CEN/TR 17603-32-02:2022

SLOVENSKI STANDARD
01-marec-2022
Vesoljska tehnika - Priročnik o strukturnih materialih - 2. del: Metode za izračun
zasnove in splošni vidiki zasnove
Space engineering - Structural materials handbook - Part 2: Design calculation methods
and general design aspects
Raumfahrttechnik - Handbuch Konstruktionswerkstoffe - Teil 2:
Konstruktionsberechnungsverfahren und allgemeine Konstruktionsaspekte
Ingénierie spatiale - Manuel des matériaux structuraux - Partie 2 : Méthodes de calculs
de conception et aspects généraux de conception
Ta slovenski standard je istoveten z: CEN/TR 17603-32-02:2022
ICS:
49.140 Vesoljski sistemi in operacije Space systems and
operations
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL REPORT CEN/TR 17603-32-02

RAPPORT TECHNIQUE
TECHNISCHER BERICHT
January 2022
ICS 49.140
English version
Space engineering - Structural materials handbook - Part
2: Design calculation methods and general design aspects
Ingénierie spatiale - Manuel des matériaux structuraux Raumfahrttechnik - Handbuch
- Partie 2 : Méthodes de calculs de conception et Konstruktionswerkstoffe - Teil 2:
aspects généraux de conception Konstruktionsberechnungsverfahren und allgemeine
Konstruktionsaspekte
This Technical Report was approved by CEN on 22 November 2021. It has been drawn up by the Technical Committee
CEN/CLC/JTC 5.
CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium,
Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia,
Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

CEN-CENELEC Management Centre:
Rue de la Science 23, B-1040 Brussels
© 2022 CEN/CENELEC All rights of exploitation in any form and by any means Ref. No. CEN/TR 17603-32-02:2022 E
reserved worldwide for CEN national Members and for
CENELEC Members.
Table of contents
European Foreword . 25
Introduction . 26
10 Stress-strain relationships . 27
10.1 Introduction . 27
10.2 Elastic property prediction for UD ply from constituent properties. 27
10.3 Analytical notation for elastic constant methods . 29
10.4 Calculation methods for elastic constants of UD ply . 29
10.5 Longitudinal modulus . 31
10.6 Longitudinal Poisson's ratio . 33
10.7 Transverse modulus . 34
10.7.1 General . 34
10.7.2 Jones method . 34
10.7.3 Förster/Knappe method . 34
10.7.4 Schneider method . 35
10.7.5 Puck method . 35
10.7.6 Tsai method . 35
10.7.7 HSB method. 36
10.7.8 Graphs . 36
10.8 Transverse Poisson's ratio . 39
10.9 Transverse shear modulus . 39
10.9.1 General . 39
10.9.2 Jones method . 39
10.9.3 Förster/Knappe method . 39
10.9.4 Schneider method . 39
10.9.5 Puck method . 40
10.9.6 Tsai method . 40
10.9.7 HSB method. 40
10.9.8 Graphs . 41
10.10 In-plane stress calculation methods . 43
10.11 Analytical notation for in-plane methods . 43
10.12 Stress-strain relations for unidirectional plies . 45
10.12.1 Fibre-oriented co-ordinate system . 45
10.13 On axis stress strain relations . 45
10.13.1 General . 45
10.13.2 Compliance matrix . 46
10.13.3 Modulus matrix . 46
10.13.4 Symmetry of compliance and modulus matrices . 46
10.14 Stress-strain relations for a ply of arbitrary orientation . 46
10.14.1 General . 46
10.14.2 Off axis stiffness of a unidirectional ply. 48
10.15 Stiffness matrix for a laminate . 49
10.15.1 General laminates . 49
10.15.2 Symmetric laminates . 51
10.15.3 Flow chart . 52
10.16 Calculation methods with interlaminar stresses and strains . 53
10.16.1 Calculation with free-edge stresses . 53
10.17 Qualitative evaluation of interlaminar strength for design purposes . 55
10.17.1 General . 55
10.17.2 Variation of fibre direction within a [±φ°, 0°, ±φ°] laminate . 57
10.17.3 Variation of the thickness of the 0° layer within the [± 30°, 0n°, ± 30°]
laminate . 57
10.17.4 Variation of the sequence of layers . 58
10.18 References . 58
10.18.1 General . 58
11 Strength prediction and failure criteria . 60
11.1 Introduction . 60
11.1.1 Micro-mechanical strength models . 60
11.1.2 Lamina failure models . 60
11.1.3 Failure criteria studies . 61
11.1.4 Summary of World Wide Failure Exercise (WWFE) . 62
11.2 Tensile strength of UD composites in fibre direction . 64
11.2.1 General . 64
11.2.2 Weakest-link failure model . 64
11.2.3 Cumulative weakening failure model . 64
11.2.4 Fibre break propagation model . 66
11.2.5 Cumulative group mode failure model . 66
11.2.6 Status of models . 66
11.3 Compressive strength of UD composites in fibre direction. 66
11.3.1 General . 66
11.3.2 Extension mode buckling . 67
11.3.3 Shear mode buckling . 67
11.3.4 Analysis of compression failure . 68
11.4 Transverse tensile strength of UD composites . 70
11.4.1 General . 70
11.4.2 Prediction of transverse tensile strength . 71
11.4.3 Empirical analysis . 71
11.5 Static strength criteria for composites . 72
11.6 Analytical notation for static strength criteria for composites . 72
11.6.1 Co-ordinate system . 72
11.6.2 Formulae . 73
11.7 Different types of failure criteria . 74
11.7.1 General . 74
11.7.2 Evaluation studies . 75
11.8 Overview - Failure criteria . 75
11.8.1 Introduction . 75
11.8.2 Independent conditions . 76
11.8.3 Interactive conditions – Pure interpolative conditions . 77
11.8.4 Interactive conditions - Physical considerations . 78
11.9 Comparison between test data and various failure criteria . 87
11.9.1 Effects on failure mode . 87
11.10 Description of failure modes . 91
11.10.1 Laminates . 91
11.10.2 Failure . 91
11.11 Fatigue strength of composites . 96
11.11.1 Background . 96
11.11.2 Analytical notation . 97
11.11.3 Approximation of fatigue life . 97
11.12 References . 99
11.12.1 General . 99
12 Calculation of thermal stress and displacement . 103
12.1 Introduction . 103
12.1.1 General . 103
12.1.2 Longitudinal CTE . 103
12.1.3 Transverse CTE . 103
12.2 Analytical notation for thermal stress calculations . 104
12.3 Calculation of CTE from constituents .
...