인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Planthoppers are champion jumpers. Adult specimens are propelled by rapid movements of the hind legs, which can launch them a horizontal distance of 1.1 m with a take-off speed of 5.5 m/s, demonstrating high power output. The planthopper Issus Coleoptratus nymph achieves the precise synchronization required (30 μs) thanks to a pair of cuticular gears that kinematically link the hind legs. These cuticular gears show spectacular geometrical differences from conventional man-made mechanisms. We analysed the gear teeth of Issus Coleoptratus in combination with Micro-CT scans of the teeth to study the gearing properties. The results show that the Issus gear has a higher contact ratio than conventional man-made involute spur gears. If the Issus gear is rescaled to a tooth size equivalent to a conventional gear module of 4.5mm, an ISO standard involute gear can mesh, with no problem, with the Issus gears. In simulations, if the resized gear is subjected to the load borne by a conventional automotive gear made of steel, the maximum stress obtained for the Issus gear is higher on the tooth flank than for the conventional gear. This is a potentially interesting result, as one of the disadvantages of the ISO gear is that failure generally occurs at the root of the tooth due to stress concentration, leading to gear failure. Finally, a strength analysis is carried out with the application of the real load transmitted by the gear during a badly engaged jump showing that, thanks to its gear high contact ratio, it is possible for the Issus to compensate for any problems arising from a non-symmetrical jump, and therefore to perform a synchronized jump in any poorly engaged situation.
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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