Mechanical compression and tearing tests are carried out on crimped glass wool samples. The displacement field is determined by using digital image correlation based on images taken at different stages of the mechanical tests. A multi-scale algorithm is used to resolve accurately the fine details of the displacement field. This technique reveals strain heterogeneities and further localization in compression tests well below the peak stress. Crack formations are identified in tearing tests. Reliability and resolution of the displacement and strain fields are validated by using different window sizes in the correlation analysis.
DudderarT. D.SimpkinsP. G.Laser speckle photography in a fluid mediumNature, 1977, 270, 45–47.
4.
DrouillardT. F.A history of acoustic emissionJ. Acoust. Emission, 1996, 14 (1), 1–34.
5.
ISO 3057–1974 NDT-Metallographic Replica Techniques of Surface Examinations, 1974 (International Standardization Organization, Geneva, Switzerland).
6.
RastogiP. K. (Ed.) Photomechanics, 2000 (Springer-Verlag, Berlin, Germany).
7.
JacquotP.FournierJ.-M.(Eds)Interferometry in Speckle Light, Theory and Applications, 2000 (Springer-Verlag, Berlin, Germany).
8.
DawickeD. S.SuttonM. S.CTOA and crack-tunneling measurements in thin sheet 2024-T3 aluminum alloyExpl Mechanics, 1994, 34, 357–368.
9.
HumbertL.ValleV.CottronM.Experimental determination and empirical representation of out-of-plane displacements in a cracked elastic plate loaded in mode IInt. J. Solids Structs, 2000, 37, 5493–5504.
10.
DesruesJ.LanierJ.StutzP.Localization of the deformation in tests on sand samplesEngng Fracture Mechanics, 1985, 21 (4), 251–262.
11.
EN 826 Thermal Insulating Products for Building Applications - Determination of Compression Behaviour, European Standard, 1996.
12.
EN 1607 Thermal Insulating Products for Building Applications - Determination of Tensile Strength Perpendicular to Faces, European Standard, 1996.
13.
CokerE. G.FilonL. N. G.A Treatise on Photoelasticity, 1931 (Cambridge University Press, Cambridge).
14.
BurtP. J.YenC.XuX.Local correlation measures for motion analysis: A comparative study In Proceedings of the IEEE Conference on Pattern Recognition and Image Processing, 1982, pp. 269–274 (IEEE, New York).
15.
BerthaudY.ScholzJ.ThesingJ.Méthodes optiques et acoustiques de mesures des caractéristiques mécaniques In Proceedings of Colloque National on Mécanismes et Mécanique des Grandes Déformations (MECAMAT), 1996, pp. 77–80.
16.
ChiangF. P.WangQ.LehmanF.New developments in full-field strain measurements using speckles In Non-Traditional Methods of Sensing Stress, Strain and Damage in Materials and Structures, 1997, pp. 156–169 (American Society for Testing and Materials, Philadelphia, Pennsylvania).
17.
ChuT. C.RansonW. F.SuttonM. A.PettersW. H.Applications of digital-image-correlation techniques to experimental mechanicsExpl Mechanics, 1985, 3 (25), 232–244.
18.
ChenD. J.ChiangF. P.TanY. S.DonH. S.Digital speckle-displacement measurement using a complex spectrum methodAppl. Optics, 1993, 32, 1839–1849.
19.
PériéJ. N.CallochS.CluzelC.HildF.Analysis of a multiaxial test on a C/C composite by using digital image correlation and a damage modelExpl Mechanics, 2002, 42 (3), 318–328.
20.
MATLAB 5.3, the Language of Technical Computing, version 5.3, 1999 (The MathWorks, Inc., Natick, Massachusetts)
21.
ChevalierL.MarcoY.Tools for multiaxial validation of behavior laws chosen for modelling hyper-elasticity of rubber-like materialsPolym. Engng Sci., 2002, 42 (2), 280–298.
22.
GaborD.Theory of communicationJ. Instn Electl Engrs, 1946, 93 (3), 429–457.
23.
MallatS.A Wavelet Tour of Signal Processing, 1998 (Academic Press, San Diego, California).
ChoiD.ThorpeJ. L.HannaR.Image analysis to measure strain in wood and paperWood Sci. Technol., 1991, 25, 251–262.
26.
SuttonM. A.McNeillS. R.JangJ.BabaiM.Effects of subpixel image restoration on digital correlation error estimatesOpt. Engng, 1988, 27 (10), 870–877.
27.
SuttonM. A.WoltersW. J.PetersW. H.RansonW. F.McNeillS. R.Determination of displacements using an improved digital correlation methodIm. Vis. Comp., 1983, 1 (3), 133–139.
28.
G'SellC.HiverJ.-M.DahnounA.SouahiA.Video-controlled tensile testing of polymers and metals beyond the necking pointJ. Mater. Sci., 1992, 27, 5031–5039.
29.
ChevalierL.CallochS.HildF.MarcoY.Digital image correlation used to analyse the multiaxial behavior of rubber-like materialsEur. J. Mech. A, Solids, 2001, 20, 169–187.
HildF.RakaB.BaudequinM.RouxS.CantelaubeF.Multi-scale displacement field measurements of compressed mineral wool samples by digital image correlationAppl. Optics, 2002, 41 (32), 6815–6828.
