An External Interface for Processing 3-D Holographic and by Werner Jüptner, Thomas Kreis

By Werner Jüptner, Thomas Kreis

Internationally well-known specialists within the box of holographic interferometric trying out, X-ray trying out, and structural research by way of finite point thoughts have come jointly in ESPRIT venture 898 to enhance a approach that integrates those thoughts. the program acts as an exterior interface among the complementary nondestructive trying out tools and laptop established structural research. within the booklet the checking out and research suggestions are awarded and in comparison with distinctive emphasis on difficulties concerning their mix and integration. The structure and the elements of the interface process are defined. Experiments proving the feasibility and applicability of the ideas are provided. The chapters of the e-book facing the several recommendations are written by way of the person companions of the undertaking. a standard try item is investigated through all thoughts. The booklet is helping the buyer to pick the trying out and research approach most fitted for his challenge. It additionally provides the heritage for build up built-in trying out gear for research and control.

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25) is shown in Fig. 15. The origins of individual lines are slightly shifted to produce a perspec- tive effect. Remarkable is the poor contrast in the edges of the patterns and the reliable interference phase distribution even in these areas. ---'----r---' ORT -177. fill 5ELEUCHTUHGSPUNKT 5E08RCHTUH~SPUHKT I IIELLENLREH~E Y-KOORO. OER EINSPRNNUHG: RUSVERTUNG VON UNO VON BERECH-IET : VERSCH. 8 MICROM. MM MM MM HI CRaM. GRRD Fig. 13: Crack induced deformation of tensile test specimen calculated from interference phase distribution by least squares method 35 Fig.

The inverse Fourier-transform applied to this (:(u,v) results in the complex C(x,y): Now pointwisely imaginary part of the the complex logarithm of C(x,y) is determined, giving the interference phase 4t;J(x,y). 34) I This interference phase distribution again only has values between +1[". and The discontinuities are the same as they occur with the phase-step me- thod. 18). This uncertainty may be resolved by using one second interferogram with a mutual phase shift, whose exact be ~ unknown /16/.

Also form a list of nodes lying on the surface represented by the image. 6) Use the transformation defined by 4) to convert each of the surface nodes to positions on the image, and interpolate for the displacements this creates further input for MELINA. 7) Run the analysis program MELINA. 7 Analysis of Honeycomb Panel The object chosen for investigation by all partners was of a composite nel, consisting of pa- surface layers of carbon-fibre reinforced plastic and an internal structure of an aluminium honeycomb.

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