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김청산(Cheong San Kim),정한비(Han Bi Jeong),하종현(Jonghyun Ha),이안나(Anna Lee),김호영(Ho-Young Kim) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Recently, capability of shape changes is considered essential for soft robots to have functionality while interacting with the surrounding environment. A variety of morphing systems have been suggested by exploiting soft materials that can be deformed by various stimuli, such as pneumatic pressure, light, temperature, and humidity. Here, we introduce novel strategies for dual morphing Pneu-nets capable of sequential transformation with a single pressure input, inspired by the biological structure of the lotus leaf. The morphing of the Pneumatic actuator is caused by the difference in stiffness of each wall, and this can be controlled by utilizing the strain-hardening effect of polymers or using hybrid materials. Dual morphing Pneu-nets morph sequentially as the pressure increasing, e.g., bending-bending, stretching-bending, and bending-twisting. Various shape changes according to the intensity of a single stimulus is an extraordinary technology that allows sophisticated actuations with a simple input, expanding the possibilities of soft robots.