Fatigue characteristics of jagged steel pin-reinforced composite hat-joints under pull-off loading
Source abstract
Abstract
This study focuses on the reinforcement effect provided by surface-treated jagged pins on the pull-off fatigue strength of composite hat-joint structures intended for the joining area of stiffened sections in aircraft composite fuselages under at room temperature. The study utilizes pin diameters of 0.3 mm, 0.5 mm, and 0.7 mm, along with pin-areal-densities of 0.5% and 2%, as the test parameters. The investigation involved subjecting the joints to cyclic pull-off loading. Additionally, to evaluate the reinforcing impact of jagged pins, a comparison was made with a hat-joint reinforced by a standard, untreated pin. The results revealed a significant enhancement in pull-off fatigue strength compared to non-reinforced hat-joints. At a pin diameter of 0.3 mm and a pin-areal-density of 2%, the maximum improvement observed was 141%. Furthermore, the pull-off fatigue strength achieved by the jagged pins was 52% higher than that of regular pins. These test outcomes lead to the conclusion that the implementation of jagged pin reinforcement can substantially improve the pull-off fatigue strength of composite hat-joint structures.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Mechanical Behavior of Composites · Structural Load-Bearing Analysis · Mechanical Engineering and Vibrations Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Mechanical and Aerospace Engineering, Gyeongsang National University Composite Structures Laboratory, 501, Jinju-daero, Jiuju-si, Gyeongnam-do, Republic of Korea
Automotive Materials & Components Division, LX Hausys, 30, Magokjungang 10-ro, Gangseo-gu, Seoul, Republic of Korea
Graduated School of Aerospace and Mechanical Engineering, Korea Aerospace University, 76, Hanggongdaehak-ro, Deogyang-gu, Goyang-si, Gyeonggi-do, Republic of Korea
Department of Smart Drone Engineering, Korea Aerospace University, 76, Hanggongdaehak-ro, Deogyang-gu, Goyang-si, Gyeonggi-do, Republic of Korea
Funding
National Research Foundation of Korea
References (36)
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