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A Study on the Fatigue Strength Improvement using Weld Toe Burr Grinding  

Kang, Sung-Won (Dept. of Naval Architecture & Ocean Engineering, Pusan National University)
Kim, Myung-Hyun (Dept. of Naval Architecture & Ocean Engineering, Pusan National University)
Choi, Jae-Young (Dept. of Naval Architecture & Ocean Engineering, Pusan National University)
Kim, Wha-Soo (Hull Initial Design Department Shipbuilding Division, Hyundai Heavy Industies Co., Ltd.)
Paik, Young-Min (Hull Initial Design Department Shipbuilding Division, Hyundai Heavy Industies Co., Ltd.)
Publication Information
Journal of Welding and Joining / v.24, no.2, 2006 , pp. 42-47 More about this Journal
Abstract
While it is known that the weld toe grinding method may give 3.4 times of fatigue strength improvement, this improvement may significantly vary according to weld bead shapes and loading modes. Although tremendous interest have been given in improving fatigue strength improvement for ship structures, quantitative results are yet in need. In this context, a series of fatigue tests is carried out for a type of test specimen that are typically found in ship structures. Weld burr grinding is carried out using a electric grinder in order to remove surface defects and improve the weld bead profile. The test results are compared with the same type of test specimen without applying the fatigue improvement technique in order to obtain a quantitative measure of the fatigue strength improvement. On the other hand, both hot spot stress and structural stress methods are employed to compare the effectiveness of the two methods in evaluating the fatigue strength improvement of welded structures.
Keywords
Toe grinding; Fatigue strength; Fatigue test; Burr grinding; Hot spot stress; Structural stress;
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  • Reference
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