Metamodeling and robust minimization approach for the identification of elastic properties of composites by vibration method (Englisch)

Wie erhalte ich diesen Titel?

Kommerziell Vergütung an den Verlag: 38,41 € Grundgebühr: 4,00 € Gesamtpreis: 42,41 €
Akademisch Vergütung an den Verlag: 38,41 € Grundgebühr: 2,00 € Gesamtpreis: 40,41 €

This paper describes a method for determination of elastic parameters (elastic moduli and Poisson's ratio) of orthotropic composite plate‐type structural elements using the results of natural frequency measurements. The identification of parameter values is provided by minimization of weighted squared difference (discrepancy) between physically measured frequencies and natural frequencies calculated by Finite Element Method. The metamodels for the frequency dependence on the elastic parameters and other geometrical and physical parameters of test specimens, including parameters with uncertainty (“noisy constants”) are built using experimental designs optimized according to the Mean Squared Error space filling criterion and third‐order polynomial approximations. The minimum of weighted squared difference between measured and calculated frequencies is found using the multistart random search method. The expressions for standard deviations of identified parameters depending on deviations of “noisy constants” are derived using linearized metamodels. The expressions for identification errors allow the statement of the identification task as a robust minimization problem by simultaneous minimization of the discrepancy function and standard deviations of the identified values by varying the values of unknown elastic parameters and weighting coefficients for different frequencies. The partial scaling of natural frequencies is used for the reduction of the uncertainty impact on the identification error. This allows reducing the identification error of elastic moduli about two times and Poisson's ratio about 20 times in comparison with the results obtained by using dimensioned frequencies.

Inhaltsverzeichnis – Band 95, Ausgabe 10

Zeige alle Jahrgänge und Ausgaben

Die Inhaltsverzeichnisse werden automatisch erzeugt und basieren auf den im Index des TIB-Portals verfügbaren Nachweisen der enthaltenen Aufsätze. Die Anzeige der Jahrgänge kann aufgrund fehlender Aufsatznachweise unvollständig oder lückenhaft sein, obwohl die Zeitschrift komplett in der TIB verfügbar ist.

Contents: ZAMM 10/2015
| 2015
80th birthday of Prof. Vitauts Tamuzs
| 2015
The spin, the nutation, and the precession of the Earth's axis revisited from a (numerical) mechanics perspective
Müller, Wolfgang H. | 2015
On the use of the first order shear deformation plate theory for the analysis of three‐layer plates with thin soft core layer
Altenbach, Holm / Eremeyev, Victor A. / Naumenko, Konstantin | 2015
Metamodeling and robust minimization approach for the identification of elastic properties of composites by vibration method
Auzins, Janis / Chate, Andris / Rikards, Rolands / Skukis, Eduards | 2015
Crack closure effects in thermal fracture of functionally graded/homogeneous bimaterials with systems of cracks
Petrova, Vera / Schmauder, Siegfried | 2015
Dielectric signatures and interpretive analysis for changes of state in composite materials
Raihan, Rassel / Reifsnider, Kenneth / Cacuci, Dan / Liu, Qianlong | 2015
Modeling of passive and active external confinement of RC columns with elastic material
Rousakis, Theodoros C. / Tourtouras, Ioannis S. | 2015
A mechanisms‐based reliability model for fatigue of composite laminates
Talreja, Ramesh | 2015
Two‐level models of polycrystalline elastoviscoplasticity: Complex loading under large deformations
Trusov, Peter V. / Volegov, Pavel S. / Yanz, Anton Yu. | 2015
Strategies for stiffness analysis of laminates with microdamage: combining average stress and crack face displacement based methods
Varna, Janis | 2015
Modeling and experimental investigations of elastic and creep properties of thermoplastic polymer nanocomposites
Zicāns, Jānis / Merijs Meri, Remo / Kalniņš, Mārtiņš / Maksimovs, Roberts / Jansons, Juris | 2015
Cover Picture: ZAMM 10/2015
| 2015
Issue Information: ZAMM 10/2015
| 2015