends, and so that turned-over fiber ends of the second group of fiber ends, each end before a next turned-over fiber end of the second group of fiber ends, and so that a cross-section of the tension member that results from a respective number of carbon fibers running approximately parallel to each other outside a turning-over area of the carbon fibers approximately continuously decreases until it reaches the cross-section size of the straight shaft section;

wherein the carbon fibers from the first group of fiber ends and the carbon fibers from the second group of fiber ends alternate respectively.

2. The tension member according to claim 1 , wherein the first group of fiber ends comprises a number of fibers that differ by a maximum 20 percent from a number of fibers of the second group of fiber ends.

3. The tension member according to claim 1 , wherein some fibers from the first group and some fibers of the second group are alternately turned over according to their respective turning direction, thereby forming the loop.

4. The tension member according to claim 1 , wherein ends of the turned-over fiber ends of the first group of fiber ends and ends of the turned-over fiber ends of the second group of fiber ends are connected to the shaft section of the tension member via a firmly bonded connection.

5. The tension member according to claim 1 , wherein the straight shaft section is a straight stretched shaft section that has a loop on at least one end.

6. The tension member according to claim 1 , wherein the straight shaft section is a straight stretched shaft section, which has at least one loop on each of a first and a second end.

7. The tension member according to claim 1 , wherein the straight shaft section is a straight stretched shaft section that on one side or on both sides divides into several cords and has a loop on each end.

8. A support structure, which comprises a plurality of tension members according to claim 1 .

9. The tension member according to claim 1 , wherein the plurality of fibers are carbon fibers and additionally comprise of glass fibers, aramid fibers, basalt fibers or natural fibers.

Assignees

• Univ Berlin Tech

Inventors

• Zwingmann Bernd
• Liu Yue
• Schlaich Mike

Classifications

• B29L2031/06

  Rods, e.g. connecting rods {, rails, stakes (shafts B29L2031/75; poles, masts, posts B29L2031/766)} · CPC title

• B29C70/347 Primary

  combined with compressing after the winding of lay-ups having a non-circular cross-section, e.g. flat spiral windings · CPC title

• B29C53/02

  Bending or folding (B29C53/22, B29C53/34, B29C53/36, B29C53/56 take precedence) · CPC title

• B29C65/48

  using adhesives {, i.e. using supplementary joining material; solvent bonding} · CPC title

• E01D19/00

  Structural or constructional details of bridges · CPC title