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Article
Effect of Tensile Offset Angles on Micro/Nanoscale Tensile Testing
Review of Scientific Instruments
  • Xiaodong Li, University of South Carolina - Columbia
  • Xinnan Wang
  • Wei-Che Chang
  • Yuh-Jin Chao, University of South Carolina - Columbia
  • Ming Chang
Publication Date
3-1-2005
Document Type
Article
Abstract
For one-dimensional (1D) structures such as tubes, wires, and beams, tensile testing is a simple and reliable methodology for measuring their mechanical properties. The tensile offset angle effect on mechanical property measurement has long been ignored. In this study, theoretical and finite-element analysis(FEA) models for analyzing the tensile offset angle effect have been established. It is found that longitudinal stress decreases with increasing offset angles. The theoretically calculated elastic modulus relative errors reach 4.45% at the offset angle of 10°, whereas the experimentally measured elastic modulus relative errors are 45.4% at the offset angle of 15°. The difference in elastic modulus relative errors between the theoreticalanalysis and the experimental results is discussed with reference to the sensing system in the experimental instrumentation. To accurately measure the mechanical properties using the tensile testing technique, perfect alignment with a zero or small offset angle less than 5° is needed. A calibration methodology for aligning specimens has been developed.
Citation Information
Xiaodong Li, Xinnan Wang, Wei-Che Chang, Yuh-Jin Chao, et al.. "Effect of Tensile Offset Angles on Micro/Nanoscale Tensile Testing" Review of Scientific Instruments Vol. 76 Iss. 3 (2005) p. #033904
Available at: http://works.bepress.com/xiaodong_li/90/