Piezoelectric sensor for stress intensity factor measurement of two dimensional cracks

Fujimoto, Yukio; Shintaku, Eiji; Pirker, Gernot; Liu, Gang

doi:10.1016/s0013-7944(02)00091-7

Cited by 22 publications

(10 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In order to make piezoelectric/piezomagnetic materials to have high strength, high reliability and long lifetime, the behaviors of cracks in brittle piezoelectric/piezomagnetic structures have to be understood and described [2]. This has motivated the investigations of fracture mechanics of piezoelectric/piezomagnetic materials [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17], and many important achievements have been made over the course of many years.…”

Section: Introductionmentioning

confidence: 99%

Solutions to a limited-permeable crack or two limited-permeable collinear cracks in piezoelectric/piezomagnetic materials

Zhou

Zhang

2007

Arch Appl Mech

View full text Add to dashboard Cite

The solutions of a limited-permeable crack (case I) or two collinear limited-permeable cracks (case II) in piezoelectric/piezomagnetic materials subjected to a uniform tension loading were investigated in this paper using the generalized Almansi's theorem. At the same time, the electric permittivity and the magnetic permeability of air in crack were firstly considered. Through the Fourier transform, the problem can be solved with the help of two pairs of dual integral equations, in which the unknown variables were jumps of displacements across crack surfaces, not the dislocation density functions or the complex variable functions. To solve the dual integral equations, the jumps of displacements across crack surfaces were directly expanded in a series of Jacobi polynomials to obtain the relations among electric displacement intensity factors, magnetic flux intensity factors and stress intensity factors at crack tips.

show abstract

Section: Introductionmentioning

confidence: 99%

Solutions to a limited-permeable crack or two limited-permeable collinear cracks in piezoelectric/piezomagnetic materials

Zhou

Zhang

2007

Arch Appl Mech

View full text Add to dashboard Cite

show abstract

“…The analysis used here follows the method described by Fujimoto [4, 5] to relate the measured voltage output of MFC patches to the SIF because of a fatigue crack. By using two MFC patches, we will be able to measure both mode 1 and mode 2 SIFs simultaneously.…”

Section: Stress Intensity Factorsmentioning

confidence: 99%

“…The goal here is to determine the practical obstacles and the potential benefits of the proposed multifaceted approach to SHM using a simple beam specimen. Fujimoto [4, 5] showed that it is possible to measure SIFs directly using monolithic piezoelectric material; however, this material is brittle and labour intensive to prepare usable sizes. In addition, monolithic piezoelectric materials may have an issue with the lack of durability.…”

Section: Modellingmentioning

confidence: 99%

“…By relating voltage output of MFC to strain, this research set the stage for the later development of SIF measurement using piezoelectric polymers. Finally, in a study by Fujimoto [4, 5], a method of measuring the SIF of a cracked structural member was developed. The voltage output of piezoelectric elements is related to the stress field at the crack tip and is then used to accurately predict the SIF of the structure.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fatigue Life Estimation of Structural Components Using Macrofibre Composite Sensors

Butrym

Kim

Inman³

2011

Strain

View full text Add to dashboard Cite

Recently, a number of different structural health monitoring (SHM) techniques have been developed for the online inspection of air, land and sea engineering structures. Various smart materials are employed for detecting eminent damage in situ. Fatigue cracks in structural components are the most common cause of structural failure when exposed to fatigue loading. Fatigue design of structural components is typically accomplished either using a set of stress cycle (S‐N) data obtained from prior fatigue tests or using the fracture mechanics approach. The fracture mechanics approach considers the fatigue life of structures as a summation of crack initiation life and crack propagation life. The stress intensity factor (SIF) is required for the estimation of fatigue crack propagation life from the linear elastic fracture mechanics (LEFM) perspective. However, the accurate prediction of the SIF is difficult especially when the geometry or the boundary conditions of a structure becomes complex. In this study, a SHM application of macrofibre composite (MFC) sensors is presented. A set of MFC sensors is used for the real‐time measurement of the SIF. The measured values of the SIF are later used for the prediction of the crack propagation life. The impedance‐based SHM technique using the same set of MFC sensors is employed for the detection of crack initiation life.

show abstract

“…When used as sensors, two measurement conditions are usually performed. The first consists in measuring the electric charge or the electric current generated by the piezoelectric material [5]. The second possibility is to measure the electric potential between the electrodes of the piezoelectric sensor [1].…”

Section: Introductionmentioning

confidence: 99%

Monitoring Fatigue Crack Growth in Compact Tension Specimens Using Piezoelectric Sensors

Gama

Morikawa

2007

Exp Mech

View full text Add to dashboard Cite

This paper aims to report the results of an experimental study on the application of piezoelectric dynamic strain sensors for crack length measurement in fracture mechanics specimens. The performance of the piezoelectric sensors was assessed through fatigue crack propagation tests in compact tension (CT) specimens. Sensors of polarized polyvinilidene fluoride polymer (PVDF) were bonded to the back face of CT specimens, in the same manner as the electrical resistance strain gages installed for crack length measurement in the back face strain technique. The results showed that, mainly due to its high sensitivity to strain, the use of piezoelectric materials as dynamic strain sensors can contribute to the experimental investigation in the field of fracture mechanics.

show abstract

Piezoelectric sensor for stress intensity factor measurement of two dimensional cracks

Cited by 22 publications

References 17 publications

Solutions to a limited-permeable crack or two limited-permeable collinear cracks in piezoelectric/piezomagnetic materials

Solutions to a limited-permeable crack or two limited-permeable collinear cracks in piezoelectric/piezomagnetic materials

Fatigue Life Estimation of Structural Components Using Macrofibre Composite Sensors

Monitoring Fatigue Crack Growth in Compact Tension Specimens Using Piezoelectric Sensors

Contact Info

Product

Resources

About