By Werner Jüptner, Thomas Kreis
Internationally well-known specialists within the box of holographic interferometric checking out, X-ray checking out, and structural research by way of finite aspect thoughts have come jointly in ESPRIT venture 898 to enhance a process that integrates those recommendations. the program acts as an exterior interface among the complementary nondestructive trying out equipment and desktop dependent structural research. within the ebook the trying out and research ideas are provided and in comparison with precise emphasis on difficulties relating to their mixture and integration. The structure and the elements of the interface approach are defined. Experiments proving the feasibility and applicability of the techniques are provided. The chapters of the booklet facing the various innovations are written via the person companions of the undertaking. a typical try out item is investigated through all strategies. The booklet is helping the client to choose the checking out and research process best suited for his challenge. It additionally provides the heritage for increase built-in checking out gear for research and control.
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Extra resources for An External Interface for Processing 3-D Holographic and X-Ray Images
The Fourier-transform makes backmethod full use of all intensity values at all pixels when calculating each spatial frequency component and in the same way uses all spatial components frequency in the inverse transform and calculating the interference phase at each pixel. So it can be regarded as a global procedure while se-step method is a local procedure. the pha- 39 The software performing the interference phase determination by the Fou- rier-transform method uses the forward and two-dimensional Fourier-transform in the the backward direction.
Confir- Prescribed displacements have been applied to a finite element model of a turbine blade. In the test the prescribed displacements have been de- rived from the finite element model under a certain loading condition. Sensitivity studies WeTe carried out to determine how much ment of the displace- field had to be used as prescribed displacements at selected nodes of the finite element model. This was done to obtain an idea of the amount prescribed displac~ment data of required to match the original displacement field.
L2h. Although a varying background intensity, ing contrast and vary- local saturation in the recorded intensities occur, the evaluated interference phase distribution is clean and smooth. The changes of slope, decreasing to increasing and vice versa, are uniquely detected . 31 Fig. 14) has to be inverted pointwise- ly. But for properly known structures and for have calculation of loading types, another method the displacement field can be applied. This method is based on the Gaussian least squares technique and is used here for further evaluation of the tensile test specimen.
An External Interface for Processing 3-D Holographic and X-Ray Images by Werner Jüptner, Thomas Kreis