Publications & Standards

Detecting Substandard, Nonconforming, Improperly Processed and Counterfeit Materiel

2020

This report presents the motivation, background, methods and results of a Small Business Technology Transfer (STTR) project that developed and demonstrated production-level approaches for using Process Compensated Resonance Testing (PCRT) to detect counterfeit, substandard, nonconforming, and improperly processed materiel for the Defense Logistics Agency (DLA)

Characterizing Polymer O-Rings Nondestructively using Resonant Ultrasound Spectroscopy

2019

Polymer O-rings are an essential part of many designs, including mission and safety critical systems. Currently, there are no accurate destructive tests for measuring the polymer properties of O-rings (e.g. durometer), let alone nondestructive methods. As such, it is difficult to identify substandard, nonconforming, improperly processed or counterfeit O-rings. This work combines resonant ultrasound spectroscopy (RUS) with machine learning and predictive analytics to sort O-rings based on material and durometer (multinomial classification) and to accurately estimate the mass and durometer with an ultrasonic examination that takes less than 10 seconds. Results from a population including eight materials and six durometers are presented and discussed.

Additive Manufacturing Process Monitoring and Control Technologies

2019

Vibrant demonstrated its PCRT-based approach on AM component populations with variation in build processes, feedstock powder, and post-processing. Sample populations evaluated in this study included a range of AM processes, materials, and component geometries. Vibrant’s demonstrations included the detection of process variation and defective material states. Vibrant also conducted a business case analysis that showed how PCRT will reduce costs, improve yield, and enhance supply chain flexibility.

Process Compensated Resonance Testing for Detection of Counterfeit, Substandard, Nonconforming, and Improperly Processed Materiel

2017

This report presents the motivation, background, methods and results of a Phase I STTR project that demonstrated the feasibility of using Process Compensated Resonance Testing (PCRT) to detect counterfeit, substandard, nonconforming, and improperly processed materiel for the Defense Logistics Agency (DLA).

Patents

U.S. Patent 10481104, 10718723 for Utilizing RI of in-service parts
U.S. Patent 9157788, 10067094 for Part evaluation system/method using both resonances and surface vibration data
U.S. Patent 8903675 for Acoustic system and method for NDT of a part through frequency sweeps
U.S. Patent 9228981 for Resonance Inspection-based surface defect system/method
U.S. Patent 9335300 for SAW mode-based surface defect method
U.S. Patent 9927403 for Resonance inspection sorting module array
U.S. Patent 10295510 for Part evaluation based upon system natural frequency
U.S. Patent 9074927 for Methods for non-destructively evaluating a joined component
U.S. Patent 9228980 for Non-destructive evaluation methods for aerospace components
U.S. Patent 10746704 for PCRT for process control

An innovative thought leader

Read Vibrant’s publications, white papers and ASTM Standards to keep you up-to-date on the latest with PCRT.