OS-C501

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Offshore Standard DNV-OS-C501, November 2013 Contents – Page 14 G.1 General ................................................................................................................................................... 240 G.2 Definition of material............................................................................................................................. 240 G.3 Quasi static properties in air (QSA) ....................................................................................................... 241 G.4 Long term properties ............................................................................................................................. 242 App. H Example for representative data – Unidirectional carbon tapes made of TPW tape with “5631” fibres......................................................................................... 243 H.1 General ................................................................................................................................................... 243 H.2 Definition of material............................................................................................................................. 243 H.3 Quasi static properties in air (QSA) ....................................................................................................... 244 H.4 Long term properties ............................................................................................................................. 245 App. I Example for representative data unidirectional carbon tape TPW 0434 Prepreg ........................................................... 246 I.1 General ................................................................................................................................................... 246 I.2 Definition of material............................................................................................................................. 246 I.3 Quasi static properties in air (QSA) ....................................................................................................... 247 I.4 Long term properties .............................................................................................................................. 248 App. J Method of estimation of characteristic strength .......................................................... 249 CHANGES – HISTORIC ............................................................................................................... 250 DET NORSKE VERITAS AS
Offshore Standard DNV-OS-C501, November 2013 Sec.1 General – Page 15 SECTION 1 GENERAL 1 Objectives 1.1 Objectives 1.1.1 The main objectives of this standard is to: — serve as a basic philosophy and standard — provide an internationally acceptable standard for safe design with respect to strength and performance by defining minimum requirements for design, materials, fabrication and installation of load-carrying Fibre Reinforced Plastic (FRP) laminates and sandwich structures and components — serve as a technical reference document in contractual matters between client and contractor and or supplier — provide cost-effective solutions based on complete limit state design with reliability based calibration of safety factors — reflect the state-of-the-art and consensus on accepted industry practice — to provide guidance and requirements for efficient global analyses and introduce a consistent link between design checks (failure modes), load conditions and load effect assessment in the course of the global analyses. 2 Application - scope 2.1 General 2.1.1 This standard provides requirements and recommendations for structural design and structural analysis procedures for composite components. Emphasis with respect to loads and environmental conditions is put on applications in the offshore and processing industry. The materials description and calculation methods can be applied to any applications. Aspects related to documentation, verification, inspection, materials, fabrication, testing and quality control are also addressed. 2.1.2 The standard is applicable to all products and parts made of composite material and may be applied to modifications, operation and upgrading made to existing ones. It is intended to serve as a common reference for designers, manufacturers and end-users, thereby reducing the need for company specifications. 2.1.3 This standard assumes that material properties such as strength and stiffness are normally distributed. If the properties of a material deviate significantly from the assumption of a normal distribution, a different set of safety factors than specified herein has to be used. 2.1.4 All properties shall be estimated with 95% confidence except where noted. Guidance note: Different confidence levels are specified some places in this standard in order to ensure a uniform level of reliability. ---e-n-d---of---G-u-i-d-a-n-c-e---n-o-t-e--- 3 How to use the standard 3.1 Users of the standard 3.1.1 The client is understood to be the party ultimately responsible for the system as installed and its intended use in accordance with the prevailing laws, statutory rules and regulations. 3.1.2 The authorities are the national or international regulatory bodies. 3.1.3 The contractor is understood to be the party contracted by the client to perform all or part of the necessary work needed to bring the system to an installed and operable condition. 3.1.4 The designer is understood to be the party contracted by the contractor to fulfil all or part of the activities associated with the design. 3.1.5 The manufacturer is understood to be the party contracted by the contractor to manufacture all or part of the system. Two types of manufacturers can be distinguished: the material manufacturers, which supply the composite material or its constituents (i.e. resin, fibres) and the product manufacturers, which fabricate all or part of the system. 3.1.6 The third party verifier is an independent neutral party that verifies the design of a structure or component. DET NORSKE VERITAS AS
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OS-C501

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