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Assessment of Kernmantle Ropes in terms of Sheath Slippage: Method and Results Cover

Assessment of Kernmantle Ropes in terms of Sheath Slippage: Method and Results

Fibres & Textiles in Eastern Europe
Volume 30 (2022): Issue 6 (December 2022)
By: Krzysztof Baszczyński  
Open Access
|Dec 2022

Figures & Tables

Fig. 1

Guided type fall arrester protecting against falls from height with a flexible anchor line made of kernmantle rope: 1 – flexible anchor line (kernmantle rope), 2 – guided type fall arrester (A – closed, B – open)
Guided type fall arrester protecting against falls from height with a flexible anchor line made of kernmantle rope: 1 – flexible anchor line (kernmantle rope), 2 – guided type fall arrester (A – closed, B – open)

Fig. 2

Examples of damage to flexible anchor line
Examples of damage to flexible anchor line

Fig. 3

Diagram of a kernmantle rope loading system for sheath slippage testing [6,7]: F – loading force, V – rope movement speed, 1 –kernmantle rope tested, 2 – movable steel plates, 3 – fixed steel plates
Diagram of a kernmantle rope loading system for sheath slippage testing [6,7]: F – loading force, V – rope movement speed, 1 –kernmantle rope tested, 2 – movable steel plates, 3 – fixed steel plates

Fig. 4

Design of the rope clamping module: 1 – the rope tested, 2 – movable and fixed plates, 3 – supporting structure, 4 – weights exerting a loading force of F = 50 N on the plates, 5 – Kevlar string I
Design of the rope clamping module: 1 – the rope tested, 2 – movable and fixed plates, 3 – supporting structure, 4 – weights exerting a loading force of F = 50 N on the plates, 5 – Kevlar string I

Fig. 5

Sample design of plates on a stand for testing sheath slippage in kernmantle ropes: a – movable plate, b – fixed plate
Sample design of plates on a stand for testing sheath slippage in kernmantle ropes: a – movable plate, b – fixed plate

Fig. 6

Stand for testing sheath slippage in kernmantle ropes: 1 – rope compression module, 2 –rope tested, 3 – Kevlar string I, 4 – drive module, 5 – Zwick testing machine
Stand for testing sheath slippage in kernmantle ropes: 1 – rope compression module, 2 –rope tested, 3 – Kevlar string I, 4 – drive module, 5 – Zwick testing machine

Fig. 7

Drive module of the stand for testing sheath slippage in kernmantle ropes: 1 – Kevlar string I, 2 – string I reel, 3 – Kevlar string II, 4 – string II roller, 5 – string II tensioner, V – traverse speed of the Zwick testing machine
Drive module of the stand for testing sheath slippage in kernmantle ropes: 1 – Kevlar string I, 2 – string I reel, 3 – Kevlar string II, 4 – string II roller, 5 – string II tensioner, V – traverse speed of the Zwick testing machine

Fig. 8

Speed of the test rope moving through the compression module over time
Speed of the test rope moving through the compression module over time

Fig. 9

Kernmantle ropes subjected to sheath slippage tests
Kernmantle ropes subjected to sheath slippage tests

Fig. 10

Sample results of kernmantle rope sheath slippage tests: A – negative displacement, B – positive displacement
Sample results of kernmantle rope sheath slippage tests: A – negative displacement, B – positive displacement

Fig. 11

Results of kernmantle rope sheath slippage tests
Results of kernmantle rope sheath slippage tests

Kernmantle ropes subjected to sheath slippage tests and the results obtained

Rope symbolRope typeRope diameter d [mm]Mean sheath slippage SSm [mm]Standard deviation SD [mm]Coefficient of variation for SD Wsx [%]
ATitan 11111.40.9617768.7
BIceline8.1−0.780.3033238.9
CAqualine9.510.60.418333.9
DPro-Static101.50.6123740.8
EWall master VI10.5−1.060.4393241.4
FApollo II11−0.660.2073631.4
GPerformance Static127.51.1180314.9
HPes 12-K-24125.11.2062323.7
IPa-200-12-K 24x21210.11.4815514.7
JTendon11−2.660.421915.9
KBaobab Uni Core13.51.340.3781528.2
DOI: https://doi.org/10.2478/ftee-2022-0053 | Journal eISSN: 2300-7354 | Journal ISSN: 1230-3666
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Language: English
Page range: 67 - 73
Published on: Dec 30, 2022
Published by: Łukasiewicz Research Network, Institute of Biopolymers and Chemical Fibres
In partnership with: Paradigm Publishing Services
Publication frequency: Volume open
Keywords:
kernmantle ropes,
sheath slippage,
falls from a height,
guided type fall arresters
Related subjects:
Business and economics,
Business management,
Business informatics,
Process management,
Industrial chemistry,
Cellulose, paper and textiles,
Polymer science and technology,
Materials sciences,
Biomaterials and natural materials

© 2022 Krzysztof Baszczyński, published by Łukasiewicz Research Network, Institute of Biopolymers and Chemical Fibres
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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