1.1 本试验方法描述了测量刚性粘附物之间粘合层的剪切模量和剪切强度的设备和程序。该设备还可用于确定粘合剂的剪切蠕变顺应性、应变历史（如循环载荷）对剪切性能的影响，以及双轴应力条件（如剪切+拉伸和剪切+压缩）的失效标准。 2. 1.2 高密度木材应为首选基材。可以测量的剪切模量的实际上限由粘附物的剪切模量和应变测量装置确定。因此，可使用高密度木材粘附物测量的粘合剂剪切模量的实际极限约为690 MPa（1 × 10 5. psi）。 注1: 木基复合材料、金属、塑料、增强塑料和其他常见建筑材料也可用于粘附物。 1.3 可测试的试样尺寸范围为:宽度1.59至12.70 mm（0.0625至0.500 in.），长度102至203毫米（4至8英寸），和粘附物厚度13至25毫米（0.50至1.00英寸）。标准试样尺寸应为:宽度3.18 mm（0.125 in.），长度203毫米（8英寸），和粘附物厚度19毫米（0.75英寸）。粘合线厚度为0.15至3.18 mm（0.006至0.125 in.）可以进行测试。 1.4 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.5 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、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 基于材料强度原理或弹性理论的结构设计需要了解结构部件（包括粘合剂）的机械性能。根据其使用性质，最重要的粘合性能是剪切模量和剪切强度。扭转试验，如试验方法中所述 E229年 是理论上测量粘合剂剪切性能最精确的方法。然而，在许多情况下，这是不切实际的。例如，某些结构材料不适合制造薄- 扭转试验中用作粘附物的有壁圆柱。改进后的钢轨试验没有这一缺点。 5.2 在改进的钢轨试样中出现了两种不理想的情况，而在对接连接的圆柱体中不会出现这种情况；沿着接缝的不均匀剪切应力分布，以及在接缝中给定位置的剪切应力中添加一些未定义的拉应力和压应力组合。改进的钢轨剪切工具将这些不良影响降至最低，但不能消除。 5.3 剪切模量、强度和其他性能通过改进的轨道法测量。

1.1 This test method describes equipment and procedures to measure the shear modulus and shear strength of adhesive layers between rigid adherends. The equipment may also be used for determining the adhesive’s shear creep compliance, the effects of strain history such as cyclic loading upon shear properties, and a failure criteria for biaxial stress conditions such as shear plus tension and shear plus compression. 2 1.2 High-density wood shall be the preferred substrate. The practical upper limit on the shear modulus that can be measured is determined by the shear modulus of the adherends and by the strain measuring device. Thus, the practical limit of adhesive shear modulus that can be measured using high-density wood adherends is about 690 MPa (1 × 10 5 psi). Note 1: Wood-base composites, metal, plastic, reinforced plastics, and other common construction materials may also be used for adherends. 1.3 The range of specimen dimensions that can be tested are: width 1.59 to 12.70 mm (0.0625 to 0.500 in.), length 102 to 203 mm (4 to 8 in.), and adherend thickness 13 to 25 mm (0.50 to 1.00 in.). The standard specimen dimensions shall be: width 3.18 mm (0.125 in.), length 203 mm (8 in.), and adherend thickness 19 mm (0.75 in.). Bondline thicknesses from 0.15 to 3.18 mm (0.006 to 0.125 in.) may be tested. 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Structural design based on strength of materials principles or the theory of elasticity requires knowledge of the mechanical properties of the structural components, including adhesives. By the nature of their use, the most important adhesive properties are shear modulus and shear strength. A torsion test, such as described in Test Method E229 , is theoretically the most accurate method for measuring adhesive shear properties. It is, however, impractical in many situations. For example, certain materials of construction are not readily adaptable to fabricating the thin-walled cylinders used as adherends in the torsion test. The modified-rail test does not have this disadvantage. 5.2 Two undesirable conditions occur in the modified-rail test specimens that do not occur in butt-joined cylinders; nonuniform shear-stress distribution along the joint, and the addition of some undefined combination of tension and compression stresses to the shear stress at a given location in the joint. The modified-rail shear tool minimizes but does not eliminate these undesirable effects. 5.3 Shear modulus, strength, and other properties are measured by the modified-rail method.