Fracture process zone analysis of concrete using moiré interferometry

He, Shiquan; Feng, Zengming; Rowlands, R. E.

doi:10.1007/bf02317433

Cited by 27 publications

(6 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The maximum length of the fully developed FPZ was approximately 90 mm, which is in excellent agreement with the results of Hadjab et al, who used acoustic emission [6] and scanning electron microscopy [56]. However, the length of the FPZ may be dependent on size and geometry [3] and may also be influenced by aggregate characteristics [15].…”

Section: The Crack Length and Length Of The Fpzsupporting

confidence: 87%

“…Many efforts have been made in recent decades to characterise the FPZ in concrete in terms of the extent of the FPZ [2][3][4][5][6], the formation and propagation of the FPZ [7][8][9], size effect of the FPZ [3,10] and other properties of the FPZ [11][12][13][14][15]. Despite countless research efforts on the FPZ, there are still numerous uncertainties, such as the energyconsuming mechanism of the FPZ and the crack advance length, which prevent the establishment of effective fracture mechanics parameters for concrete [16].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tension softening curves of plain concrete

Chen

2013

Construction and Building Materials

View full text Add to dashboard Cite

The tension softening curves (TSCs) of plain concrete with compressive strengths varying between 40 and 90 MPa were estimated by performing three-point bending tests on pre-notched beams. Crack evolution and full-field deformation in the beams were measured using the electronic speckle pattern interferometry technique. The crack characteristics, including the crack opening displacement profiles, the width of the fracture process zone and the length of the crack, were evaluated. By using a newly developed incremental displacement collocation method, the TSCs of plain concrete were determined. To facilitate the use of TSCs by commercial finite element packages, the estimated TSCs were simplified to bilinear and exponential curves, and the related parameters were determined.

show abstract

Section: The Crack Length and Length Of The Fpzsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Tension softening curves of plain concrete

Chen

2013

Construction and Building Materials

View full text Add to dashboard Cite

show abstract

“…Several experimental works based on mixed mode fracture of concrete and similar materials have been performed by Kazemi and Vossoughi Shahvaril (2004), Gálvez et al (1998Gálvez et al ( , 2002, Swartz et al (1988) and Jenq and Shah (1988). Some of them were developed using different experimental methods for quantifying fracture phenomena, being based on optical methods such as moiré interferometry by He et al (1997), electronic speckle pattern interferometry by Li et al (2009) and Richter et al (1988) and acoustic emission by Ohtsu et al (1999).…”

mentioning

confidence: 99%

Experimental investigation of mixed-mode-I/II fracture in polymer mortars using digital image correlation method

Nunes

Reis

2014

Lat. Am. j. solids struct.

View full text Add to dashboard Cite

The purpose of this work is to investigate experimentally the effects of mixed-mode I/II loading on the fracture behavior of polymer mortars. Three point bend beam specimens with offcenter notch were used in plane-strain fracture toughness tests. Two approaches have been simultaneously used to determine the crack opening displacements. The crack mouth opening displacement was measured by means of a clip gauge, while the crack tip opening displacement was estimated through the Digital Image Correlation method. Fracture parameters, such as critical values of crack opening displacement, energy release rate and mixed-mode stress intensity factor were estimated. In addition, the values of crack mouth opening displacement and crack tip opening displacement were used to evaluate the rotational factor. Finally, the effect of sliding mode-II in fracture was not easily observed using clip gage, however this effect was noticed employing Digital Image Correlation method.

show abstract

“…For instance, Ibraham and Luxmoore [11] used moiré patterns produced by linear grating to measure crack width. The moiré interferometry method has been used by several authors for studying fracture in concrete [12][13]. Fantilli et al [14] used geometric moiré, in addition to transducers and strain gages to study the transition from uncracked to cracked phase in lightly reinforced concrete beams.…”

Section: Introductionmentioning

confidence: 99%

Crack displacement sensing and measurement in concrete using circular grating moire fringes and pattern matching

2008

View full text Add to dashboard Cite

The moiré method has been extensively studied in the past and applied in various engineering applications. Several techniques are available for generating the moiré fringes in these applications, which include moiré interferometry, projection moiré, shadow moiré, moiré deflectometry etc. Most of these methods use the superposition of linear gratings to generate the moiré patterns. The use of non-linear gratings, such as circular, radial and elongated gratings has received less attention from the research community. The potential of non-linear gratings in engineering measurement has been realized in a limited number of applications, such as rotation measurement, measurement of linear displacement, measurement of expansion coefficients of materials and measurement of strain distribution. In this work, circular gratings of different pitch were applied to the sensing and measurement of crack displacement in concrete structures. Gratings of pitch 0.50 mm and 0.55 mm were generated using computer software and attached to two overlapping acrylic plates that were bonded to either side of the crack. The resulting moiré patterns were captured using a standard digital camera and compared with a set of reference patterns generated using a precision positioning stage. Using several image pre-processing stages, such as filtering and morphological operations, and pattern matching the magnitude displacements along two orthogonal axes can be detected with a resolution of 0.05 mm.

show abstract

Fracture process zone analysis of concrete using moiré interferometry

Cited by 27 publications

References 25 publications

Tension softening curves of plain concrete

Tension softening curves of plain concrete

Experimental investigation of mixed-mode-I/II fracture in polymer mortars using digital image correlation method

Crack displacement sensing and measurement in concrete using circular grating moire fringes and pattern matching

Contact Info

Product

Resources

About