The moiré grid-analyzer method for strain analysis
Abstract The complete state of strain throughout an extended field can be determined from a single photograph by the moiré grid-analyzer method. Grids are used for the active, or specimen screen, and for the rigid analyzer screen. Hence, two families of moiré fringes appear simultaneously, providing...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Post, Daniel [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1965 |
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| Schlagwörter: |
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| Anmerkung: |
© Society for Experimental Mechanics, Inc. 1965 |
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| Übergeordnetes Werk: |
Enthalten in: Experimental mechanics - Kluwer Academic Publishers, 1961, 5(1965), 11 vom: Nov., Seite 368-377 |
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| Übergeordnetes Werk: |
volume:5 ; year:1965 ; number:11 ; month:11 ; pages:368-377 |
| Links: |
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| DOI / URN: |
10.1007/BF02326085 |
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| Katalog-ID: |
OLC2058143663 |
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| 520 | |a Abstract The complete state of strain throughout an extended field can be determined from a single photograph by the moiré grid-analyzer method. Grids are used for the active, or specimen screen, and for the rigid analyzer screen. Hence, two families of moiré fringes appear simultaneously, providing displacements inx andy directions throughout the field. Interweaving of moiré fringes so as to disguise the identity of each family is prevented by use of an initial pattern. The initial pattern also eliminates uncertainties in assignment of moiré fringe orders throughout the field, and it provides numerous data points in any local region for reliable evaluation of fringe gradients. A rigorous derivation is presented for interpretation of such patterns in terms of strains. Errors in computed shear strains caused by analyzer misalignment are automatically canceled. The effects of rigid-body rotation of elements within the specimen are routinely eliminated in strain computations. Since calculated strains are independent of analyzer orientation, no fine control of analyzer alignment is required, and small shifts of analyzer position during the experiment are permissible. Accordingly, the moiré grid-analyzer method not only makes possible analysis of problems that previously could not be approached, but also offers vast simplifications for all extended-field moiré analyses. | ||
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10.1007/BF02326085 doi (DE-627)OLC2058143663 (DE-He213)BF02326085-p DE-627 ger DE-627 rakwb eng 690 VZ Post, Daniel verfasserin aut The moiré grid-analyzer method for strain analysis 1965 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Society for Experimental Mechanics, Inc. 1965 Abstract The complete state of strain throughout an extended field can be determined from a single photograph by the moiré grid-analyzer method. Grids are used for the active, or specimen screen, and for the rigid analyzer screen. Hence, two families of moiré fringes appear simultaneously, providing displacements inx andy directions throughout the field. Interweaving of moiré fringes so as to disguise the identity of each family is prevented by use of an initial pattern. The initial pattern also eliminates uncertainties in assignment of moiré fringe orders throughout the field, and it provides numerous data points in any local region for reliable evaluation of fringe gradients. A rigorous derivation is presented for interpretation of such patterns in terms of strains. Errors in computed shear strains caused by analyzer misalignment are automatically canceled. The effects of rigid-body rotation of elements within the specimen are routinely eliminated in strain computations. Since calculated strains are independent of analyzer orientation, no fine control of analyzer alignment is required, and small shifts of analyzer position during the experiment are permissible. Accordingly, the moiré grid-analyzer method not only makes possible analysis of problems that previously could not be approached, but also offers vast simplifications for all extended-field moiré analyses. Shear Strain Single Photograph Analyzer Position Complete State Analyzer Alignment Enthalten in Experimental mechanics Kluwer Academic Publishers, 1961 5(1965), 11 vom: Nov., Seite 368-377 (DE-627)129593990 (DE-600)240480-1 (DE-576)015086852 0014-4851 nnns volume:5 year:1965 number:11 month:11 pages:368-377 https://doi.org/10.1007/BF02326085 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_30 GBV_ILN_70 GBV_ILN_170 GBV_ILN_252 GBV_ILN_2004 GBV_ILN_2015 GBV_ILN_2016 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4309 AR 5 1965 11 11 368-377 |
