• ANTONIO JOSÉ DA SILVA MACIEL UNICAMP/FEAGRI – Depto. de Máquinas Agrícolas, C.P. 6011 - 13083-875 – Campinas, SP – Brasil.
  • DANIEL ALBIERO UNICAMP/FEAGRI – Depto. de Máquinas Agrícolas, C.P. 6011 - 13083-875 – Campinas, SP – Brasil.
  • INÁCIO MARIA DAL FABBRO UNICAMP/FEAGRI – Depto. de Máquinas Agrícolas, C.P. 6011 - 13083-875 – Campinas, SP – Brasil.



Soil Behavior, Optical Interference, Brazilian Test


This research work reports the application of a shadow moiré technique as a photoelastic method to support a qualitative stress distribution study on soil samples. The knowledge of stress distribution on undisturbed soil is of unquestionable value to tillage purposes as well as to the civil construction
field. The name moiré has its origin in the French language, referring to wave like pattern. When screens of same mesh density are superposed, fringes are generated which move when its relative positions are displaced, it was reported that moiré fringes can be used to magnify displacements, being also suitable as a photoelastic method. The experimental setup for this work included a digital camera to capture the moiré patterns generated for the Ronchi grid and a light source. The images were processed by the softwares named IrfanView, and Idrizi. Five images were taken the sample of clay and they were submitted to varying axial loads kept under the failure stress. Undisturbed samples cylindrical were prepared at the dimensions of 60 mm of height and 60 mm of diameter. Results included the stress distribution maps for each case. It is concluded that the technique get to determine qualitatively the principal stress in soil cylindrical testing specimens.


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CLOUD, G. Optical methods of engineering analysis. Cambridge: CambridgeUniversity Press, 1998. 517p.

FUNG, Y.C. A first course in continuum mecha-nics. New Jersey: Prentice Hall, 1994. 351p.

GILL, W.R.,; VANDENBERG, G.E. Soil dynamic in tillage and traction.Washington, U. S.: Agricul-tural Research Service, United States Depart-ment of Agriculture 1968. 511p.

HILLEL, D. Fundamentals of soil physics. San Diego: Academic Press, 1980. 413p.

HU, Q. 3-D Shape measurement techniques. Available at /Chapter1.htm>, 06/09/2001.KEZDI, A. Handbook of soil mechanics, v. 1 – Soil physics. Amsterdam:Elsevier, 1974. 294p.MALACARA, D. ( Ed.) Optical shop testing. New York: John Wiley & Sons, 1992.

PISAREV, V.S.; BALALOV, V.V. A role of fringe patterns catalogue in the course of interferome-trically based determination of residual stresses by the hole drilling method. Optics and Laser in Engineering, Elsevier, NY, v.41, p. 411- 462, 2004.

POST, D.; HAN, B.; IFJU, P. High sensitivity moiré: experimental analysis for mechanics and materials. New York: Spring-Verlag, 1994. 439p.

SALEH, B.E.A..; TEICH, M.C. Fundamentals of photonics. New York: John Wiley & Sons, 1991. 982p.SOCIEDADE BRASILEIRA DE PROGRESSO DA CIÊNCIA. Cientistas do Brasil. São Paulo: SBPC, 1998. 701p.

UNITED STATE DEPARTMENT OF AGRICUL-TURE (USDA). Soil survey: Manual. Washing-ton: US Gov. Print. Office, 1957. 322p. Hand-book nº 18.

UPADHYAYA, S.K.; CHANCELLOR, W.J.; PERUMPRAL, J.V.; SCHAFER, R.L.; GILL, W.R.; VANDENBERG, G.E. Advances in soil dynamics. St. Joseph: American Society of Agricultural Engineers, 1994. 313p.




How to Cite

MACIEL, A. J. D. S.; ALBIERO, D.; FABBRO, I. M. D. MOIRÉ INTEFEROMETRY APPLIED TO SOIL DYNAMIC STUDIES. Revista Brasileira de Engenharia de Biossistemas, Tupã, São Paulo, Brazil, v. 2, n. 1, p. 81–87, 2008. DOI: 10.18011/bioeng2008v2n1p81-87. Disponível em: Acesso em: 20 oct. 2021.