1.1 本试验方法包括测定具有复合面板的平面夹层结构的表观面内剪切强度和刚度特性。允许的芯材形式包括具有连续粘合表面的芯材（如软木和泡沫）以及具有不连续粘合表面的芯材（如蜂窝）。 1.2 带有角切口的方形试样沿每个边缘机械固定在固定的金属框架上。框架承受单轴拉力，该拉力在与施加拉力成45°角的框架构件中产生拉力。这些拉力沿试样边缘作用，形成以剪切应力为主的状态，将施加的力传递给试样。程序A使用不带边缘倍增器的试样；程序B使用具有四个离散边缘倍增器的样本；程序C使用带有连续边缘倍增器的试样。 1.3 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.3.1 在文本中，英寸-磅单位显示在括号中。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 5.1 可以对平面夹层结构进行平面内剪切载荷试验，以确定夹层板的平面内剪切刚度、面板的平面内强度、核心剪切失稳强度或面板屈曲响应。 5.2 该测试方法可用于生成结构设计允许值、材料规范和研发应用的面板强度数据；它也可以用作粘合夹芯板的质量控制测试。 5.3 因此，应报告的影响面板强度的因素包括:面板材料、芯材、粘合材料、材料制造方法、面板堆叠顺序和总厚度、芯几何形状（单元尺寸）、芯剪切和抗压强度、芯剪切和抗压刚度、粘合厚度、试样几何形状、试样制备、，试样调节、试验环境、试样对齐、加载程序、试验速度、面板空隙率、粘合剂空隙率和面板体积钢筋百分比。此外，预固化/粘结和co之间的面板强度可能不同- 相同材料的固化面板。

1.1 This test method covers determination of apparent in-plane shear strength and stiffness properties of flat sandwich constructions with composite face sheets. Permissible core material forms include those with continuous bonding surfaces (such as balsa wood and foams) as well as those with discontinuous bonding surfaces (such as honeycomb). 1.2 The square test specimen with corner notches is mechanically fastened to a pinned metal frame along each edge. The frame is loaded in uni-axial tension which produces tensile forces in the frame elements at a 45° angle to the applied tension. These tensile forces act along the edges of the specimen to cause a state of predominately shear stress to transfer the applied force through the specimen. Procedure A uses a specimen without edge doublers; Procedure B uses a specimen with four discrete edge doublers; Procedure C uses a specimen with a continuous edge doubler. 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.3.1 Within the text the inch-pound units are shown in brackets. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 5.1 In-plane shear loading tests on flat sandwich constructions may be conducted to determine the sandwich panel in-plane shear stiffness, the face sheets’ in-plane strength, the core shear instability strength, or panel buckling response. 5.2 This test method can be used to produce face sheet strength data for structural design allowables, material specifications, and research and development applications; it may also be used as a quality control test for bonded sandwich panels. 5.3 Factors that influence the panel strength and shall therefore be reported include the following: face sheet material, core material, adhesive material, methods of material fabrication, face sheet stacking sequence and overall thickness, core geometry (cell size), core shear and compressive strength, core shear and compressive stiffness, adhesive thickness, specimen geometry, specimen preparation, specimen conditioning, environment of testing, specimen alignment, loading procedure, speed of testing, face sheet void content, adhesive void content, and face sheet volume percent reinforcement. Further, face sheet strength may be different between precured/bonded and co-cured face sheets of the same material.