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10.1007/BF02326085 doi (DE-627)OLC2058143663 (DE-He213)BF02326085-p DE-627 ger DE-627 rakwb eng 690 VZ Post, Daniel verfasserin aut The moiré grid-analyzer method for strain analysis 1965 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Society for Experimental Mechanics, Inc. 1965 Abstract The complete state of strain throughout an extended field can be determined from a single photograph by the moiré grid-analyzer method. Grids are used for the active, or specimen screen, and for the rigid analyzer screen. Hence, two families of moiré fringes appear simultaneously, providing displacements inx andy directions throughout the field. Interweaving of moiré fringes so as to disguise the identity of each family is prevented by use of an initial pattern. The initial pattern also eliminates uncertainties in assignment of moiré fringe orders throughout the field, and it provides numerous data points in any local region for reliable evaluation of fringe gradients. A rigorous derivation is presented for interpretation of such patterns in terms of strains. Errors in computed shear strains caused by analyzer misalignment are automatically canceled. The effects of rigid-body rotation of elements within the specimen are routinely eliminated in strain computations. Since calculated strains are independent of analyzer orientation, no fine control of analyzer alignment is required, and small shifts of analyzer position during the experiment are permissible. Accordingly, the moiré grid-analyzer method not only makes possible analysis of problems that previously could not be approached, but also offers vast simplifications for all extended-field moiré analyses. Shear Strain Single Photograph Analyzer Position Complete State Analyzer Alignment Enthalten in Experimental mechanics Kluwer Academic Publishers, 1961 5(1965), 11 vom: Nov., Seite 368-377 (DE-627)129593990 (DE-600)240480-1 (DE-576)015086852 0014-4851 nnns volume:5 year:1965 number:11 month:11 pages:368-377 https://doi.org/10.1007/BF02326085 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_30 GBV_ILN_70 GBV_ILN_170 GBV_ILN_252 GBV_ILN_2004 GBV_ILN_2015 GBV_ILN_2016 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4309 AR 5 1965 11 11 368-377 |
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10.1007/BF02326085 doi (DE-627)OLC2058143663 (DE-He213)BF02326085-p DE-627 ger DE-627 rakwb eng 690 VZ Post, Daniel verfasserin aut The moiré grid-analyzer method for strain analysis 1965 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Society for Experimental Mechanics, Inc. 1965 Abstract The complete state of strain throughout an extended field can be determined from a single photograph by the moiré grid-analyzer method. Grids are used for the active, or specimen screen, and for the rigid analyzer screen. Hence, two families of moiré fringes appear simultaneously, providing displacements inx andy directions throughout the field. Interweaving of moiré fringes so as to disguise the identity of each family is prevented by use of an initial pattern. The initial pattern also eliminates uncertainties in assignment of moiré fringe orders throughout the field, and it provides numerous data points in any local region for reliable evaluation of fringe gradients. A rigorous derivation is presented for interpretation of such patterns in terms of strains. Errors in computed shear strains caused by analyzer misalignment are automatically canceled. The effects of rigid-body rotation of elements within the specimen are routinely eliminated in strain computations. Since calculated strains are independent of analyzer orientation, no fine control of analyzer alignment is required, and small shifts of analyzer position during the experiment are permissible. Accordingly, the moiré grid-analyzer method not only makes possible analysis of problems that previously could not be approached, but also offers vast simplifications for all extended-field moiré analyses. Shear Strain Single Photograph Analyzer Position Complete State Analyzer Alignment Enthalten in Experimental mechanics Kluwer Academic Publishers, 1961 5(1965), 11 vom: Nov., Seite 368-377 (DE-627)129593990 (DE-600)240480-1 (DE-576)015086852 0014-4851 nnns volume:5 year:1965 number:11 month:11 pages:368-377 https://doi.org/10.1007/BF02326085 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_30 GBV_ILN_70 GBV_ILN_170 GBV_ILN_252 GBV_ILN_2004 GBV_ILN_2015 GBV_ILN_2016 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4309 AR 5 1965 11 11 368-377 |
