Abstract
The asymmetrical four-point bend (AFPB) shear test, which is the subject of this paper, was originally developed by Slepetz et al. to evaluate the shear properties of large metallic specimens and polymer composites. Similar to the Iosipescu test, the AFPB test also provides a nearly pure-shear stress state with an unnotched specimen. However, since the AFPB test involves point loading as opposed to distributed surface loading in the case of the Iosipescu test, the shear force generated in this method depends on the fixture dimensions. Therefore, its use has been very limited. Recently, it was shown that this method could be used to evaluate high temperature shear properties of small ceramic composite joints. Thus, as an extension to the earlier aforementioned work, the goal of this study was to investigate the application of AFPB test method to small metallic test specimens. In this work, the Iosipescu shear test was also used to check the accuracy of results from the AFPB tests. The stress analysis of this test method by finite element modeling (FEM) will be published elsewhere.
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