OS-C501

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Offshore Standard DNV-OS-C501, November 2013 App.H Example for representative data – Unidirectional carbon tapes made of TPW tape with “5631” fibres – Page 244 Table H-1 Properties to define the material (Continued) A B C D Requirements to group measurements from different laminates Constituent materials: Tenax STS 5631 Tenax HTS 5631 Tenax HTS 5631 Tenax UTS 5631 1600tex 800tex 1600tex 800tex f24000 t0 f12000 t0 f24000 t0 f12000 t0 Processing method Autoclave cured Autoclave cured Autoclave cured Autoclave cured Processing temperature 140°C for 60 180°C for 20 180°C for 20 minutes 180°C for 20 minutes minutes minutes Processing pressure 4.0 bar 5.0 bar 5.0 bar 5.0 bar Process atmosphere (e.g. 0.99 bar 0.99 bar 0.99 bar 0.99 bar vacuum) Post curing (temperature none None none none and time) Control of fibre orientation --- --- --- --- Fibre volume fraction 58-60% 54.5-57.8% 54.5-57.8% 54.6-60% Void content 1.88 - 2.06% 0.79% 0.69% 1.3% Conditioning parameters: See sections for properties: H.3 Quasi static properties in air (QSA) H.3.1 Test environment H.3.1.1 The test environment is described according to Sec.4 [8.5.2]. H.3.1.2 The following properties are listed according to Sec.4 [2.2]. Characteristic values are calculated according to Sec.4 [2.4]. H.3.1.3 Data are based on a set of 6 measurements for each property, backed up by more than 50 measurements from production control. Table H-2 Conditioning parameters Temperature 23 °C Water content of the laminate (wet, dry) Dry Chemical environment Air Loading rate 1-2 mm / minute * number of specimens Reported individually for all properties * Rates varied slightly between test methods. Shear data were obtained from ±45 laminates tested at 2 mm/minute and sometimes at faster rates of about 6 mm/min after 2% strain. DET NORSKE VERITAS AS
Offshore Standard DNV-OS-C501, November 2013 App.H Example for representative data – Unidirectional carbon tapes made of TPW tape with “5631” fibres – Page 245 H.3.2 Fibre dominated ply properties Table H-3 Fibre dominated ply Properties A B C D Parameter (Unit) E 1 (UD ply) [GPa] ε ∧ 1t ε ∧ 1c 1t σ ∧ σ ∧ 1c N/mm 2 (MPa) H.3.3 Matrix dominated ply properties H.3.3.1 There are no representative data. H.3.4 Through thickness ply properties H.3.4.1 There are no representative data. H.4 Long term properties H.4.1 General Tenax STS 5631 1600tex f24000 t0 Tenax HTS 5631 800tex f12000 t0 Tenax HTS 5631 1600tex f24000 t0 Tenax UTS 5631 800tex f12000 t0 H.4.1.1 There are no representative long term data for service in air or water. Explanation Mean COV 145.2 (118.2) 2.21% (5.68%) 140.9 (114.2) 1.50% (3.53%) 143.4 (124.9) 1.81% (5.48%) 142.9 (120.8) 1.32% (2.69%) Modulus of elasticity in main fibre direction, in tension and (compression) Charact.value Same as mean Same as mean Same as mean Same as mean Mean 0.0167 0.0168 0.0170 0.0184 Tensioning strain at break in COV 2.58% 0.75% 2.35% 2.09% the main fibre direction. Characteristic value calculated Charact.value 0.0160 0.0160 0.0161 0.0178 from strength data. * for calculations Mean 0.0079 0.0084 0.0074 0.0099 Compressive strain at break in COV 9.77% 15.3% 9.21% 20.64% the main fibre direction. Characteristic value calculated Charact.value 0.0069 0.0061 0.0055 0.0064 from strength data. * for calculations Mean 2449 2394 2475 2652 Tension stress at break in the COV 2.64% 2.78% 3.33% 1.95% main fibre direction Charact.value 2320 2261 2310 2549 Mean 897 923 888 1145 Compressive stress at break in COV 4.52% 12.44% 11.34% 19.11% the main fibre direction Charact.value 816 693 687 776 N/mm 2 (MPa) * Characteristic strains to failure were calculated from the characteristic strength data allowing easy linear analysis. A higher strain to failure may be used if nonlinear effects are taken into account in the analysis, i.e., drop of Young's modulus. DET NORSKE VERITAS AS
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OS-C501

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