Detail of GB/T 1040.5-2008

Introduction of GB/T 1040.5-2008

1 Scope 1.1 This part of GB/T 1040 specifies the test conditions for the determination of the tensile properties of unidirectional fibre-reinforced plastic composites, based upon part 1. 1.2 See GB/T 1040.1-2006, Section 1.2. 1.3 This part is suitable for all polymer matrix systems reinforced with unidirectional fibres and which meet the requirements, including failure mode, set out in this part of GB/T 1040. This part is suitable for composites with either thermoplastic or thermosetting matrices, including preimpregnated materials (prepregs). The reinforcements covered include carbon fibres, glass fibres, aramid fibres and other similar fibres. The reinforcement geometries covered include unidirectional (i.e. completely aligned) fibres and rovings and unidirectional fabrics and tapes. This part is not normally suitable for multidirectional materials composed of several unidirectional layers at different angles (see GB/T 1040.4-2006). 1.4 This part is performed using one of two different types of test specimen, depending on the direction of the applied stress relative to the fibre direction (see Chapter 6) 1.5 See GB/T 1040.1-2006, Section 1.5 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this part of GB/T 1040. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties who enter into agreement according to this standard are encouraged to study whether the latest editions of these documents apply. For undated references, the latest edition applies to this standard. GB/T 1040.1-2006 Plastics - Determination of Tensile Properties - Part 1: General Principles (ISO 527-1:1993, IDT) GB/T 1040.4-2006 Plastics - Determination of Tensile Properties - Part 4: Test Conditions for Isotropic and Orthotropic Fibre-reinforced Plastic Composites (ISO 527-4:1997, IDT) ISO 1268:1974 Plastics - Preparation of Glass Fibre Reinforced, Resin Bonded, Low-pressure Laminated Plates or Pane/s for Test Purposes ISO 2818:1994 Plastics - Preparation of Test Specimens by Machining ISO 3534-1:1993 Statistics - Vocabulary and Symbols - Part I: Probability and General Statistical Terms ISO 9291:1996 Textile-glass-reinforced Plastics - Rovings - Preparation of Unidirectional Panals by Winding 3 Principle See GB/T 1040.1-2006, Chapter 3. 4 Terms and Definitions

Contents of GB/T 1040.5-2008

Foreword i 1 Scope 2 Normative References 3 Principle 4 Terms and Definitions 5 Apparatus 6 Test Specimens 7 Number of specimens 8 Conditioning 9 Procedure 10 Calculation and Expression of Results 11 Precision 12 Test Report Annex A (Normative) Specimen Preparation Annex B (Informative) Alignment of Specimens