Publication Date:
2019-07-12
Description:
In new method of determining load on specimen, direction of stress wave propagation measured by array of acoustic sensors attached to specimen. Responses of sensors analyzed by strain-energy-density calculations to calculate load. Change in anisotropy of elasticity caused by applied load and corresponding induced strain. Is means to monitor applied load corresponding to measurable shift in direction of propagation of stress wave. Monitoring device based on this method made integral part of airframe in which unidirectional section of structure, such as spar cap or longeron, carries primary load.
Keywords:
MECHANICS
Type:
LAR-14399
,
NASA Tech Briefs (ISSN 0145-319X); 17; 7; P. 72
Format:
text
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