On the dynamic shear failure of Ti-6Al-4V in different test specimen geometries

Yutian Du, Zejian Xu*, Caifang Qin, Mengyu Su, P. J. Tan, Fenglei Huang

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

摘要

In this paper, the dynamic shear response and failure of Ti-6Al-4V using four different test specimen geometries, viz. Hat-Shaped Specimen (HSS), Flat Hat-Shaped Specimen (FHSS), Chip Hat-Shaped Specimen (CHSS) and Double Shear Specimen (DSS), are critically examined and compared. Through a combination of experiments (using the standard Split-Hopkinson Pressure Bar system), finite-element simulations and metallographic examinations of their fracture morphology, the dynamic shear characteristics (strain hardening, strain rate strengthening effect and failure strain) of Ti-6Al-4V obtained using the different specimen geometries are critically examined, compared and analyzed. It will be shown that differences in the stress/strain uniformity, the plastic deformation zone, and the stress state induced by the different specimen geometries lead to discrepancies in the measured shear response and failure that were observed. The shear stress–strain curve obtained using the DSS will be shown to be more precise than the other specimen geometries.

源语言英语
文章编号113036
期刊International Journal of Solids and Structures
304
DOI
出版状态已出版 - 1 11月 2024

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