1.1 本试验方法描述了一种测定拉挤玻璃纤维增强热固性塑料棒拉伸财产的程序，其直径为2.03 mm（0.08 in.）至12.7 mm（0.5 in.）。试验方法 D7205/D7205米 是测定直径大于12.7 mm（0.5 in.）的纤维增强复合材料杆的拉伸财产的替代试验方法。 1.2 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 具体危害说明见 6.1 和 8.4.3 . 注1: 没有已知的ISO等同于本标准。 1.4 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 4.1 拉挤棒的高轴向拉伸强度和低横向压缩强度结合在一起，在用常规测试夹具确定这种材料的拉伸强度时，出现了一些独特的问题。在传统夹紧方法中产生的高横向压缩力倾向于挤压杆，从而导致过早失效。 在该测试方法中，与杆的形状相吻合的铝合金凸片减少了施加到杆上的压缩力，从而克服了传统测试夹具的有害影响。 4.2 拉伸财产受试样制备、应变率、热历史和测试时的环境条件的影响。因此，如果需要精确的比较结果，必须仔细控制这些因素。 4.3 拉伸财产为许多工程设计目的提供了有用的数据。然而，由于这些财产对应变率、温度和其他环境条件的高度敏感性，对于涉及与试验条件相差很大的载荷-时间尺度或环境条件的应用，不应单独考虑通过本试验方法获得的数据。 如果这种差异很明显，应在预期服务要求规定的广泛条件下确定应变率敏感性，包括冲击和蠕变以及环境敏感性。

1.1 This test method describes a procedure for determining the tensile properties of a pultruded, glass-fiber-reinforced thermosetting plastic rod of diameters ranging from 2.03 mm (0.08 in.) to 12.7 mm (0.5 in.). Test Method D7205/D7205M is an alternative test method to determine tensile properties of fiber-reinforced composite rods of diameters bigger than 12.7 mm (0.5 in.). 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 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. Specific hazards statements are given in 6.1 and 8.4.3 . Note 1: There is no known ISO equivalent to this standard. 1.4 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 ====== 4.1 The high axial-tensile strength and the low transverse-compressive strength of pultruded rod combine to present some unique problems in determining the tensile strength of this material with conventional test grips. The high transverse-compressive forces generated in the conventional method of gripping tend to crush the rod, thereby causing premature failure. In this test method, aluminum-alloy tabs contoured to the shape of the rod reduce the compressive forces imparted to the rod, thus overcoming the deleterious influence of conventional test grips. 4.2 Tensile properties are influenced by specimen preparation, strain rate, thermal history, and environmental conditions at the time of testing. Consequently, where precise comparative results are desired, these factors must be carefully controlled. 4.3 Tensile properties provide useful data for many engineering design purposes. However, due to the high sensitivity of these properties to strain rate, temperature, and other environmental conditions, data obtained by this test method shall not, by themselves, be considered for applications involving load-time scales or environmental conditions that differ widely from the test conditions. In cases where such dissimilarities are apparent, the sensitivities to strain rate, including impact and creep, as well as to the environment, shall be determined over a wide range of conditions as dictated by the anticipated service requirements.