纤维增强塑料复合材料 面内方向压缩性能的测定

[中文适用范围]： 1.1 本文件规定了测定基于热固性或热塑性基质的纤维增强塑料复合材料在平行于层压平面方向上的压缩性能的方法。压缩性能对于规范和质量控制目的很重要。试样由平坦的试验板或合适的成品或半成品加工而成。1.2 描述了两种加载方法和两种类型的试样。加载方法为： — 方法 1：提供试样的剪切载荷（标距长度无支撑） — 方法 2：提供试样的组合载荷（标距长度无支撑） 注：对于使用方法 2 加载的带突出部试样，载荷通过突出部的端部载荷和剪切载荷的组合传递。样品设计为： - A 型样品：矩形横截面，固定厚度，端部有突出部分（主要用于航空式预浸渍材料（~ 0,125 mm 层厚度） - B 型样品：矩形横截面，厚度范围，无突出部分或端部有突出部分，有两种样品尺寸可供选择（B1 和 B2）。A 型样品用于在纤维方向测试的单向或双向增强材料，其中纤维通常连续排列或长排列（>7,5 mm）不连续。B1 型和 B2 型样品用于多向排列；垫子、织物和其他多向增强材料，其中纤维结构更复杂和/或更粗。1.3 本文件给出了检查试验方法和样品设计的组合是否导致有效失效的标准。需要注意的是，替代的试验方法/样品组合不一定会产生相同的结果。1.4 方法指定了样品所需的尺寸。对其他尺寸的样本或在不同条件下制备的样本进行的测试可能会产生不可比较的结果。其他因素（例如测试速度、使用的支撑装置和样本的条件）可能会影响结果。 [外文原描述]： This document specifies methods for determining the compressive properties, in directions parallel to the plane of lamination, of fibre-reinforced plastic composites, based on thermosetting or thermoplastic matrices. The compressive properties are of interest for specifications and quality-control purposes. The test specimens are machined from a flat test plate, or from suitable finished or semi-finished products. Two loading methods and two types of specimen are described. The loading methods are: — Method 1: provides shear loading of the specimen (gauge length unsupported) — Method 2: provides combined loading of the specimen (gauge length unsupported) NOTE For tabbed specimens loaded using method 2, load is transferred through a combination of end-loading and shear-loading through the tabs. The specimen designs are: — Type A specimen: rectangular cross-section, fixed thickness, end-tabbed (mainly for aerospace style preimpregnates (~ 0,125 mm ply thickness) — Type B specimen: rectangular cross-section, range of thicknesses, untabbed or end-tabbed, two specimen sizes are available (B1 and B2). The Type A specimen is used for unidirectionally or biaxially reinforced materials tested in the fibre direction, where the fibres are normally either aligned continuous or aligned long (>7,5 mm) discontinuous. The Type B1 and B2 specimens are used for multi-directional aligned; mat, fabric and other multi-directionally reinforced materials where the fibre structure is more complex and/or coarser. This document gives criteria for checking that the combination of test method and specimen design result in valid failures. It is noted that alternative test method/specimen combinations will not necessarily give the same result. The methods specify required dimensions for the specimen. Tests carried out on specimens of other dimensions, or on specimens that are prepared under different conditions, can produce results that are not comparable. Other factors, such as the speed of testing, the support fixture used and the conditioning of the specimens, can influence the results.