ASTM D5961/D5961M-17
聚合物基復(fù)合層壓制品軸承響應(yīng)的標(biāo)準(zhǔn)試驗(yàn)方法

Standard Test Method for Bearing Response of Polymer Matrix Composite Laminates

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ASTM D5961/D5961M-17

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2017年

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31頁

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美國材料與試驗(yàn)協(xié)會

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ASTM D5961/D5961M-23

當(dāng)前最新

ASTM D5961/D5961M-23

 

 

引用標(biāo)準(zhǔn)

ASTM D2584 ASTM D2734 ASTM D3171 ASTM D3410/D3410M ASTM D3878 ASTM D5229/D5229M ASTM D5687/D5687M ASTM D7248/D7248M ASTM D792 ASTM D883 ASTM D953 ASTM E122 ASTM E1309 ASTM E1434 ASTM E1471 ASTM E177 ASTM E238 ASTM E4 ASTM E456 ASTM E6 ASTM E691 ASTM E83

適用范圍

5.1 This test method is designed to produce bearing response data for material specifications, research and development, quality assurance, and structural design and analysis. The standard configuration for each procedure is very specific and is intended primarily for development of quantitative double- and single-shear bearing response data for material comparison and structural design. Procedures A and D, the double-shear configurations, with a single fastener loaded in shear and reacted by laminate tension or compression, are particularly recommended for basic material evaluation and comparison. Procedures B and C, the single-shear, single- or double-fastener configurations are more useful in evaluation of specific joint configurations, including fastener failure modes. The Procedure B specimen may be tested in either an unstabilized (no support fixture) or stabilized configuration. The unstabilized configuration is intended for tensile loading and the stabilized configuration is intended for compressive loading (although tensile loading is permitted). The Procedure C specimen is particularly well-suited for development of countersunk-fastener bearing strength data where a near-double-shear fastener rotational stiffness is desired. These Procedure B and C configurations have been extensively used in the development of design allowables data.

5.2 It is important to note that these four procedures, using the standard test configurations, will generally result in bearing strength mean values that are not of the same statistical population, and thus not in any way a “basic material property.”

Note 2: Typically, Procedure D will yield slightly higher strengths than Procedure A (due to the finite edge distance, e, in Procedure A); while Procedure C will yield significantly higher strengths than Procedure B (due to the larger fastener rotation and higher peak bearing stress in Procedure B). For protruding head fasteners, Procedure D will typically yield somewhat higher results than Procedure C (due to both stress peaking and finite edge distance in Procedure C), and Procedures A and C yield roughly equivalent results.

5.3 It is also important to note that the parameter variations of the four procedures (tabulated in Section 4) provide flexibility in the conduct of the test, allowing adaptation of the test setup to a specific application. However, the flexibility of test parameters allowed by these variations makes meaningful comparison between datasets difficult if the datasets were not tested using the same procedure and identical test parameters.

5.4 General factors that influence the mechanical response of composite laminates and should therefore be reported include the following: material, methods of material preparation and lay-up, specimen stacking sequence, specimen preparation, specimen conditioning, environment of testing, specimen alignment and gripping, speed of testing, time at temperature, void content, and volume percent reinforcement.

5.5 Specific factors that influence the bearing response of composite laminates and should therefore be reported include not only the loading method (either Procedure A, B, or C) but t

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