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System and method for determining crack propagation length in a structure using acoustic signature-based techniques

A technology of crack propagation and acoustic characteristics, applied in the analysis of solids using sound waves/ultrasonic waves/infrasonic waves, material analysis using sound waves/ultrasonic waves/infrasonic waves, scientific instruments, etc., can solve problems such as difficult to determine or measure crack lengths

Active Publication Date: 2022-04-12
LIVERMORE SOFTWARE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, it is often difficult to physically determine or measure the length of a crack, especially when the crack propagates inward within the structure

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  • System and method for determining crack propagation length in a structure using acoustic signature-based techniques
  • System and method for determining crack propagation length in a structure using acoustic signature-based techniques
  • System and method for determining crack propagation length in a structure using acoustic signature-based techniques

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Embodiment Construction

[0018] referenced in this article Figure 1A-6 Embodiments of the invention are discussed. However, those skilled in the art will readily appreciate that the detailed description given herein with reference to the accompanying figures is for explanatory purposes and that the invention extends beyond these limited embodiments.

[0019] first reference Figure 1A , which shows a flowchart of an exemplary process 100 for determining an unknown crack growth length within a structure using acoustic signature-based techniques. Process 100 begins at act 102 by measuring and recording acoustic characteristics at a first location (ie, a sound receiving location) via acoustic / sound waves generated by vibrations of a structure. The structure contains crack propagation of unknown length within the structure. The vibration of the structure is caused by a harmonic load of predefined magnitude (eg, a sinusoidal load of a specific frequency) applied at a second location of the structure (ie...

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Abstract

Methods and systems for determining crack growth length using acoustic signature-based techniques are disclosed. Acoustic signatures are measured and recorded at the first location via sound waves generated by structural vibrations caused by harmonic loads with predefined amplitudes acting at the second location on the structure. The interior of the structure contains crack propagation of unknown length. The unknown length is determined by comparing measured and recorded acoustic signatures with numerically calculated acoustic signatures stored in a database containing numerically calculated acoustic signatures and numerically simulated crack growth trajectories At least one relationship of the corresponding crack growth lengths of the various stages of . Numerical calculations are obtained by performing numerical time-marching simulations to obtain numerically simulated crack growth trajectories, and by performing SSD analysis and vibroacoustic analysis of structures to obtain numerically calculated acoustic characterization of various stages of numerically simulated crack growth trajectories acoustic characteristics.

Description

technical field [0001] The present invention relates generally to determining crack growth length in structures, and more particularly to systems and methods for determining crack growth length in structures using acoustic signature-based techniques (eg, audio frequency response functions). Background technique [0002] It is well known that structures can develop cracks under cyclic loading. Sources of cyclic loading may be from normal operation or vibration during transport. Once a crack begins to develop, the crack may propagate due to many possible factors including, but not limited to, sustained operating loads, combined effects of environment and / or temperature, and the like. In some extreme cases, cracks can grow so far that the structure fails. Therefore, it is crucial to monitor the development and propagation of cracks in structures to ensure that structural integrity is maintained. [0003] With the advent of various engineering disciplines, there are several t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/44
CPCG01N29/4427G01N2291/023G01N29/045G01N29/07G01N29/348G01N29/4454G01N29/46G01N29/12G01N29/44
Inventor 黄云
Owner LIVERMORE SOFTWARE TECH