METHOD FOR THE OPTIMIZATION OF STRESS DISTRIBUTION IN ACOUSTIC THERMOGRAPHY APPLICATIONS
First Claim
1. A method for the optimization of stress distribution on an object to be tested for defects using ultrasound excitation and evaluation on the basis of a resulting surface temperature distribution, with the following steps:
- performing a simulation on a Computer Aided Design (CAD) model of the object under test conditions prior to testing an object,calculating vibrational spectra and modal vibrational forms,determining local mechanical stresses from the vibrational modes in each instance, whereinmodes to be excited for the real test being selected from the entirety of the occurring modes such thatthe mechanical stress lies in a selected region above a predetermined minimum stress in order to enable a reliable proof of defect, andthe mechanical stress in all other regions of the inspection part is smaller than a predetermined maximum stress by a predetermined factor in order not to damage the component at weak points.
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Accused Products
Abstract
In a method for the optimization of stress distribution on an object to be tested for flaws by ultrasound excitation and evaluation based on resulting surface temperature distribution, —a simulation is performed under test conditions on a CAD model of the object prior to a testing an object, —vibrational spectra and modal vibrational forms are calculated, —local mechanical stresses are determined from the vibrational modes, whereby—modes to be excited for the real test are selected from the entirety of the occurring modes such that, —the mechanical stress lies in a selected region above a predetermined minimum stress to enable a reliable proof of defect, —the mechanical stress in all other regions of the inspection part, in particular on easily damaged component structures, is smaller than a predetermined maximum stress by a predetermined factor, in order not to damage the component at weak points.
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Citations
18 Claims
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1. A method for the optimization of stress distribution on an object to be tested for defects using ultrasound excitation and evaluation on the basis of a resulting surface temperature distribution, with the following steps:
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performing a simulation on a Computer Aided Design (CAD) model of the object under test conditions prior to testing an object, calculating vibrational spectra and modal vibrational forms, determining local mechanical stresses from the vibrational modes in each instance, wherein modes to be excited for the real test being selected from the entirety of the occurring modes such that the mechanical stress lies in a selected region above a predetermined minimum stress in order to enable a reliable proof of defect, and the mechanical stress in all other regions of the inspection part is smaller than a predetermined maximum stress by a predetermined factor in order not to damage the component at weak points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for the optimization of stress distribution on an object to be tested for defects using ultrasound excitation and evaluation on the basis of a resulting surface temperature distribution, comprising:
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means for performing a simulation on a Computer Aided Design (CAD) model of the object under test conditions prior to testing an object, means for calculating vibrational spectra and modal vibrational forms, means for determining local mechanical stresses from the vibrational modes in each instance, wherein modes to be excited for the real test being selected from the entirety of the occurring modes such that the mechanical stress lies in a selected region above a predetermined minimum stress in order to enable a reliable proof of defect, and the mechanical stress in all other regions of the inspection part is smaller than a predetermined maximum stress by a predetermined factor in order not to damage the component at weak points. - View Dependent Claims (10, 11, 12, 13, 14, 15, 18)
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Specification