Identification of mechanical parameters of fiber-reinforced composites by frequency response function approximation method

Li, Hui; Xue, Pengcheng; Rong, Wanchong; Li, Xiaopeng; Wen, Bangchun

doi:10.1177/0036850419878033

Cited by 8 publications

(5 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Analysis was done to validate experimental data and numerical simulation. Results showed 12% of damage comparison and that is good agreement [24].…”

Section: Free Vibration Analysis On the Design Of Sandwich Materials ...supporting

confidence: 60%

“…Damage assessment is also carried out with a non-destructive test (NDT) using a vibration-based method [13], [14]. Damage can be detected based on several indicators, including natural frequency [15]- [19], mode shape [14], [20], [21], frequency response function (FRF) [22][23][24], curvature method [25][26][27], modal damping [28], and frequency-time domain [29][30][31]. The simplest method is to observe the natural frequency changes.…”

Section: Introduction / Uvodmentioning

confidence: 99%

See 1 more Smart Citation

Identification of Damage Size Effect of Natural Frequency on Sandwich Material using Free Vibration Analysis

Ariesta¹,

Zubaydi²,

Ismail³

et al. 2022

Naše more

View full text Add to dashboard Cite

One of the most innovative developments in the field of advanced materials is sandwich materials. Sandwich material applications need standard requirements to be applied to marine structures, especially on ship construction. Sandwich material research is conducted on a laboratory scale to obtain the appropriate material composition in its development. In the process of developing this material, the material can be damaged. Most damage occurs in the core material, which results in difficulties in the identification process. This study compares damage identification methods based on free vibration analysis on the side sandwich plate of the ship’s hull. Damage-based identification is carried out to determine the response of vibration to the damage that occurs. Moreover, the method in this research uses a numerical approach and experimental vibration measurement. Numerical modelling is used to determine the appropriate boundary conditions and is shifted in experimental measurement. Damage modelling assumes that the material experiences core failure with a numerous variation model. Quantification of damage on the core correlates with natural frequency reduction due to a decrease in the stiffness of the sandwich material. Hence, the difference in the deviation value is used to determine the accuracy of damage identification.

show abstract

“…Analysis was done to validate experimental data and numerical simulation. Results showed 12% of damage comparison and that is good agreement [24].…”

Section: Free Vibration Analysis On the Design Of Sandwich Materials ...supporting

confidence: 60%

Section: Introduction / Uvodmentioning

confidence: 99%

Identification of Damage Size Effect of Natural Frequency on Sandwich Material using Free Vibration Analysis

Ariesta¹,

Zubaydi²,

Ismail³

et al. 2022

Naše more

View full text Add to dashboard Cite

show abstract

“…Here, on the basis of the complex modulus method 39,40 and Jolly theory 41 in conjunction with pre-defined magnetic coefficients, the dynamic moduli EMia∗, GM23∗, and GM12∗ and the loss factors ηMia, η M23 , and η M12 of the MRE layer are regarded as a function of magnetic induction intensity B , generated by the copper coils, which are expressed aswhere EMia, G M23, and G M12 are the elastic moduli of the MRE layer without taking into account internal magnetic effects; Aia, Bia, Cia, and Dia are the magnetic coefficients that can be identified based on the measured frequency response functions (FRFs) with various magnetic amplitudes 42 ; and ϖ is a variable accounting for magnetorheological effects with the following formwhere ϕ r and μ 1 are the volume fraction and relative permeability of carbonyl iron particles (CIPs), respectively; μ r and μ 0 are the relative permeability of the MRE and permeability of a vacuum, respectively; and h r is the gap between different CIPs.…”

Section: Theoretical Formulationsmentioning

confidence: 99%

“…where E Mi a , G M23, and G M12 are the elastic moduli of the MRE layer without taking into account internal magnetic effects; A i a , B i a , C i a , and D i a are the magnetic coefficients that can be identified based on the measured frequency response functions (FRFs) with various magnetic amplitudes 42 ; and ϖ is a variable accounting for magnetorheological effects with the following form…”

Section: Materials Properties Of Mre Layermentioning

confidence: 99%

Static and dynamic performances of sandwich plates with magnetorheological elastomer core: Theoretical and experimental studies

Wang

et al. 2022

Jnl of Sandwich Structures & Materials

Self Cite

View full text Add to dashboard Cite

This paper investigates the static and dynamic performances of sandwich plates with magnetorheological elastomer (MRE) core, in which the MRE core includes two copper wire layers, two inner metal layers, and one MRE layer. First, based on the complex modulus method, the Jolly theory and the pre-defined magnetic coefficients, the dynamic moduli, and loss factors of MRE are assumed as a function of magnetic induction intensity. Furthermore, a theoretical model of the MRE sandwich plates (MRESPs) is proposed, which considers the internal magnetic field excitation and four types of panel materials, namely fiber-reinforced polymer (FRP), fiber-reinforced polymer with carbon nanotubes (CNT-FRP), metal and fiber-metal hybrid (FMH) panels. After the deformation and energy equations are derived to solve the static bearing stiffness, dynamic stiffness, and damping parameters, some literature results are employed to provide the initial validation of the model developed. Subsequently, four MRESP specimens with the FRP, CNT-FRP, metal, and FMH panels are fabricated and measured to further verify the model as well as to evaluate the mechanical performance. The influence of critical geometric and material parameters related to MRE on static and dynamic properties is also discussed to summarize some practical conclusions for engineering applications.

show abstract

“…Hence, we can refer to the identification algorithm of bridge stiffness to identify the weak link of the stiffness of the machine tool cantilever structure. One of the most widely used methods for damage identification is structural modal testing and analysis, [16][17][18][19] and according to the identification analysis, the changes of natural frequency and modal shape in the modal parameters are obtained to measure the size and location of the stiffness changes.…”

Section: Introductionmentioning

confidence: 99%

An identification method of the weak link of stiffness for cantilever beam structure

Guo

Cao

et al. 2020

Science Progress

View full text Add to dashboard Cite

To find the weak link of the structural stiffness is important to improve machine tool stiffness. However, how to overcome the static deformation with difficulty acquisition is a difficult problem in machine tool structure. The article takes the cantilever beam structure as a numerical example, the weak link is modeled as EA reduction in stiffness. Thorough finite element simulations are performed to assess the robustness and limitations of the method in several scenarios with single and multiple weaknesses. The sensors are used to acquire the acceleration data, the structural modal parameters are obtained by the singular value decomposition technique, and the dynamic characteristics are systematically reconstructed by using the modal state-space method to obtain static stiffness. Then, an identification method proposed by measured data and reconstructed data to identify the weak link of stiffness of the cantilever structure. Furthermore, the comparison of numerical and experimental results validate the correctness and effectiveness of this method. The research has certain practical engineering value and provides an accurate guidance for the optimization of machine tool stiffness.

show abstract

Identification of mechanical parameters of fiber-reinforced composites by frequency response function approximation method

Cited by 8 publications

References 21 publications

Identification of Damage Size Effect of Natural Frequency on Sandwich Material using Free Vibration Analysis

Identification of Damage Size Effect of Natural Frequency on Sandwich Material using Free Vibration Analysis

Static and dynamic performances of sandwich plates with magnetorheological elastomer core: Theoretical and experimental studies

An identification method of the weak link of stiffness for cantilever beam structure

Contact Info

Product

Resources

About