A Novel Variable Extensometer Method for Measuring Ductility Scaling Parameters From Single Specimens

Smith, Adam J.; Maxwell, Hannah L.; Mirmohammad, Hadi; Kingstedt, Owen T.; Berke, Ryan B.

doi:10.1115/1.4053034

A Novel Variable Extensometer Method for Measuring Ductility Scaling Parameters From Single Specimens

Journal Article · 07 December 2021 · Journal of Applied Mechanics

DOI:https://doi.org/10.1115/1.4053034· OSTI ID:1980681

Smith, Adam J.; Maxwell, Hannah L.; Mirmohammad, Hadi; Kingstedt, Owen T.; Berke, Ryan B.

Abstract Macro-scale ductility is not an intrinsic material property but is dependent on the overall geometry of the specimen. To account for variety in specimen geometries, multiple ductility scaling laws have been developed, which scale ductility between different specimen sizes. Traditionally, these ductility laws rely on testing multiple different specimens of varying sizes to obtain material parameters, often done by varying gauge lengths. With the use of digital image correlation (DIC), this study presents a technique where multiple different gauge lengths are extracted from a single specimen to obtain ductility scaling parameters from a single experiment. This technique provides orders of magnitude more data from each specimen than previous techniques. This variable extensometer method is then validated by testing multiple different geometries, and select scaling laws are then compared.

Research Organization:: Univ. of Utah, Salt Lake City, UT (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

DOE Contract Number:: NE0008799

OSTI ID:: 1980681

Journal Information:: Journal of Applied Mechanics, Vol. 89, Issue 3; ISSN 0021-8936

Publisher:: ASME

Country of Publication:: United States

Language:: English

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