Challenges in Damage Detection Based on Finite Element Analyses and Monitoring of Dynamic Curvature of Concrete-steel Composite Structures

Abstract A three-dimensional (3D) beam finite element model was developed to investigate the torsional stiffness of a twisted steel-reinforced cord-rubber belt structure. The present 3D beam element takes into account the coupled extension, bending, and twisting deformations characteristic of the complex behavior of cord-rubber composite structures. The extension-twisting coupling due to the twisted nature of the cords was also considered in the finite element model. The results of torsional stiffness obtained from the finite element analysis for twisted cords and the two-ply steel cord-rubber belt structure are compared to the experimental data and other alternate solutions available in the literature. The effects of cord orientation, anisotropy, and rubber core surrounding the twisted cords on the torsional stiffness properties are presented and discussed.

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A 3-D Constitutive Model of Agarose with a Range of Gel Concentrations Facilitates Finite Element Analyses Aimed at Mechanobiology

10.26226/morressier.5f5f8e69aa777f8ba5bd5fa3 ◽

2020 ◽

Author(s):

David M. Pierce

Keyword(s):

Finite Element ◽

Constitutive Model ◽

Finite Element Analyses

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Behaviour of Axially Loaded Composite Wall Panel by Using Finite Element Analysis

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.815.49 ◽

2015 ◽

Vol 815 ◽

pp. 49-53

Author(s):

Nur Fitriah Isa ◽

Mohd Zulham Affandi Mohd Zahid ◽

Liyana Ahmad Sofri ◽

Norrazman Zaiha Zainol ◽

Muhammad Azizi Azizan ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Composite Structures ◽

Element Analysis ◽

Steel Sheets ◽

Linear Behavior ◽

Non Linear ◽

Composite Wall ◽

Experimental Values ◽

Civil Engineering Infrastructure

In order to promote the efficient use of composite materials in civil engineering infrastructure, effort is being directed at the development of design criteria for composite structures. Insofar as design with regard to behavior is concerned, it is well known that a key step is to investigate the influence of geometric differences on the non-linear behavior of the panels. One possible approach is to use the validated numerical model based on the non-linear finite element analysis (FEA). The validation of the composite panel’s element using Trim-deck and Span-deck steel sheets under axial load shows that the present results have very good agreement with experimental references. The developed finite element (FE) models are found to reasonably simulate load-displacement response, stress condition, giving percentage of differences below than 15% compared to the experimental values. Trim-deck design provides better axial resistance than Span-deck. More concrete in between due to larger area of contact is the factor that contributes to its resistance.

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Design of flexure revolute joint based on compliance and stiffness ellipsoids

Proceedings of the Institution of Mechanical Engineers Part G Journal of Aerospace Engineering ◽

10.1177/09544100211016978 ◽

2021 ◽

pp. 095441002110169

Author(s):

Jing Zhang ◽

Hong-wei Guo ◽

Juan Wu ◽

Zi-ming Kou ◽

Anders Eriksson

Keyword(s):

Finite Element ◽

Single Point ◽

Synthesis Method ◽

Nonlinear Finite Element ◽

Finite Element Analyses ◽

Rotational Stiffness ◽

Rotational Angle ◽

Parameterized Model ◽

Flexure Joints ◽

Translational Stiffness

In view of the problems of low accuracy, small rotational angle, and large impact caused by flexure joints during the deployment process, an integrated flexure revolute (FR) joint for folding mechanisms was designed. The design was based on the method of compliance and stiffness ellipsoids, using a compliant dyad building block as its flexible unit. Using the single-point synthesis method, the parameterized model of the flexible unit was established to achieve a reasonable allocation of flexibility in different directions. Based on the single-parameter error analysis, two error models were established to evaluate the designed flexure joint. The rotational stiffness, the translational stiffness, and the maximum rotational angle of the joints were analyzed by nonlinear finite element analyses. The rotational angle of one joint can reach 25.5° in one direction. The rotational angle of the series FR joint can achieve 50° in one direction. Experiments on single and series flexure joints were carried out to verify the correctness of the design and analysis of the flexure joint.

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