标准摘要
[中文适用范围]： 本文件规定了在特定条件下测定刚性和半刚性塑料弯曲性能的方法。定义了首选的测试试样，但也包含了适用于其他尺寸试样的参数。包括一系列测试速度范围。该方法用于研究测试试样的弯曲行为，并测定在特定条件下的弯曲强度、弯曲模量以及弯曲应力/应变关系的其他方面。适用于自由支撑梁，在中跨加载（三点加载测试）。该方法适用于以下材料范围：热塑性成型、挤出和铸造材料，包括填充和增强化合物以及未填充类型；刚性热塑性板；热固性成型材料，包括填充和增强化合物；热固性板。与ISO 10350-1和ISO 10350-2一致，本文件适用于纤维长度≤7.5 mm的纤维增强化合物。对于纤维长度>7.5 mm的长纤维增强材料（层压板），参见ISO 14125。该方法通常不适用于刚性泡沫材料或含有泡沫材料的夹层结构。在这种情况下，可以使用ISO 1209-1和/或ISO 1209-2。 [外文原描述]： This document specifies a method for determining the flexural properties of rigid and semi-rigid plastics under defined conditions. A preferred test specimen is defined, but parameters are included for alternative specimen sizes for use where appropriate. A range of test speeds is included. The method is used to investigate the flexural behaviour of the test specimens and to determine the flexural strength, flexural modulus and other aspects of the flexural stress/strain relationship under the conditions defined. It applies to a freely supported beam, loaded at midspan (three-point loading test). The method is suitable for use with the following range of materials: — thermoplastic moulding, extrusion and casting materials, including filled and reinforced compounds in addition to unfilled types; rigid thermoplastics sheets; — thermosetting moulding materials, including filled and reinforced compounds; thermosetting sheets. In agreement with ISO 10350-1[5] and ISO 10350-2[6], this document applies to fibre-reinforced compounds with fibre lengths ≤7,5 mm prior to processing. For long-fibre-reinforced materials (laminates) with fibre lengths >7,5 mm, see ISO 14125[7]. The method is not normally suitable for use with rigid cellular materials or sandwich structures containing cellular material. In such cases, ISO 1209-1[3] and/or ISO 1209-2[4] can be used. NOTE 1 For certain types of textile-fibre-reinforced plastic, a four-point bending test is used. This is described in ISO 14125. The method is performed using specimens which can be either moulded to the specified dimensions, machined from the central section of a standard multipurpose test specimen (see ISO 20753) or machined from finished or semi-finished products, such as mouldings, laminates, or extruded or cast sheet. The method specifies the preferred dimensions for the test specimen. Tests which are carried out on specimens of different dimensions, or on specimens which are prepared under different conditions, can produce results which are not comparable. Other factors, such as the test speed and the conditioning of the specimens, can also influence the results. NOTE 2 Especially for injection moulded semi-crystalline polymers, the thickness of the oriented skin layer, which is dependent on the moulding conditions, also affects the flexural properties. The method is not suitable for the determination of design parameters but can be used in materials testing and as a quality control test.
英文名称Plastics — Determination of flexural properties