DataVXInternational Journal of Mechanics and Materials in DesignPaper
journal article·2024-06

A revised bending model of inflatable beam considering the shear effect in varying inner pressure

Changle Sun, Shihao Ge, Yong Nie, Mingzhi Liu, Xiaoxing Zhang

International Journal of Mechanics and Materials in Design· Volume 20· Issue 3
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Source abstract

Abstract

Inflatable beam can be regarded as thin-walled beam structure with uniform pressure on the inner wall. In the bending behavior of inflatable beams, there is a noticeable shear effect, causing the cross-section to deviate from the beam`s axis. By defining a local coordinate system, the shear effect can be described more accurately. However, the stiffness of the inflatable beam is inconstant under the varying inner pressure. And the inner pressure changes the geometric parameters of the inflatable beam through expansion, thereby changing its section characteristics, and ultimately affecting the expression of the shear effect. Therefore, the application scope of the results obtained by using fixed material parameters is limited. On the basis of previous studies, a revised bending model of inflatable beam considering the shear effect in varying inner pressure is proposed by establishing the relationship between internal pressure, dynamic stiffness and shear effect. The three-point central concentrated load bending experiment of a simply supported beam is then investigated. The computed outcomes of the model are juxtaposed with the results derived from three-dimensional finite element analysis and empirical experimentation, revealing a significant concordance. The model`s reliability was further confirmed through comparisons with established models.
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Research context

OpenAlex topics: Structural Analysis and Optimization · Vibration and Dynamic Analysis · Advanced Materials and Mechanics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

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