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Controllable load sharing for soft adhesive interfaces on three-dimensional surfaces
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DOI：10.1073/pnas.1620344114.png)
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摘要
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For adhering to three-dimensional (3D) surfaces or objects, current adhesion systems are limited by a fundamental trade-off between 3D surface conformability and high adhesion strength. This limitation arises from the need for a soft, mechanically compliant interface, which enables conformability to nonflat and irregularly shaped surfaces but significantly reduces the interfacial fracture strength. In this work, we overcome this trade-off with an adhesion-based soft-gripping system that exhibits enhanced fracture strength without sacrificing conformability to nonplanar 3D surfaces. Composed of a gecko-inspired elastomeric microfibrillar adhesive membrane supported by a pressure-controlled deformable gripper body, the proposed soft-gripping system controls the bonding strength by changing its internal pressure and exploiting the mechanics of interfacial equal load sharing. The soft adhesion system can use up to similar to 26% of the maximum adhesion of the fibrillar membrane, which is 14x higher than the adhering membrane without load sharing. Our proposed load-sharing method suggests a paradigm for soft adhesion-based gripping and transfer-printing systems that achieves area scaling similar to that of a natural gecko footpad.
Keyword:
soft gripper
equal load sharing
fracture mechanics
fibrillar adhesives
gecko
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9.1
论文数:
10.8W
被引数:
73.5W
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Wet Self-Cleaning of Biologically Inspired Elastomer Mushroom Shaped Microfibrillar Adhesives.png)
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