Abstract:
Provided is a rope that can be used even by those not familiar with ropework and whose knots will not loosen or come apart. A rope with holes has at least three bonded parts obtained by bonding two cords together at fixed intervals, as well as two openings formed between adjacent bonded parts. The rope with holes can be easily tied with another rope by guiding the other rope through its openings and the knots will not loosen or come apart.
Abstract:
A rope structure of the present invention comprises a plurality of first yarns and a plurality of second yarns. The first yarns are formed of at least one material selected from the group of materials comprising HMPE, LCP, Aramids, and PBO, have a breaking elongation of approximately 2%-5%, and have a tenacity of approximately 25-45 gpd. The second yarns are formed of at least one material selected from the group of materials comprising polyolefin, polyethylene, polypropylene, and blends or copolymers of the two, have a breaking elongation of approximately 2%-12%, and have a tenacity of approximately 6-22 gpd. The first and second yarns are combined to form rope sub-components. The rope sub-components comprise approximately 20-80% by weight of the first yarns.
Abstract:
A rope structure comprising a plurality of rope subcomponents, a plurality of bundles, a plurality of first yarns, and a plurality of second yarns. The rope subcomponents are combined to form the rope structure. The bundles are combined to form the rope subcomponents. The first yarns are formed of at least one material selected from the group of materials comprising HMPE, LCP, Aramids, and PBO and have a breaking elongation of approximately 2%-5%. The plurality of second yarns are formed of at least one material selected from the group of materials comprising polyolefin, polyethylene, polypropylene, and blends or copolymers of the two and have a breaking elongation of approximately 2%-12%. The first and second yarns are combined to form the bundles.
Abstract:
A system and method for actively damping tension members modulates the natural frequency of shape memory alloys incorporated into tension members, such as suspension ropes or cables. The frequency of the tension member can be modulated by heating the shape memory alloy, such modulation preventing potentially destructive resonance with natural exciting forces.
Abstract:
A fiber cable for helicopter rescue winches includes a plurality of load-bearing synthetic-fiber strands braided with one another, at least one electrically conductive insert, and a wear indicator providing a visual check of a state of the fiber cable, where the load-bearing synthetic-fiber strands are encased in a radial direction by a friction-reducing stable fiber layer, an inner cable jacket, and outer cable jacket.
Abstract:
The invention relates to a rope made of a textile fibre material and present in the form of a core-sheath structure in a manner known per se. The rope according to the invention is characterized in that the specific strength of the rope Fs (in [daN/g core/m rope]) complies with the following formula depending on the diameter of the rope DM (in [mm]): Fs>212−DM.
Abstract:
A controlled failure rope and method of making the same. The controlled failure rope comprises first and second portions. The first portion is formed of a first material having a first set of tension failure characteristics. The second portion is formed of a second material having a second set of tension failure characteristics. The first and second sets of tension failure characteristics differ such that, when the rope is subjected to tension loads above a tension threshold, the first portion of the rope begins to fail before the second portion of the rope, therefore providing a prior indication of possible rope failure before the rope becomes completed separated.
Abstract:
A reinforcing structure designed for handling compression stress states when the structure is molded into a composite. The structure, specifically a wrapped cord with metallic filaments contained therein, is suitable for both compression and tension load forces. The reinforcing structure has a core comprising a plurality of essentially straight, nested filaments arranged in parallel, the filaments forming a line of contact with adjacent filaments that extends along the length of the filaments. Wrapped about the core is at least one helically wound wire.
Abstract:
A large diameter rope having improved fatigue life on a sheave, pulley, or drum is disclosed. This rope includes a blend of HMPE filaments and liquid crystal polymer filaments selected from the group of lyotropic polymer filaments and thermotropic polymer filaments. The rope may be constructed as a braided rope, a wire-lay rope, or a parallel core rope.