- Volume 40 Issue 6
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An Analytical Study on Crack Behavior Inside Standard Compact Tension Specimen with Holes
구멍들을 가진 표준 CT 시험편 내에서의 크랙 거동에 대한 해석적 연구
- Lee, Jung Ho (Dept. of Mechanical Engineering, Graduate School, Kongju Nat'l Univ.) ;
- Cho, Jae Ung (Div. of Mechanical and Automotive Engineering, Kongju Nat'l Univ.)
- Received : 2015.03.31
- Accepted : 2016.03.21
- Published : 2016.06.01
The damage and fracture of machine or structure are caused by the crack happened from the defect existed at the inside of material. The properties of crack propagation and growth characteristic must be considered because there are many cases at which these cracks are densely existed. Therefore, this study investigates the fracture property due to the position of crack and hole inside the standard compact tension (C. T.) specimen. When the concentrated load is applied eccentrically at the standard C. T. specimen, the fracture mechanical behavior due to the existence or non-existence and the position of hole near crack is investigated. As the result of analysis study, model 3 (in case of the distance of 2mm on the horizontal direction between the end part and hole as the specimen model existed with one hole near the crack) has the maximum deformation, stress and deformation energy of the most values among three models. As the distance between the crack and hole inside the specimen becomes nearer, the maximum stress becomes higher in cases of three models. Apart from the number of holes, it is seen that the maximum stress becomes higher near the crack when the hole exists near the crack inside the specimen. If the hole inside the machine or the mechanical structure is punctured by using the result of this study, it is thought that the occurred breakage or breakdown can be prevented by reducing the fracture stress happened at the specimen.
Supported by : 한국연구재단
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