A Comparative Study on Strength Characteristics Resulting from Holes or Defects in Notched Tensile Specimens of Heterogeneous Material with Internal Cracks
Jung-Ho Lee1, Jae-Ung Cho2
1Jung-Ho Lee, Department of Mechanical Engineering, Graduate School, Kongju National University, Cheonan Daero, Seobuk-Gu, Cheonan-Si, Chungnam, Korea, East Asian.
2Jae-Ung Cho, Corresponding Author, Division of Mechanical & Automotive Engineering, Kongju National University, Cheonan Daero, Seobuk-Gu, Cheonan-Si, Chungnam, Korea, East Asian.
Manuscript received on 10 June 2019 | Revised Manuscript received on 17 June 2019 | Manuscript Published on 22 June 2019 | PP: 1045-1054 | Volume-8 Issue-8S2 June 2019 | Retrieval Number: H11780688S219/19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open-access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: In this study, the sandwich-style notched tensile specimens were designed with the same specifications by applying to the properties of CFRP, stainless steel, aluminum and brass and then the simulation analyses were carried out. CATIA design software was used to perform the 3D modeling of the sandwich-style notched tensile specimens. And then, the simulation analyses using ANSYS as the finite element analysis program were performed with the properties of CFRP, stainless steel, aluminum and brass. So, the strength characteristic of the sandwich-style notched tensile specimens could be predicted. Combining the study results, the stainless steel-CFRP specimen model was commonly shown to be the best in all results including strain, equivalent stress, and strain energy so that it can be affirmed that the model has a good capability to resist external forces such as tensile loads and that the structural stability is accordingly superior compared with other specimen models. CFRP is considered to be a material that not only has an outstanding capability to resist external forces but also can greatly contribute to the reinforcement of durability and strength characteristics when it is used as an inhomogeneous material together with other materials. In addition, while it was shown to be capable of contributing to the improvement of durability through the reduction of stresses when arranged with holes drilled inside the material, it could be affirmed that finding the optimum position for arrangement of holes rather than the number of holes was the best method for the purpose of this study. Through the results of this study are considered utilizable as basic data in a study on the materials having defects along with cracks inside and in the design of mechanical structures.
Keywords: Notched Tensile Specimen, Holes, Material, Simulation Analysis, Strength Characteristics.
Scope of the Article: Composite Materials