Abstract
| Language | English |
|---|---|
| Pages | 514-540 |
| Number of pages | 27 |
| Journal | Composite Structures |
| Volume | 179 |
| Early online date | 23 Jul 2017 |
| DOIs | |
| Publication status | Published - 1 Nov 2017 |
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Keywords
- shape sensing
- stress sensing
- multilayered composite structures
- sandwich structures
- inverse finite element method
- refined zigzag theory
- strain sensors
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An enhanced inverse finite element method for displacement and stress monitoring of multilayered composite and sandwich structures. / Kefal, Adnan; Tessler, Alexander; Oterkus, Erkan.
In: Composite Structures, Vol. 179, 01.11.2017, p. 514-540.Research output: Contribution to journal › Article
TY - JOUR
T1 - An enhanced inverse finite element method for displacement and stress monitoring of multilayered composite and sandwich structures
AU - Kefal, Adnan
AU - Tessler, Alexander
AU - Oterkus, Erkan
PY - 2017/11/1
Y1 - 2017/11/1
N2 - 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.
AB - 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.
KW - shape sensing
KW - stress sensing
KW - multilayered composite structures
KW - sandwich structures
KW - inverse finite element method
KW - refined zigzag theory
KW - strain sensors
UR - https://www.sciencedirect.com/journal/composite-structures
U2 - 10.1016/j.compstruct.2017.07.078
DO - 10.1016/j.compstruct.2017.07.078
M3 - Article
VL - 179
SP - 514
EP - 540
JO - Composite Structures
T2 - Composite Structures
JF - Composite Structures
SN - 0263-8223
ER -