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    Mechanics of Biohybrid Valveless Pump-Bot

    Source: Journal of Applied Mechanics:;2021:;volume( 088 ):;issue: 011::page 0111004-1
    Author:
    Li, Zhengwei
    ,
    Saif, M. Taher A.
    DOI: 10.1115/1.4051595
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Engineering living systems is a rapidly emerging discipline where the functional biohybrid robotics (or “Bio-bots”) are built by integrating of living cells with engineered scaffolds. Inspired by embryonic heart, we presented earlier the first example of a biohybrid valveless pump-bot, an impedance pump, capable of transporting fluids powered by engineered living muscle tissues. The pump consists of a soft tube attached to rigid boundaries at the ends, and a muscle ring that squeezes the tube cyclically at an off-center location. Cyclic contraction results in a net flow through the tube. We observed that muscle force occasionally buckles the tube in a random fashion, i.e., similar muscles do not buckle the tube consistently. In order to explain this anomaly, here we develop an analytical model to predict the deformation and stability of circular elastic tubes subjected to a uniform squeezing force due to a muscle ring (like a taught rubber band). The prediction from the model is validated by comparing with experiments and finite element analysis. The nonlinear model reveals that the circular elastic tube cannot buckle irrespective of muscle force. Buckling state can be reached and sustained by bending and folding the tube before applying the muscle ring. This imperfection may appear during assembly of the pump or from nonuniform thickness of the muscle ring. This study provides design guides for developing advanced biohybrid impedance pumps for diverse applications.
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      Mechanics of Biohybrid Valveless Pump-Bot

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    contributor authorLi, Zhengwei
    contributor authorSaif, M. Taher A.
    date accessioned2022-02-06T05:35:57Z
    date available2022-02-06T05:35:57Z
    date copyright7/12/2021 12:00:00 AM
    date issued2021
    identifier issn0021-8936
    identifier otherjam_88_11_111004.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4278366
    description abstractEngineering living systems is a rapidly emerging discipline where the functional biohybrid robotics (or “Bio-bots”) are built by integrating of living cells with engineered scaffolds. Inspired by embryonic heart, we presented earlier the first example of a biohybrid valveless pump-bot, an impedance pump, capable of transporting fluids powered by engineered living muscle tissues. The pump consists of a soft tube attached to rigid boundaries at the ends, and a muscle ring that squeezes the tube cyclically at an off-center location. Cyclic contraction results in a net flow through the tube. We observed that muscle force occasionally buckles the tube in a random fashion, i.e., similar muscles do not buckle the tube consistently. In order to explain this anomaly, here we develop an analytical model to predict the deformation and stability of circular elastic tubes subjected to a uniform squeezing force due to a muscle ring (like a taught rubber band). The prediction from the model is validated by comparing with experiments and finite element analysis. The nonlinear model reveals that the circular elastic tube cannot buckle irrespective of muscle force. Buckling state can be reached and sustained by bending and folding the tube before applying the muscle ring. This imperfection may appear during assembly of the pump or from nonuniform thickness of the muscle ring. This study provides design guides for developing advanced biohybrid impedance pumps for diverse applications.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleMechanics of Biohybrid Valveless Pump-Bot
    typeJournal Paper
    journal volume88
    journal issue11
    journal titleJournal of Applied Mechanics
    identifier doi10.1115/1.4051595
    journal fristpage0111004-1
    journal lastpage0111004-8
    page8
    treeJournal of Applied Mechanics:;2021:;volume( 088 ):;issue: 011
    contenttypeFulltext
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