ISO 6266:2013

Alpine skis - Determination of fatigue indexes - Cyclic loading test

ISO 6266:2013 specifies a method for the determination of the fatigue indexes of alpine skis (i.e. the resistance of the skis to changes in shape and of stiffness) after a bending test with cyclic loading.

Skis alpins — Détermination des indices de fatigue — Essai en flexion alternée

L'ISO 6266:2013 spécifie une méthode de détermination des indices de fatigue des skis alpins (c'est-à-dire la résistance des skis aux modifications de forme et de raideur) après essai en flexion alternée.

Alpske smuči - Določevanje utrujenosti - Preskus s cikličnim obremenjevanjem

Ta mednarodni standard določa metodo za določevanje utrujenosti alpskih smuči (tj. odpornost smuči na spremembe oblike in togosti) po preskusu s cikličnim obremenjevanjem.

General Information

• Status: Published
• Publication Date: 25-Feb-2013
• ICS: 97.220.20 - Winter sports equipment
• Technical Committee: ISO/TC 83/SC 4 - Snowsports equipment
• Drafting Committee: ISO/TC 83/SC 4/WG 3 - Skis and snowboards
• Current Stage: 9093 - International Standard confirmed
• Start Date: 04-Sep-2023
• Completion Date: 13-Dec-2025
• Ref Project: SIST ISO 6266:2017 - Alpine skis - Determination of fatigue indexes - Cyclic loading test

Relations

• Revises: ISO 6266:1980 - Alpine skis - Determination of fatigue indexes - Cyclic loading test
• Effective Date: 12-Nov-2011

Overview - ISO 6266:2013 (Alpine skis - Fatigue indexes, cyclic loading test)

ISO 6266:2013 specifies a standardized laboratory method to determine the fatigue indexes of alpine skis - i.e., the permanent change in shape and stiffness after a bending cyclic loading test. The method quantifies two key parameters: bottom camber height and centre spring constant, after subjecting skis to repeated flexing and a defined recovery period. This standard is used to assess ski durability, compare designs, and support R&D and quality control.

Key topics and technical requirements

• Measured properties
  • Bottom camber height (h): measured with a flat surface plate and dial indicator (accuracy ±0.03 mm).
  • Centre spring constant (cM): measured per ISO 5902 (accuracy ±0.2 N/mm).
• Apparatus
  • Bending machine with two adjustable supports (support spacing = nominal ski length − 280 mm) and support rolls ≈ 50 mm diameter.
  • Clamping fixture with elastic rubber jaws (4 mm ±1 mm thickness; 40 mm width; hardness (95 ± 5) Shore A).
  • Cycle counter on the push rod; measuring devices per ISO 5902 and a dial indicator for camber.
• Test parameters
  • Sample size: 10 skis of the same type.
  • Specified nominal ski lengths: 1 300 mm, 1 600 mm, 1 800 mm or 2 000 mm.
  • Test loads by length: 1 300 mm → 250 N; 1 600 mm → 350 N; 1 800 mm/2 000 mm → 450 N.
  • Stroke length s determined by s = F / cM (per original centre spring constant).
  • Cyclic loading: 20 000 cycles at 2–3 Hz.
  • Recovery time: 24 hours in a vertical, stress‑free position before final measurements.
• Temperatures
  • Laboratory (A): 23 °C ± 2 °C.
  • Cold chamber (B): −5 °C ± 2 °C.
• Results
  • Fatigue indices Kh and Kc are percentage changes in camber height and centre spring constant; report mean of 10 tests.
  • Visual inspection for damage (cracks, delamination, stress marks).
• Test report must reference ISO 6266 and include ski ID, test temperature, fatigue indices, observed damage, and deviations.

Applications and intended users

• Product development and R&D teams evaluating ski durability, stiffness retention, and design trade-offs.
• Quality assurance labs performing ski testing and batch comparisons.
• Manufacturers wanting standardized metrics for marketing claims or to comply with procurement/testing specifications.
• Research organizations studying material fatigue and performance under cyclic bending.

Related standards

• ISO 5902 - Alpine skis: determination of elastic properties (used for centre spring constant measurement).
• ISO 6289 - Skis: vocabulary (definitions such as camber height and nominal length).

