대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)
- 제21권1호
- /
- Pages.104-111
- /
- 1997
- /
- 1226-4873(pISSN)
- /
- 2288-5226(eISSN)
DOI QR Code
$90^{\circ}C$ 위상차의 이축하중 하에서 A17075-T651의 부가적 손상에 관한 결정구조 의존성에 관한 연구
Additional Damage of A17075-T651 under $90^{\circ}C$ Out-of phase Biaxial Loading from Crystal Structure Dependence
- Lee, Hyun-Woo (Dept.of Precision Mechanical Engineering, Busan National University) ;
- Oh, Se-Jong (Graduate School of Busan National University)
- 발행 : 1997.01.01
초록
Accounting for the additional damages come out from non-proportional loading path effect, material damage according to crystal structure dependence was studied. Microscopic observations of damaged material by SEM(Scanning Electron Microscope) showed crystal structure dependence. Biaxial in-phase loaded specimens showed the slips of same direction, which pararell each other, but biaxial 90.deg. out-of-phase loaded specimens showed multiply crossed slips. S. H. Doong and D. F. Socie reported that wavy/planar or planar slip material showed the increase in the cyclic hardening level during non-proportional cycling. From these results, the additional hardening and non-proportional loading effects were related with slip mechanism, and the slip mechanism was related with crystal structure. In the present study, a damage mechanism which accounts for the non-proportional loading effect from crystal structure dependence was considered and applied to A17075-T651.
키워드