A study on fracture characteristic of structural adhesive at bonded specimen made by 3D printer
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DOI 10.1007/s12206-020-0721-3
Journal of Mechanical Science and Technology 34 (8) 2020 Original Article DOI 10.1007/s12206-020-0721-3 Keywords: · 3D printer · DCB (double cantilever beam) · Structural adhesive · Fracture
A study on fracture characteristic of structural adhesive at bonded specimen made by 3D printer Jae Won Kim1, Chang Ho Jung2 and Jae Ung Cho3 1
Correspondence to: Jae Ung Cho [email protected]
Citation: Kim, J. W., Jung, C. H., Cho, J. U. (2020). A study on fracture characteristic of structural adhesive at bonded specimen made by 3D printer. Journal of Mechanical Science and Technology 34 (8) (2020) ?~?. http://doi.org/10.1007/s12206-020-0721-3
Received May 1st, 2020 Revised
May 18th, 2020
Accepted May 19th, 2020 † Recommended by Editor Chongdu Cho
Department of Mechanical Engineering, Graduate School, Kongju University, Cheonan, Korea, Department of Mechanical Engineering, Graduate School, Inha University, 100 Inha-ro, Michuhol-gu, 3 Incheon, Korea, Division of Mechanical & Automotive Engineering, Kongju University, Cheonan, Korea
2
Abstract
This study aims at investigating the fracture characteristics of adhesive used at double cantilever beam specimens made by 3D printers. The experiment and analysis were carried out under the same conditions. The lower hole of each test specimen was fixed and the upper hole was subjected to the forced displacement of 5 mm. Experimental results show that the adhesive breakdown characteristics of DCB (double cantilever beam) test specimens have a greater effect on the width of the specimen. At TDCB (taperd double cantilever beam) test specimen, it was found that the reaction force was maintained to the adhesive end when the shape factor was 0.3. And DCB specimen with a half of 40 mm is more secure than the other models. TDCB specimen with shape factor of m ≒ 0.2 is more stable than the other models. As a result of this study, it was found that the debonding analysis of adhesive showed the different results from the actual test. It is considered that the basic data on the adhesive and debonding properties of the structures made of the 3D printer can be obtained.
1. Introduction In this study, the adhesive fracture by debonding was studied as a function of shape of double cantilever beam specimens made of ABS filament for 3D printer. While the adhesive debonding experiments with metallic and nonferrous metal materials including aluminum have been conducted thus far, the production of specimens using 3D printer has been implemented for application to this study. For common joint connection, the fastening methods by bolting and riveting as well as fitting methods were frequently used, which caused the strength degradation in a particular part due to the fastening pressures, making the durability vulnerable. In order to secure such a durability, the study was conducted by using the structural adhesives. For such a reason, the debonding experiments were conducted to investigate the adhesive fracture characteristics on each shape after diversified specimens
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