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10.1007/BF02326085 doi (DE-627)OLC2058143663 (DE-He213)BF02326085-p DE-627 ger DE-627 rakwb eng 690 VZ Post, Daniel verfasserin aut The moiré grid-analyzer method for strain analysis 1965 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Society for Experimental Mechanics, Inc. 1965 Abstract The complete state of strain throughout an extended field can be determined from a single photograph by the moiré grid-analyzer method. Grids are used for the active, or specimen screen, and for the rigid analyzer screen. Hence, two families of moiré fringes appear simultaneously, providing displacements inx andy directions throughout the field. Interweaving of moiré fringes so as to disguise the identity of each family is prevented by use of an initial pattern. The initial pattern also eliminates uncertainties in assignment of moiré fringe orders throughout the field, and it provides numerous data points in any local region for reliable evaluation of fringe gradients. A rigorous derivation is presented for interpretation of such patterns in terms of strains. Errors in computed shear strains caused by analyzer misalignment are automatically canceled. The effects of rigid-body rotation of elements within the specimen are routinely eliminated in strain computations. Since calculated strains are independent of analyzer orientation, no fine control of analyzer alignment is required, and small shifts of analyzer position during the experiment are permissible. Accordingly, the moiré grid-analyzer method not only makes possible analysis of problems that previously could not be approached, but also offers vast simplifications for all extended-field moiré analyses. Shear Strain Single Photograph Analyzer Position Complete State Analyzer Alignment Enthalten in Experimental mechanics Kluwer Academic Publishers, 1961 5(1965), 11 vom: Nov., Seite 368-377 (DE-627)129593990 (DE-600)240480-1 (DE-576)015086852 0014-4851 nnns volume:5 year:1965 number:11 month:11 pages:368-377 https://doi.org/10.1007/BF02326085 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_30 GBV_ILN_70 GBV_ILN_170 GBV_ILN_252 GBV_ILN_2004 GBV_ILN_2015 GBV_ILN_2016 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4309 AR 5 1965 11 11 368-377 |
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10.1007/BF02326085 doi (DE-627)OLC2058143663 (DE-He213)BF02326085-p DE-627 ger DE-627 rakwb eng 690 VZ Post, Daniel verfasserin aut The moiré grid-analyzer method for strain analysis 1965 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Society for Experimental Mechanics, Inc. 1965 Abstract The complete state of strain throughout an extended field can be determined from a single photograph by the moiré grid-analyzer method. Grids are used for the active, or specimen screen, and for the rigid analyzer screen. Hence, two families of moiré fringes appear simultaneously, providing displacements inx andy directions throughout the field. Interweaving of moiré fringes so as to disguise the identity of each family is prevented by use of an initial pattern. The initial pattern also eliminates uncertainties in assignment of moiré fringe orders throughout the field, and it provides numerous data points in any local region for reliable evaluation of fringe gradients. A rigorous derivation is presented for interpretation of such patterns in terms of strains. Errors in computed shear strains caused by analyzer misalignment are automatically canceled. The effects of rigid-body rotation of elements within the specimen are routinely eliminated in strain computations. Since calculated strains are independent of analyzer orientation, no fine control of analyzer alignment is required, and small shifts of analyzer position during the experiment are permissible. Accordingly, the moiré grid-analyzer method not only makes possible analysis of problems that previously could not be approached, but also offers vast simplifications for all extended-field moiré analyses. Shear Strain Single Photograph Analyzer Position Complete State Analyzer Alignment Enthalten in Experimental mechanics Kluwer Academic Publishers, 1961 5(1965), 11 vom: Nov., Seite 368-377 (DE-627)129593990 (DE-600)240480-1 (DE-576)015086852 0014-4851 nnns volume:5 year:1965 number:11 month:11 pages:368-377 https://doi.org/10.1007/BF02326085 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC SSG-OLC-PHY GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_30 GBV_ILN_70 GBV_ILN_170 GBV_ILN_252 GBV_ILN_2004 GBV_ILN_2015 GBV_ILN_2016 GBV_ILN_2020 GBV_ILN_4046 GBV_ILN_4309 AR 5 1965 11 11 368-377 |
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Experimental mechanics |
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Experimental mechanics |
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eng |
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600 - Technology |
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1965 |
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368 |
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Post, Daniel |
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5 |
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690 VZ |
