Multistability inspired by the oblique, pennate architectures of skeletal muscle

Narayanan Kidambi; Ryan L. Harne; K. W. Wang

doi:10.1117/12.2259990

11 April 2017 Multistability inspired by the oblique, pennate architectures of skeletal muscle

Narayanan Kidambi, Ryan L. Harne, K. W. Wang

Proceedings Volume 10164, Active and Passive Smart Structures and Integrated Systems 2017; 1016415 (2017) https://doi.org/10.1117/12.2259990
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2017, Portland, Oregon, United States

Abstract

Skeletal muscle mechanics exhibit a range of noteworthy characteristics, providing great inspiration for the development of advanced structural and material systems. These characteristics arise from the synergies demonstrated between muscle’s constituents across the various length scales. From the macroscale oblique orientation of muscle fibers to the microscale lattice spacing of sarcomeres, muscle takes advantage of geometries and multidimensionality for force generation or length change along a desired axis. Inspired by these behaviors, this research investigates how the incorporation of multidimensionality afforded by oblique, pennate architectures can uncover novel mechanics in structures exhibiting multistability. Experimental investigation of these mechanics is undertaken using specimens of molded silicone rubber with patterned voids, and results reveal tailorable mono-, bi-, and multi-stability under axial displacements by modulation of transverse confinement. If the specimen is considered as an architected material, these results show its ability to generate intriguing, non-monotonic shear stresses. The outcomes would foster the development of novel, advanced mechanical metamaterials that exploit pennation and multidimensionality.

Citation Download Citation

Narayanan Kidambi, Ryan L. Harne, and K. W. Wang "Multistability inspired by the oblique, pennate architectures of skeletal muscle", Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 1016415 (11 April 2017); https://doi.org/10.1117/12.2259990

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KEYWORDS

Mechanics

Silicon

Stars

Metamaterials

Bistability

Bridges

Fiber to the x

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