标准编号：ISO 179-1:2010
中文名称：塑料 摆式冲击特性的测定 第1部分：非仪器冲击试验
英文名称：Plastics — Determination of Charpy impact properties — Part 1: Non-instrumented impact test
发布日期：2010-06
标准范围
1.1 This part of ISO 179 specifies a method for determining the Charpy impact strength of plastics underdefined conditions. A number of different types of specimen and test configurations are defined. Different testparameters 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 impactconditions defined and for estimating the brittleness or toughness of specimens within the limitations inherentin the test conditions. It can also be used for the determination of comparative data from similar types ofmaterial.1.3 The method has a greater range of applicability than that given in ISO 180[1] and is more suitable forthe testing of materials showing interlaminar shear fracture or of materials exhibiting surface effects due toenvironmental 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 inaddition to unfilled types) and rigid thermoplastics sheets;? rigid thermosetting moulding materials (including filled and reinforced compounds) and rigid thermosettingsheets (including laminates);? fibre-reinforced thermosetting and thermoplastic composites incorporating unidirectional or multidirectionalreinforcements (such as mats, woven fabrics, woven rovings, chopped strands, combinationand hybrid reinforcements, rovings and milled fibres) or incorporating sheets made from pre-impregnatedmaterials (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-reinforcedcomposites 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 thecentral portion of a standard multipurpose test specimen (see ISO 3167) or machined from finished orsemifinished 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 onspecimens of different dimensions or with different notches, or specimens which are prepared under differentconditions, might produce results which are not comparable. Other factors, such as the energy capacity of theapparatus, 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.1.8 The method should not be used as a source of data for design calculations. Information on the typicalbehaviour of a material can be obtained, however, by testing at different temperatures, by varying the notchradius and/or the specimen thickness and by testing specimens prepared under different conditions.
立即下载标准文件