Abstract
The research work presented in this paper deals with the determination of the stress concentration at the root of the fillet of a weldment on a T steel specimen. A finite element model was developed for the specimen. Measurements were carried out using the holographic moiré technique. Strain gages were added to evaluate extrapolation techniques proposed in the literature. Good agreement was found between the finite element results and the optically measured values. The strain gage extrapolation technique yielded very low values.
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Abbreviations
- a ij :
-
direction cosines of the local coordinate system with respect to the fixed coordinate system
- d :
-
displacement vector
- n :
-
fringe ordern=1,2,3, ...
- u, v, w :
-
projections of the displacement vector on the fixed coordinate system
- S :
-
sensitivity vector, in this case a vector along the coordinate axis of the fixed coordinate system
- α:
-
angle that the direction of illumination makes with the direction of observation
- ɛ ij :
-
strains in the local coordinate system
- ɛ0θ ij :
-
strains in the fixed coordinate system
- ɛθ :
-
strains along the local θ-axis of reference
- λ:
-
wavelength of light, λ=0.6328μm
- θ:
-
angle of the tangent to the circular directrix of the notch surface and the fixedx-axis
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Sciammarella, C.A., Singh, B., Trentadue, B. et al. Stress analysis of weldments by holographic moiré and the finite element method. Experimental Mechanics 40, 15–21 (2000). https://doi.org/10.1007/BF02327543
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DOI: https://doi.org/10.1007/BF02327543