ISO 527-1:2012 pdf free download.Plastics — Determination of tensile properties — Part 1: General principles.ISO 527-1:2012 specifies the general principles for determining the tensile properties of plastics and plastic composites under defined conditions. Several different types of test specimen are defined to suit different types of material which are detailed in subsequent parts of ISO 527.
The methods are used to investigate the tensile behaviour of the test specimens and for determining the tensile strength, tensile modulus and other aspects of the tensile stress/strain relationship under the conditions defined.
2 Normative references
ISO 291, Plastics – Standard atmospheres for conditioning and testing;
ISO 2602, Statistica interpretation of test results-Estimation of the mean- Confidence interval;
ISO 7500-1: 2004, Metallic materials – Verification of static uniaxial testing machines-Part 1:Tension/compression testing machines-Verification and calibration of the force-measuring system;
ISO 9513: 1999, Metallic materials-Calibration of extensometers used in uniaxial testing;
ISO 16012, Plastics-Determination of linear dimensions of test specimens;
ISO 20753, Plastics- Test specimens;
ISO 23529, Rubber-General procedures for preparing and conditioning test pieces for physical test methods;
4 Principle and methods
4.1 Principle
The test specimen is extended along its major longitudinal axis at a constant speed until the specimen fractures or until the stress(load ) or the strain (elongation)reaches some predetermined value. During this procedure the load sustained by the specimen and the elongation are measured.
4.2 Method
4.2.1 The methods are applied using specimens which may be either moulded to the chosen dimensions or machined, cut or punched from finished and semi-finished products, such as mouldings, laminates, films and extruded or cast sheet. The types of test specimen and their preparation are described in the relevant part of ISO 527 typical for the material. In some cases, a multipurpose test specimen may be used. Multipurpose and miniaturized test specimens are described in ISO 20753.
4.2.2 The methods specify preferred dimensions for the test specimens. Tests which are carried out on specimens of different dimensions, or on specimens which are prepared under different conditions, may produce results which are not comparable. Other factors, such as the speed of testing and the conditioning of e specimens, can also influence the results. onsequently, when comparative data are required, these factors shall be carefully controlled and recorded.