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http://dx.doi.org/10.3795/KSME-A.2010.34.8.965

Structure Optimization of a Nut for Prevention of Bolt Loosening  

Cheong, Kwang-Yeil (Dept. of Mechanical Engineering, Ajou Univ.)
Park, Tae-Won (Dept. of Mechanical Engineering, Ajou Univ.)
Jung, Sung-Pil (Dept. of Mechanical Engineering, Ajou Univ.)
Chung, Won-Sun (Korea Automotive Technology Institute)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.34, no.8, 2010 , pp. 965-970 More about this Journal
Abstract
Bolts and nuts are widely used to fasten mechanical parts together in machines and structures. The primary role of a nut is to maintain the axial force of a bolt. In this paper, a new type of a lock nut that uses a spring is studied. To have a spring within a nut, a cocking process to narrow the top of the nut is adopted, but cracking occurred in the process. In this study, strain of an initial model is measured using the finite element analysis program, MSC/Marc. The occurrence of the crack was studied by comparing the maximum observed strain of a model with the maximum strain indicated by an accurate stress-strain diagram of 1020 steel. Then, the structure of the lock nut was optimized by response surface analysis to prevent cracking. The prototype of the lock nut was manufactured on the basis of the optimization result, and cracking did not occur.
Keywords
Lock Nut; Strain; Crack; Finite Element Method; Response Surface Analysis Method;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 0
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