The use of moiré interferometry as an aid to standard test-method development for textile composite materials

Ifju, Peter; Masters, John E.; Jackson, Wade C.

doi:10.1016/0266-3538(95)00014-3

Cited by 37 publications

(10 citation statements)

References 1 publication

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“…For many textile forms a yarn may contain 1,000 to 12,000 fibers (or even more), and the repeating unit in the textile architecture may have linear dimensions on the order of 1 cm or more. This can pose significant challenges to the experimentalist, even for seemingly routine tests to determine the elastic properties [115,116] using strain gages.…”

Section: Textile Compositesmentioning

confidence: 99%

Recent Applications of Moiré Interferometry

Ifju

Han

2010

Exp Mech

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Moiré interferometry has been a valuable experimental technique for the understanding of the mechanical behavior of materials and structures. Over the last decade less emphasis has been placed on the development of the technique and more towards applications. This paper is a review article on recent applications using moiré interferometry in the fields of microelectronics devices, material characterization, micromechanics, residual stress, composite materials, fracture mechanics, and biomechanics. The general principles of moiré interferometry and advancement of techniques will not be discussed in this text, but references will be provided.

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Section: Textile Compositesmentioning

confidence: 99%

Recent Applications of Moiré Interferometry

Ifju

Han

2010

Exp Mech

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“…Originally, the Cure Reference Method was developed to determine the full-field residual strains that develop as the composite panels cool via moiré interferometer [10][11][12][13]. Moreover, post-gel chemical shrinkage in epoxy was measured using the same methodology [14].…”

Section: Introductionmentioning

confidence: 99%

Shrinkage Measurement in Concrete Materials using Cure Reference Method

2009

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This paper describes the details of using Cure Reference Method (CRM) to determine the shrinkage that develops in concrete materials. The technique involves the replication of diffraction grating on the concrete specimen during curing. After demolded, the specimen is stored in a chamber where a specific drying condition is maintained for 6 days. Every day in this period, the specimen is removed from the chamber and a set of the consecutive moiré fringe patterns are recorded with the help of a specially-designed stage. An automated fringe analysis program is developed to obtain the full-field displacement and strain information. Shrinkage as a function of location, time, and drying conditions is measured. A numerical method is developed in order to obtain material properties from the complex geometry used in the tests. The test in different drying condition and the ring test are performed, and their results are compared with FEA to validate the constructed model.

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“…The cure reference method (CRM) was originally developed for the measurement of residual strains in composites [20][21][22][23]. Moreover, post-gel chemical shrinkage in epoxy has been determined using the same methodology [24].…”

Section: Introductionmentioning

confidence: 99%

Investigation of shrinkage behaviour and cracks in cement paste using moiré interferometry

Chen

Yin

Ifju

2009

The Journal of Strain Analysis for Engineering Design

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This paper focuses on using the cure reference method (CRM), which was previously developed for the measurement of residual strains in composites, to determine the shrinkage that develops in cementitious materials. The experimental technique involves both the replication of diffraction grating on the cement paste specimen during the curing process and the use of high-sensitivity moiré interferometry. An automated fringe analysis system was developed and applied to obtain the full-field displacement and strain information on the surface of the specimen. Overall shrinkage as a function of time, location, and surrounding drying conditions was measured. Moreover, a method of combining CRM and the sealing of the entire specimen was used to investigate the contribution of chemical shrinkage. Chemical shrinkage as a function of water/cement (w/c) ratio, temperature, and time was explored. The experimental results demonstrate the same trends of shrinkage behaviour as documented in the literature. Furthermore, the ring test was performed to investigate shrinkage-induced cracks.

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The use of moiré interferometry as an aid to standard test-method development for textile composite materials

Cited by 37 publications

References 1 publication

Recent Applications of Moiré Interferometry

Recent Applications of Moiré Interferometry

Shrinkage Measurement in Concrete Materials using Cure Reference Method

Investigation of shrinkage behaviour and cracks in cement paste using moiré interferometry

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