Title

Identification of Nodal Snap-Through Instability in Civil Space Structures

Abstract

In the community of structural health monitoring (SHM) and damage detection, the majority of previous research efforts has been focused on the detection of the reduction in cross-sectional areas of structural components or connections. However, the detection of the loss of stability, which can easily result in a structural failure, has been lacking. The objective of this study is to identify the occurrence of instability in civil space structures, such as domes, shells and reticulated shell structures. For this type of structure, nodal snap-Through instability occurs, where a node and connected members jump to a new equilibrium position, leading the geometric shape/pattern in a local area to change significantly. In this study, we propose to use tilting angles of members to identify the nodal snap-Through instability of civil space structures. Tilting angles of members actually reflect the change in geometric shape caused by instability. The effectiveness of this approach will be validated on numerical simulations of a reticulated shell structure. This research will bridge the gap between SHM and structural stability research and will make important contributions to the science of both SHM and structural instability.

Meeting Name

ASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2015 (2015: Sep. 21-23, Colorado Springs, CO)

Department(s)

Civil, Architectural and Environmental Engineering

Comments

The authors greatly appreciate the financial support from National Science Foundation, the Hazard Mitigation and Structural Engineering program, through the project of "Damage and Instability Detection of Civil Large-scale Space Structures under Operational and Multi-hazard Environments" (Award No.: 1405023).

Keywords and Phrases

Damage detection; Energy harvesting; Fracture mechanics; Intelligent materials; Intelligent systems; Space applications; Space platforms; Stability; Cross sectional area; Equilibrium positions; Reticulated shell structure; Snap-through instability; Structural component; Structural health monitoring (SHM); Structural instability; Structural stabilities; Structural health monitoring

International Standard Book Number (ISBN)

978-0-7918-5730-4

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2015 American Society of Mechanical Engineers (ASME), All rights reserved.

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