1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21821-8 SANS 12215-2:2008 Edition 1 ISO 12215-2:2002 Edition 1SOUTH AFRICAN NATIONAL STANDARD Small craft Hull construction and scantlings
4、 Part 2: Materials: Core materials for sandwich construction, embedded materials This national standard is the identical implementation of ISO 12215-2:2002, and is adopted with the permission of the International Organization for Standardization. Published by Standards South Africa 1 dr lategan road
5、 groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code +27 12 www.stansa.co.za Standards South Africa This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 12215-2:2008 Edition 1 ISO 12215-2:2002 Editio
6、n 1 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee StanSA TC 5120.74, Small craft, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published i
7、n July 2008. This standard may only be used and printed by approved subscription and freemailing clients of the SABS. Reference number ISO 12215-2:2002(E) ISO 2002INTERNATIONAL STANDARD ISO 12215-2 First edition 2002-05-01 Small craft Hull construction and scantlings Part 2: Materials: Core material
8、s for sandwich construction, embedded materials Petits navires Construction de coques et chantillons Partie 2: Matriaux: Matriaux dme pour les constructions de type sandwich, matriaux enrobs SANS 12215-2:2008This standard may only be used and printed by approved subscription and freemailing clients
9、of the SABS.ISO 12215-2:2002(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the edi
10、ting. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be
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12、 the address given below. ISO 2002 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address belo
13、w or ISOs 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 copyrightiso.ch Web www.iso.ch Printed in Switzerland ii ISO 2002 All rights reserved SANS 12215-2:2008This standard may only be used and
14、printed by approved subscription and freemailing clients of the SABS.ISO 12215-2:2002(E) ISO 2002 All rights reserved iiiContents Page Foreword.iv 1 Scope1 2 Normative references1 3 Sandwich core properties.2 4 Embedded materials inserts 3 5 Owners manual.3 Annex A (normative) Mechanical properties
15、of some sandwich core materials4 SANS 12215-2:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 12215-2:2002(E) iv ISO 2002 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of
16、 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. Int
17、ernational 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 t
18、he rules given in the ISO/IEC Directives, Part 3. 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
19、by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this part of ISO 12215 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 12215-2 was prepared by Technical
20、Committee ISO/TC 188, Small craft. ISO 12215 consists of the following parts, under the general title Small craft Hull construction and scantlings: Part 1: Materials: Thermosetting resins, glass-fibre reinforcement, reference laminate Part 2: Materials: Core materials for sandwich construction, embe
21、dded materials Part 3: Materials: Steel, aluminium alloys, wood, other materials Part 4: Workshop and manufacturing Part 5: Design pressures, design stresses, scantling determination Part 6: Structural arrangements and details Annex A forms a normative part of this part of ISO 12215. SANS 12215-2:20
22、08This standard may only be used and printed by approved subscription and freemailing clients of the SABS.INTERNATIONAL STANDARD ISO 12215-2:2002(E) ISO 2002 All rights reserved 1Small craft Hull construction and scantlings Part 2: Materials: Core materials for sandwich construction, embedded materi
23、als 1 Scope This part of ISO 12215 specifies requirements for core materials for structural use and materials that are embedded in sandwich construction. It is applicable to small craft with a hull length (L H ) according to ISO 8666 of up to 24 m. NOTE The underlying reason for preparing this part
24、of ISO 12215 is that sandwich structures of small craft require careful selection of core materials from a multitude of choices, and that the manufacturing has to follow certain procedures to achieve the intended long-term durability under the expected loads and environmental conditions. 2 Normative
25、 references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO 12215. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on th
26、is part of ISO 12215 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid I
27、nternational Standards. ISO 844:2001, Rigid cellular plastics Determination of compression properties ISO 845:1988, Cellular plastics and rubbers Determination of apparent (bulk) density ISO 1922:2001, Rigid cellular plastics Determination of shear strength ISO 1926: 1), Cellular plastics Determinat
28、ion of tensile properties of rigid materials ISO 2896:2001, Rigid cellular plastics Determination of water absorption ISO 3131:1975, Wood Determination of density for physical and mechanical tests ISO 3132:1975, Wood Testing in compression perpendicular to grain ISO 3345:1975, Wood Determination of
29、ultimate tensile stress parallel to grain ISO 3346:1975, Wood Determination of ultimate tensile stress perpendicular to grain ISO 4589 (all parts):1996, Plastics Determination of burning behaviour by oxygen index 1) To be published. (Revision of ISO 1926:1979) SANS 12215-2:2008This standard may only
30、 be used and printed by approved subscription and freemailing clients of the SABS.ISO 12215-2:2002(E) 2 ISO 2002 All rights reserved ISO 8666: 2 ) , Small craft Principal data ISO 12215-5: 2) , Small craft Hull construction and scantlings Part 5: Design pressures, design stresses, scantling determin
