BS EN ISO 179-1:2010 pdf free download.Plastics – Determination of Charpy impact properties Part 1: Non-instrumented impact test (ISO 179-1:2010).
1.1 This part of ISO 179 specifies a method for determining the Charpy impact strength of plastics under defined conditions. A number of different types of specimen and test configurations are defined. Different test parameters are specified according to the type of material, the type of test specimen and the type of notch.
1.2 The method can be used to investigate the behaviour of specified types of specimen under the impact conditions defined and for estimating the brittleness or toughness of specimens within the limitations inherent in the test conditions. It can also be used for the determination of comparative data from similar types of material.
1.3 The method has a greater range of applicability than that given in ISO 18Oh] and is more suitable for the testing of materials showing interlaminar shear fracture or of materials exhibiting surface effects due to environmental factors.
1.4 The method is suitable for use with the following range of materials:
— rigid thermoplastic moulding and extrusion materials (including filled and reinforced compounds in addition to unfilled types) and rigid thernioplastics sheets:
rigid thermosetting moulding materials (including filled and reinforced compounds) and rigid thermosetting sheets (including laminates):
— fibre-reinforced therrnosetting and thermoplastic composites incorporating unidirectional or multi- directional reinforcements (such as mats, woven fabrics, woven rovings, chopped strands, combination and hybrid reinforcements, rovings and milled fibres) or incorporating sheets made from pre-impregnated materials (prepregs), including filled and reinforced compounds:
— thermotropic liquid-crystal polymers.
1.5 Notched samples are not normally suitable for use with rigid cellular materials, long-fibre-reinforced composites or thermotropic liquid-crystal polymers. In these cases, unnotched samples may be used.
1.6 The method is suited to the use of specimens moulded to the chosen dimensions, machined from the central portion of a standard multipurpose test specimen (see ISO 3167) or machined from finished or semifinished products such as mouldings, laminates and extruded or cast sheet.
1.7 The method specifies preferred dimensions for the test specimen. Tests which are carried out on specimens of different dimensions or with different notches, or specimens which are prepared under different conditions, might produce results which are not comparable. Other factors, such as the energy capacity of the apparatus, the impact velocity and the conditioning of the specimens can also influence the results. Consequently, when comparative data are required, these factors must be carefully controlled and recorded.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 291, Plastics — Standard atmospheres for conditioning and testing
ISO 293, Plastics — Compression moulding of test specimens of thermoplastic materials
ISO 294-1, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 1: General principles, and moulding of multipurpose and bar test specimens
ISO 294-3, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 3: Small plates ISO 295, Plastics — Compression moulding of test specimens of thermosetting materials
ISO 1268-11, Fibre-reinforced plastics — Methods of producing test plates — Part 11: Injection moulding of BMC and other long-fibre moulding compounds — Small plates
ISO 2602, Statistical interpretation of test results — Estimation of the mean — Confidence interval
ISO 2818, Plastics — Preparation of test specimens by machining
ISO 3167, Plastics — Multipurpose test specimens
ISO 10724-1, Plastics — Injection moulding of test specimens of thermosetting powder moulding compounds (PMCs) — Part 1: General principles and moulding of multipurpose test specimens
ISO 13802. Plastics — Verification of pendulum impact-testing machines — Charpy, Izod and tensile impact-testing
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
Charpy unnotched Impact strength
impact energy absorbed in breaking an unnotched specimen, referred to the original cross-sectional area of the specimen.BS EN ISO 179-1 pdf free download.
Tags: Plastics
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