Real-time displacement monitoring of a composite stiffened panel subjected to mechanical and thermal loads

Cerracchio, Priscilla; Gherlone, Marco; Tessler, Alexander

doi:10.1007/s11012-015-0146-8

Cited by 70 publications

(34 citation statements)

References 23 publications

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“…A cantilever test was used for demonstration. Cerracchio et al [47] used the linear inverse FEM to perform real time full-field reconstruction of displacements based on limited set of discrete strain data. To obtain the strain data, in situ strain measurements of the deformed structural shape were done.…”

Section: Full Extent Fe Models In Real-time Applicationsmentioning

confidence: 99%

Survey of Finite Element Method-Based Real-Time Simulations

Marinković

Zehn

2019

Applied Sciences

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The finite element method (FEM) has deservedly gained the reputation of the most powerful, highly efficient, and versatile numerical method in the field of structural analysis. Though typical application of FE programs implies the so-called “off-line” computations, the rapid pace of hardware development over the past couple of decades was the major impetus for numerous researchers to consider the possibility of real-time simulation based on FE models. Limitations of available hardware components in various phases of developments demanded remarkable innovativeness in the quest for suitable solutions to the challenge. Different approaches have been proposed depending on the demands of the specific field of application. Though it is still a relatively young field of work in global terms, an immense amount of work has already been done calling for a representative survey. This paper aims to provide such a survey, which of course cannot be exhaustive.

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Section: Full Extent Fe Models In Real-time Applicationsmentioning

confidence: 99%

Survey of Finite Element Method-Based Real-Time Simulations

Marinković

Zehn

2019

Applied Sciences

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“…iFEM does not only reconstruct mechanical deformation of a beam and plate but also thermal deformation and composite structures, such as sandwich structures. Cerracchio et al [ 13 ] used iFEM to reconstruct mechanical and thermal deformation of typical composite stiffened structures. They also employed iFEM as a general framework and the Refined Zigzag Theory (RZT) as the underlying plate theory to monitor deformation and stress in laminated composite and sandwich structures [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Inverse Finite Element Method for Reconstruction of Deformation in the Gantry Structure of Heavy-Duty Machine Tool Using FBG Sensors

Liu

Zhang

Song

et al. 2018

Sensors

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The deformation of the gantry structure in heavy-duty machine tools is an important factor that affects machining accuracy. In order to realize real-time monitoring of the deformation of the gantry structure, which is statically indeterminate and complex in shape, the reconstruction algorithm based on inverse Finite Element Method (iFEM) is proposed and fiber Bragg grating (FBG) sensors are used to measure strain data. The elements of the gantry structure are divided and the displacement functions of each element are determined. The shape function is obtained by substituting degree of freedoms (DOF) of element nodes into displacement functions. Through a differential method, the relation between strain and DOF of element nodes is established by the strain matrices. Subsequently, the DOF of element nodes are obtained by minimizing an error functional defined as the least-squares error between the analytic strain data and the corresponding experimental strains. Considering coordinate transformation and problem-specific displacement boundary conditions, the total deformation of the gantry structure is obtained. Following this, the experiment was carried out. The deformation simulated by ANSYS was used to replace the experimentally measured deformation and then compared with the deformation reconstructed by iFEM under the same loading condition. The accuracy of iFEM for reconstructing deformation of the gantry structure in heavy-duty machine tools is verified. It provides a new view for improving the machining precision of heavy-duty machine tools.

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“…Since the first publication of the iFEM algorithm in [26,27], various theoretical studies including a three-node inverse shell element [28], a four-node quadrilateral inverseshell element [29], and an efficient inverse frame element [12,[30][31][32] have been devoted to expanding the horizon of the iFEM methodology in the literature. In addition, the iFEM framework was applied to not only SHM of future aerospace vehicles in [33][34][35]56], but also shape and stress sensing of marine structures in [36][37][38]. Recently, a U.S. patent (US 8,515,675 B2) was obtained for a system that performs shape sensing of a downhole structure by using the iFEM methodology [39].…”

Section: Introductionmentioning

confidence: 99%

An enhanced inverse finite element method for displacement and stress monitoring of multilayered composite and sandwich structures

Kefal

Tessler

Öterkuş

2017

Composite Structures

Self Cite

106

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The inverse finite element method (iFEM) is an innovative framework for dynamic tracking of full-field structural displacements and stresses in structures that are instrumented with a network of strain sensors. In this study, an improved iFEM formulation is proposed for displacement and stress monitoring of laminated composite and sandwich plates and shells. The formulation includes the kinematics of Refined Zigzag Theory (RZT) as its baseline. The present iFEM methodology minimizes a weighted-least-squares functional that uses the complete set of strain measures of RZT. The main advantage of the current formulation is that highly accurate through-the-thickness distributions of displacements, strains, and stresses are attainable using an element based on simple C0-continuous displacement interpolation functions. Moreover, a relatively small number of strain gauges is required. A three-node inverse-shell element, named i3-RZT, is developed. Two example problems are examined in detail: (1) a simply supported rectangular laminated composite plate and (2) a wedge structure with a hole near one of the clamped ends. The numerical results demonstrate the superior capability and potential applicability of the i3-RZT/iFEM methodology for performing accurate shape and stress sensing of complex composite structures

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Real-time displacement monitoring of a composite stiffened panel subjected to mechanical and thermal loads

Cited by 70 publications

References 23 publications

Survey of Finite Element Method-Based Real-Time Simulations

Survey of Finite Element Method-Based Real-Time Simulations

Inverse Finite Element Method for Reconstruction of Deformation in the Gantry Structure of Heavy-Duty Machine Tool Using FBG Sensors

An enhanced inverse finite element method for displacement and stress monitoring of multilayered composite and sandwich structures

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