Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Analysis of Mechanical Behaviors of Waterbomb Thin-Shell Structures Under Quasi-Static Load

Version 1 : Received: 11 January 2021 / Approved: 12 January 2021 / Online: 12 January 2021 (12:20:55 CET)

How to cite: Zhao, L.; Shang, Z.; Zhang, T.; Liu, Z.; Han, L.; Wang, A.C. Analysis of Mechanical Behaviors of Waterbomb Thin-Shell Structures Under Quasi-Static Load. Preprints 2021, 2021010219 (doi: 10.20944/preprints202101.0219.v1). Zhao, L.; Shang, Z.; Zhang, T.; Liu, Z.; Han, L.; Wang, A.C. Analysis of Mechanical Behaviors of Waterbomb Thin-Shell Structures Under Quasi-Static Load. Preprints 2021, 2021010219 (doi: 10.20944/preprints202101.0219.v1).

Abstract

Waterbomb structures are origami-inspired deformable structural components used in new types of robots. They have a unique radially deployable ability that enables robots to better adapt to their environment. In this paper, we propose a series of new waterbomb structures with square, rectangle, and parallelogram base units. Through quasi-static axial and radial compression experiments and numerical simulations, we prove that the parallelogram waterbomb structure has a twist displacement mode along the axial direction. Compared with the square waterbomb structure, the proposed optimal design of the parallelogram waterbomb structure reduces the critical axial buckling load-to-weight ratio by 55.4% and increases the radial stiffness-to-weight ratio by 67.6%. The significant increase in the radial stiffness-to-weight ratio of the waterbomb structure and decrease in the critical axial buckling load-to-weight ratio make the proposed origami pattern attractive for practical robotics applications.

Subject Areas

Waterbomb structure; Origami pattern; Quasi-static load; Critical axial buckling load-to-weight ratio; Radial stiffness-to-weight ratio

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