31、ation ASTM C365:2000, Standard test method for flatwise compressive properties of sandwich cores 3 Sandwich core properties 3.1 Sandwich structure A sandwich structure is a composite composed of lightweight core material to which two relatively thin, dense and high-strength functional laminate skins
32、 are adhered. 3.2 Structural requirements 3.2.1 Core materials for sandwich construction of small craft shall only be used if the following requirements of the final structure are fulfilled. The material shall have adequate properties to enable the sandwich structure to fulfil the requirements speci
33、fied in ISO 12215-5 for a normal service life in a marine environment, with special regard to in-plane forces, acting in the direction of the sandwich layers, e.g. tension, compression, shear; out-of-plane forces, acting transversely to the sandwich layers, e.g. compression, tension, shear. 3.2.2 Fa
34、tigue performance must be considered when choosing the core material. 3.3 Material requirements, general 3.3.1 Core materials shall have stable mechanical properties consistent with the designated use of the craft. 3.3.2 Resin applied to the core material or its protective sheathing/coating shall be
35、 compatible with its surface. 3.3.3 Core materials forming part of a sandwich structure shall limit the penetration of water beyond the area of a possible fracture of the skin laminate. This requirement does not apply for core materials that consist of a three-dimensional open structure bonded to bo
36、th skin laminates, e.g. honeycomb or three-dimensional fabrics. not emit significant amounts of gases that would compromise the bond or laminate. 3.3.4 Core materials shall be capable of transferring the shear loads specified in ISO 12215-5. 3.3.5 The core material manufacturer shall provide written
37、 information on the mechanical and other properties relevant for the intended application, as well as their variation in temperature and thermal limit of application where relevant. The boat manufacturer shall keep the information with the technical documentation established for the boat. 2 )To be p
38、ublished SANS 12215-2:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 12215-2:2002(E) ISO 2002 All rights reserved 33.4 Material requirements, specific 3.4.1 Expanded foam 3.4.1.1 Expanded foam plastics used in structural sandwich cores
39、 of the craft shall be of a closed cell type. 3.4.1.2 The mechanical properties of PVC (polyvinyl chloride) and SAN (styrene acrylic nitrile) type foam cores, intended to be used in the structural laminate of hull, deck and first tier of the superstructure, if this is open to the atmosphere, shall a
40、t least comply with the properties of Grade I of Table A.1. 3.4.1.3 The mechanical properties as delivered, intended to be used for other parts of the craft, shall comply at least with the properties of Grade II of Table A.1. 3.4.2 End-grain balsa 3.4.2.1 Where used as a structural core material of
41、the hull, end-grain balsa wood shall fulfil the following requirements. It shall be free from living organisms that may cause degradation when enclosed in a boat structure sandwich panel; have been homogenized; have an average moisture content of 12 % to 15 %, when packaged. 3.4.2.2 The mechanical p
42、roperties as delivered shall comply with Grade I or II of Table A.2. 3.4.3 Other core materials Core materials other than those given in 3.4.1 and 3.4.2 may be used if they fulfil the requirements of 3.2 and 3.3. 4 Embedded materials inserts 4.1 General requirements The properties of expansion and c
43、ontraction of inserts shall be similar to those of the laminate so that the overall performance of the structural laminate is not impaired. 4.2 Specific requirements Embedded plywood shall be of the waterproof and boilproof type and shall have a surface that bonds easily to the resin or adhesive. So
44、lid timber inserts between layers of laminate are not recommended. 5 Owners manual Where the core material used for structural parts may limit the mechanical properties of the sandwich panel due to extreme thermal conditions, the temperature range for safe operation of the craft shall be stated in t
45、he owners manual. SANS 12215-2:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.ISO 12215-2:2002(E) 4 ISO 2002 All rights reserved Annex A (normative) Mechanical properties of some sandwich core materials Tables A.1 and A.2 give the minimum
46、mechanical properties of foam core materials and end-grain balsa wood, respectively. Table A.1 Minimum mechanical properties of foam core materials as delivered Required minimum values Property Standard, test method Grade I Grade II Unit Tensile strength ISO 1926 a, b1,0 0,6 N/mm 2Tensile modulus IS
47、O 1926 60 30 N/mm 2Compressive strength ISO 844 a, b, c , 23 C 1,0 0,6 N/mm 2Compressive modulus ISO 844 a, b, c , 23 C 40 40 N/mm 2Compressive strength ISO 844 a,b,c , 45 C 60 % of value obtained at 23 C 50 % of value obtained at 23 C N/mm 2Compressive modulus ISO 844 a,b,c , 45 C 70 % of value obt
48、ained at 23 C 50 % of value obtained at 23 C N/mm 2Shear strength dISO 1922 0,6 0,4 N/mm 2Shear modulus dISO 1922 18 9 N/mm 2Shear elongation eISO 1922 Manufacturers specified min. value Manufacturers specified min. value Water absorption ISO 2896, 40 C,1 week, in water 1,5 max. 1,5 max. % (V/V) Wat
49、er resistance Percentage retention of compressive and tensile strength after 4 weeks in water (ISO 2896) at 23 C 75 70 % Density ISO 845 Manufacturers specified min. value Manufacturers specified min. value kg/m 3Oxygen index ISO 4589 Stated value Stated value NOTEThe minimum values shall be met by all specimens. aMaximum speed of deformation, mm/min: 10 % of the measured initial thickness. bDimensions of specimen: 50 mm 50 mm product thickness in m
