NONDESTRUCTIVE EVALUATION OF FINGER JOINT STRENGTH

Award Information
Agency:
Department of Agriculture
Branch
n/a
Amount:
$200,000.00
Award Year:
1991
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
10962
Agency Tracking Number:
10962
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
4700 Mcmurray Avenue, Fort Collins, CO, 80525
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Ronald W. Anthony
() -
Business Contact:
() -
Research Institute:
n/a
Abstract
CURRENTLY, NO METHOD EXISTS WHICH CAN RELIABLY DETERMINE THE TENSILE STRENGTH OF AN ADHESIVE-BONDED FINGER JOINT USING NONDESTRUCTIVE PROCEDURES ONLY. THE USE OF ACOUSTO-ULTRASONIC NONDESTRUCTIVE EVALUATION WILL BE INVESTIGATED FOR THE FEASIBILITY OF PROVIDING STRESS WAVE PARAMETERS WHICH CAN BE CORRELATED WITH JOINT TENSILE STRENGTH TO DEVELOP PREDICTIVE EQUATIONS. THE PROCEDURE WILL FOCUS ON DELIVERING BROADBAND FREQUENCY PULSES ACROSS THE FINGER JOINT AND CONDUCTING TIME SERIES AND SPECTRAL ANALYSIS ON THE RESULTING STRESS WAVE. STRESS WAVE PARAMETERS WILL BE CORRELATED TO THE RESULTS OF DESTRUCTIVE TENSION TESTS USING LINEAR AND NONLINEAR REGRESSION TECHNIQUES TO DEVELOP A MATHEMATICAL MODEL FOR PREDICTING INDIVIDUAL FINGER JOINT STRENGTH. THE FEASIBILITY OF THE RESULTING MODEL WILL BE VERIFIED ON AN INDEPENDENT SET OF DATA. DEVELOPMENT OF AN ACOUSTO-ULTRASONIC NONDESTRUCTIVE EVALUATION PROCEDURE FOR FINGER JOINT STRENGTH IN STRUCTURALWOOD MEMBERS WILL PROVIDE FOR CONFIDENCE IN PRODUCT PERFORMANCE THROUGH IMPROVED QUALITY ASSURANCE PROGRAMS.

* information listed above is at the time of submission.

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