Keywords: ISO 6266, alpine skis, fatigue indexes, cyclic loading test, camber height, centre spring constant, ski testing, bending machine, ski durability, material fatigue.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2017
1DGRPHãþD
SIST ISO 6266:1995
$OSVNHVPXþL'RORþHYDQMHXWUXMHQRVWL3UHVNXVVFLNOLþQLPREUHPHQMHYDQMHP
Alpine skis - Determination of fatigue indexes - Cyclic loading test
Skis alpins -- Détermination des indices de fatigue -- Essai en flexion alternée
Ta slovenski standard je istoveten z: ISO 6266:2013
ICS:
97.220.20 Oprema za zimske športe Winter sports equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 6266
Second edition
2013-03-01
Alpine skis — Determination of
fatigue indexes — Cyclic loading test
Skis alpins — Détermination des indices de fatigue — Essai en
flexion alternée
Reference number
©
ISO 2013
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
5.1 Bending machine . 2
5.2 Measuring device for bottom camber height . 4
5.3 Measuring device for centre spring constant . 4
6 Test specimens. 4
6.1 Lengths . 4
6.2 Number . 5
7 Temperatures for conditioning and testing . 5
8 Procedure. 5
8.1 Measurement of original bottom camber height, h .
B 5
8.2 Measurement of original centre spring constant, c .
M 5
8.3 Determination . 5
8.4 Measurement of final bottom camber height, h’ .
B 6
8.5 Measurement of final centre spring constant, c’ .
M 6
8.6 Assessment of damage . 6
9 Expression of results . 6
9.1 Fatigue index for bottom camber height . 6
9.2 Fatigue index for centre spring constant . 6
10 Test report . 7
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 6266 was prepared by Technical Committee ISO/TC 83, Sports and recreational equipment,
Subcommittee SC 4, Snowsports equipment.
This second edition cancels and replaces the first edition (ISO 6266:1980), which has been technically revised.
iv © ISO 2013 – All rights reserved

Introduction
Previous investigations showed that the fatigue of an alpine ski is not easy to describe. If one
understands by fatigue the remaining negative change of some characteristics of the ski, influencing the
performance of the ski, as a result of normal use, several tests would be necessary to determine exactly
the susceptibility of a ski to such changes. In addition, some factors may have substantial influence on
the results such as ski length, spring constant, test temperature, kind of vibration, frequency etc. lt was
therefore decided that a test method taking account of all these factors might be of some interest for ski
research but that it should not be proposed for standardization.
Instead of this, a simplified test of the fatigue behaviour of two important characteristics of the ski (i.e.
of camber height and centre spring constant) was proposed for standardization.
INTERNATIONAL STANDARD ISO 6
...

INTERNATIONAL ISO
STANDARD 6266
Second edition
2013-03-01
Alpine skis — Determination of
fatigue indexes — Cyclic loading test
Skis alpins — Détermination des indices de fatigue — Essai en
flexion alternée
Reference number
©
ISO 2013
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
5.1 Bending machine . 2
5.2 Measuring device for bottom camber height . 4
5.3 Measuring device for centre spring constant . 4
6 Test specimens. 4
6.1 Lengths . 4
6.2 Number . 5
7 Temperatures for conditioning and testing . 5
8 Procedure. 5
8.1 Measurement of original bottom camber height, h .
B 5
8.2 Measurement of original centre spring constant, c .
M 5
8.3 Determination . 5
8.4 Measurement of final bottom camber height, h’ .
B 6
8.5 Measurement of final centre spring constant, c’ .
M 6
8.6 Assessment of damage . 6
9 Expression of results . 6
9.1 Fatigue index for bottom camber height . 6
9.2 Fatigue index for centre spring constant . 6
10 Test report . 7
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 6266 was prepared by Technical Committee ISO/TC 83, Sports and recreational equipment,
Subcommittee SC 4, Snowsports equipment.
This second edition cancels and replaces the first edition (ISO 6266:1980), which has been technically revised.
iv © ISO 2013 – All rights reserved

Introduction
Previous investigations showed that the fatigue of an alpine ski is not easy to describe. If one
understands by fatigue the remaining negative change of some characteristics of the ski, influencing the
performance of the ski, as a result of normal use, several tests would be necessary to determine exactly
the susceptibility of a ski to such changes. In addition, some factors may have substantial influence on
the results such as ski length, spring constant, test temperature, kind of vibration, frequency etc. lt was
therefore decided that a test method taking account of all these factors might be of some interest for ski
research but that it should not be proposed for standardization.
Instead of this, a simplified test of the fatigue behaviour of two important characteristics of the ski (i.e.
of camber height and centre spring constant) was proposed for standardization.
INTERNATIONAL STANDARD ISO 6266:2013(E)
Alpine skis — Determination of fatigue indexes — Cyclic
loading test
1 Scope
This International Standard specifies a method for the determination of the fatigue indexes of alpine skis
(i.e. the resistance of the skis to changes in shape and of stiffness) after a bending test with cyclic loading.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its ap
...