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Aufsätze |
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Post, Daniel |
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10.1007/BF02326085 |
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690 |
| title_sort |
the moiré grid-analyzer method for strain analysis |
| title_auth |
The moiré grid-analyzer method for strain analysis |
| abstract |
Abstract The complete state of strain throughout an extended field can be determined from a single photograph by the moiré grid-analyzer method. Grids are used for the active, or specimen screen, and for the rigid analyzer screen. Hence, two families of moiré fringes appear simultaneously, providing displacements inx andy directions throughout the field. Interweaving of moiré fringes so as to disguise the identity of each family is prevented by use of an initial pattern. The initial pattern also eliminates uncertainties in assignment of moiré fringe orders throughout the field, and it provides numerous data points in any local region for reliable evaluation of fringe gradients. A rigorous derivation is presented for interpretation of such patterns in terms of strains. Errors in computed shear strains caused by analyzer misalignment are automatically canceled. The effects of rigid-body rotation of elements within the specimen are routinely eliminated in strain computations. Since calculated strains are independent of analyzer orientation, no fine control of analyzer alignment is required, and small shifts of analyzer position during the experiment are permissible. Accordingly, the moiré grid-analyzer method not only makes possible analysis of problems that previously could not be approached, but also offers vast simplifications for all extended-field moiré analyses. © Society for Experimental Mechanics, Inc. 1965 |
| abstractGer |
Abstract The complete state of strain throughout an extended field can be determined from a single photograph by the moiré grid-analyzer method. Grids are used for the active, or specimen screen, and for the rigid analyzer screen. Hence, two families of moiré fringes appear simultaneously, providing displacements inx andy directions throughout the field. Interweaving of moiré fringes so as to disguise the identity of each family is prevented by use of an initial pattern. The initial pattern also eliminates uncertainties in assignment of moiré fringe orders throughout the field, and it provides numerous data points in any local region for reliable evaluation of fringe gradients. A rigorous derivation is presented for interpretation of such patterns in terms of strains. Errors in computed shear strains caused by analyzer misalignment are automatically canceled. The effects of rigid-body rotation of elements within the specimen are routinely eliminated in strain computations. Since calculated strains are independent of analyzer orientation, no fine control of analyzer alignment is required, and small shifts of analyzer position during the experiment are permissible. Accordingly, the moiré grid-analyzer method not only makes possible analysis of problems that previously could not be approached, but also offers vast simplifications for all extended-field moiré analyses. © Society for Experimental Mechanics, Inc. 1965 |
| abstract_unstemmed |
Abstract The complete state of strain throughout an extended field can be determined from a single photograph by the moiré grid-analyzer method. Grids are used for the active, or specimen screen, and for the rigid analyzer screen. Hence, two families of moiré fringes appear simultaneously, providing displacements inx andy directions throughout the field. Interweaving of moiré fringes so as to disguise the identity of each family is prevented by use of an initial pattern. The initial pattern also eliminates uncertainties in assignment of moiré fringe orders throughout the field, and it provides numerous data points in any local region for reliable evaluation of fringe gradients. A rigorous derivation is presented for interpretation of such patterns in terms of strains. Errors in computed shear strains caused by analyzer misalignment are automatically canceled. The effects of rigid-body rotation of elements within the specimen are routinely eliminated in strain computations. Since calculated strains are independent of analyzer orientation, no fine control of analyzer alignment is required, and small shifts of analyzer position during the experiment are permissible. Accordingly, the moiré grid-analyzer method not only makes possible analysis of problems that previously could not be approached, but also offers vast simplifications for all extended-field moiré analyses. © Society for Experimental Mechanics, Inc. 1965 |
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The moiré grid-analyzer method for strain analysis |
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