Single-layer multi-strand cable having improved energy at break and an improved total elongation
AssigneeCompagnie Generale Des Etablissements Michelin
InventorsGael Pataut, Henri Barguet, Lucas Lauby, Olivier Reix
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Abstract
A multi-strand cord (50) having a 1×N structure comprises a single layer (52) of N strands (54) wound in a helix about a main axis (A), each strand (54) having one layer (56) of metal filaments (F1) and comprising M>1 metal filaments wound in a helix about an axis (B). The cord (50) has a total elongation At>8.10% and the energy-at-break indicator Er of the cord (50), defined by Er=∫0Atσ(Ai)×dAi where σ(Ai) is the tensile stress in MPa measured at the elongation Ai and dAi is the elongation such that Er is strictly greater than 52 MJ/m3.
Claims18
A multi-strand cord having a 1×N structure comprising a single layer of N strands wound in a helix about a main axis, each strand having one layer of metal filaments and comprising M>1 metal filaments wound in a helix about an axis,
- wherein the multi-strand cord has a total elongation At>8.10% determined by the standard ASTM D2969-04 of 2014, and
- wherein an energy-at-break indicator Er of the multi-strand cord, defined by Er=∫0Atσ(Ai)×dAi, where σ(Ai) is a tensile stress in MPa measured at an elongation Ai and dAi is an elongation such that Er is strictly greater than 52 MJ/m3.
An extracted cord extracted from a polymer matrix, the extracted cord having a 1×N structure comprising a single layer of N strands wound in a helix about a main axis, each strand having one layer of metal filaments and comprising M>1 metal filaments wound in a helix about an axis,
- wherein the extracted cord has a total elongation At′≥5.00% determined by the standard ASTM D2969-04 of 2014, and
- wherein an energy-at-break indicator Er′ of the extracted cord, defined by Er′=∫0At′σ(Ai)×dAi, where σ(Ai) is a tensile stress in MPa measured at an elongation Ai and dAi is an elongation such that Er′ is strictly greater than 35 MJ/m3.
Dependencies are inferred from the claim text.