Abstract
This paper aims at studying on the fracture behavior due to crack propagation at compact tension specimen composed of inhomogeneous metal materials with holes near main crack. In this study, the experiments were performed for compact tension specimens produced by the mutual bonding metals of stainless steel and brass, and the simulation analyses to verify these experiments were conducted. When the preceding study results are confirmed, the design of structures with no holes near a crack becomes more durable on the strength aspect than the design of structures with holes existing near the crack. The design for highest strength is possible if no holes are pierced in inhomogeneous metal materials bonded with adhesives. On the other hand, in case the holes due to additional bolt and rivet fastening must be pierced, the most similar tendency to that of materials without holes is exhibited when the hole center is placed by about 20 mm from the crack tip. A great difference in strength occurs according to the hole position near the main crack at inhomogeneous metal materials bonded with adhesives. So, the design considering this aspect is deemed important. The data for different positions where the crack propagations occur can be confirmed at analysis and experimental results. Therefore, the changes inside the material that are actually difficult to confirm due to the crack growth characteristics at inhomogeneous materials can be expected through an analysis. The fracture behavior of inhomogeneous metal materials bonded by adhesives was investigated through the experiment and analysis. The basic data through this study could be secured at contributing to the developed design of light-weight composite materials as well as bonding the technology for mutually different materials.
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Abbreviations
- K:
-
Stress intensity factor
- P :
-
The applied load
- B :
-
The thickness of the specimen
- a :
-
The crack length
- W :
-
The width of the specimen
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This work was supported by the research grant of the Kongju National University in 2018.
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Kye Kwang Choi received M.S. and Ph.D. degrees in Department of Mechanics & Design from Kookmin University, Republic of Korea (CAD and CAM Programing). After working as a Technical Department Director at Hyundai Pipe Line Co., Ltd., now he is currently a Professor in Department of Metal-mold Design Engineering, Kongju National University, Cheonan in Republic of Korea. His research areas are 3D CAD and CAM Programing.
Jung Ho Lee is a graduate student in Department of Mechanical Engineering at Ph.D. course of Kongju National University, Cheonan, Republic of Korea. His field of specialization are Fracture Mechanics (Dynamic Impact), Impact Fracture of Composite Material), Fatigue & Strength Evaluation, and Durability & Optimum Design.
Jae Ung Cho received his M.S. and Ph.D. degrees in Mechanical Engineering from Inha University, Incheon, Republic of Korea, in 1982 and 1986, respectively. Now he is a Professor in Division of Mechanical & Automotive Engineering of Kongju National University, Korea. He is interested in the areas of fracture mechanics (dynamic impact), composite material, fatigue and strength evaluation.
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Choi, K.K., Lee, J.H. & Cho, J.U. A study on fracture behavior due to crack propagation at compact tension specimen composed of inhomogeneous metal materials with holes near crack. J Mech Sci Technol 33, 4803–4811 (2019). https://doi.org/10.1007/s12206-019-0921-x
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DOI: https://doi.org/10.1007/s12206-019-0921-x