NORME ISO
INTERNATIONALE 6266
Deuxième édition
2013-03-01
Skis alpins — Détermination des indices
de fatigue — Essai en flexion alternée
Alpine skis — Determination of fatigue indexes — Cyclic loading test
Numéro de référence
©
ISO 2013
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2013
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni utilisée
sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie, l’affichage sur
l’internet ou sur un Intranet, sans autorisation écrite préalable. Les demandes d’autorisation peuvent être adressées à l’ISO à
l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Publié en Suisse
ii © ISO 2013 – Tous droits réservés

Sommaire Page
Avant-propos .iv
Introduction .v
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Principe . 2
5 Appareillage . 2
5.1 Machine pour essai de flexion. 2
5.2 Dispositif de mesure du cambré . 4
5.3 Dispositif de mesure de la raideur globale en flexion . 4
6 Éprouvettes . 4
6.1 Longueurs. 4
6.2 Nombre . 5
7 Températures de conditionnement et d’essai . 5
8 Mode opératoire. 5
8.1 Mesurage de cambré initial, h .
B 5
8.2 Mesurage de la raideur globale en flexion initiale, c .
M 5
8.3 Détermination . 5
8.4 Mesurage du cambré final, h’ .
B 6
8.5 Mesurage de la raideur globale en flexion finale, c’ .
M 6
8.6 Évaluation des détériorations . 6
9 Expression des résultats. 6
9.1 Indice de fatigue du cambré . 6
9.2 Indice de fatigue de la raideur globale en flexion . 6
10 Rapport d’essai . 6
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes
nationaux de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est
en général confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l’ISO participent également aux travaux.
L’ISO collabore étroitement avec la Commission électrotechnique internationale (CEI) en ce qui concerne
la normalisation électrotechnique.
Les Normes internationales sont rédigées conformément aux règles données dans les Directives
ISO/CEI, Partie 2.
La tâche principale des comités techniques est d’élaborer les Normes internationales. Les projets de
Normes internationales adoptés par les comités techniques sont soumis aux comités membres pour vote.
Leur publication comme Normes internationales requiert l’approbation de 75 % au moins des comités
membres votants.
L’attention est appelée sur le fait que certains des éléments du présent document peuvent faire l’objet de
droits de propriété intellectuelle ou de droits analogues. L’ISO ne saurait être tenue pour responsable de
ne pas avoir identifié de tels droits de propriété et averti de leur existence.
L’ISO 6266 a été élaborée par le comité technique ISO/TC 83, Matériel de sports et d’activités de plein air,
sous-comité SC 4, Équipements de sport de neige.
Cette deuxième édition annule et remplace la première édition (ISO 6266:1980), qui a fait l’objet d’une
révision technique.
iv © ISO 2013 – Tous droits réservés

Introduction
Des recherches antérieures ont montré la difficulté de caractériser le phénomène de «fatigue» d’un ski
alpin. Si l’on entend par «fatigue» la modification permanente négative de certaines caractéristiques
du ski, qui influencent son comportement, à la suite d’un usage normal, il est nécessaire de réaliser
plusieurs essais pour déterminer avec certitude la sensibilité du ski à de telles modifications. De plus,
de nombreux facteurs peuvent avoir une influence importante sur les résultats, tels que la longueur du
ski, la raideur en flexion, la température d’essai, la nature des vibrations, la fréquence, etc. Il a donc été
décidé qu’une méthode d’essai, tenant compte de tous ces facteurs, présente un intérêt pour la recherche
relative aux skis, toutefois il convient de ne pas la présenter comme norme.
Au lieu de cela, un essai simplifié de comportement à la fatigue de deux caractéristiques importantes du
ski (c’est-à-dire cambré et raideur globale en flexion) a été présenté comme norme.
NORME INTERNATIONALE ISO 6266:2013(F)
Skis alpins — Détermination des indices de fatigue — Essai
en flexion alternée
1 Domaine d’application
La présente Norme internationale spécifie une méthode de détermination des indices de fatigue des
skis alpins (c’est-à-dire la résistance des skis aux modifications de forme et de raideur) après essai en
flexion alternée.
2 Références normatives
Les documents de référence suivants sont indispensables à l’application du présent document. Pour les
références datées, seule l’édition citée s’applique. Pour les références non datées, la dernière édition du
document de référen
...