scholarly journals Characterization of Additively Manufactured Samples with Mechanical Testing and Nondestructive Inspection Techniques ? A Path Forward for Qualification.

2020 ◽  
Author(s):  
David Moore ◽  
Ciji Nelson
Keyword(s):  
Mechanical Testing ◽  
Nondestructive Inspection ◽  
Inspection Techniques

Characterization of ethylcellulose free films by positron annihilation spectroscopy and mechanical testing

2014 ◽  
Vol 115 ◽  
pp. 47-50 ◽  
Author(s):  
Diána Hegyesi ◽  
Károly Süvegh ◽  
András Kelemen ◽  
Klára Pintye-Hódi ◽  
Géza Regdon
Keyword(s):  
Positron Annihilation ◽  
Mechanical Testing ◽  
Positron Annihilation Spectroscopy ◽  
Free Films

Nondestructive Inspection Methods for Railroad Castings

2010 ◽  
Author(s):  
Daniel Carter ◽  
Kari Gonzales
Keyword(s):  
Magnetic Particle ◽  
Phased Array ◽  
Field Tests ◽  
Ultrasonic Pulse ◽  
Nondestructive Inspection ◽  
Inspection Method ◽  
Technology Center ◽  
Pulse Echo ◽  
Inspection Techniques

Transportation Technology Center, Inc. (TTCI) has investigated various nondestructive inspection (NDI) methods to determine if they are capable of reliably inspecting side frames, bolsters, knuckles, and couplers. The NDI methods used for this investigation include dry and wet (fluorescent) magnetic particle, liquid penetrant, alcohol wipe, visual, ultrasonic (pulse-echo and phased array), and radiography. Inspection results from all methods were used to determine which methods produced repeatable results. From the initial inspection analysis, TTCI engineers determined that the magnetic particle inspection method is the most capable for detecting defects in railroad castings. Further investigation of the magnetic particle technique was completed to develop reliable inspection methods for use on bolsters, side frames, knuckles, and couplers. Each of the inspection techniques have been used for inspections in the field. Using the results of the field tests, procedures were developed by TTCI and submitted to the Association of American Railroads’ (AAR) Coupling Systems and Truck Castings Committee for review and implementation. The inspection procedures can be used by manufacturers, railroads, and car repair shops. Limitations of the inspection procedures include the amount of time necessary to perform the inspection and the reliability of detecting certain types of defects below the surface of the casting. Although these limitations exist, the procedures developed by TTCI are expected to improve the quality of in-service castings and reduce the number of train partings and derailments due to broken or cracked components.

scholarly journals Characterization of a novel caudal vertebral interbody fusion in a rat tail model: An implication for future material and mechanical testing

2017 ◽  
Vol 40 (1) ◽  
pp. 62-68 ◽  
Author(s):  
Yu-Cheng Yeh ◽  
Cheng-Chun Yang ◽  
Ching-Lung Tai ◽  
Tsung-Ting Tsai ◽  
Po-Liang Lai ◽  
...  
Keyword(s):  
Mechanical Testing ◽  
Interbody Fusion ◽  
Rat Tail Model ◽  
Rat Tail

scholarly journals Evaluating sources of technical variability in the mechano-node-pore sensing pipeline and their effect on the reproducibility of single-cell mechanical phenotyping

PLoS ONE ◽  
2021 ◽  
Vol 16 (10) ◽  
pp. e0258982
Author(s):  
Brian Li ◽  
Kristen L. Cotner ◽  
Nathaniel K. Liu ◽  
Stefan Hinz ◽  
Mark A. LaBarge ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Single Cell ◽  
Mechanical Testing ◽  
Cell Types ◽  
Biologically Relevant ◽  
Analytical Instruments ◽  
Technical Variability ◽  
Novice Users ◽  
High Repeatability

Cellular mechanical properties can reveal physiologically relevant characteristics in many cell types, and several groups have developed microfluidics-based platforms to perform high-throughput single-cell mechanical testing. However, prior work has performed only limited characterization of these platforms’ technical variability and reproducibility. Here, we evaluate the repeatability performance of mechano-node-pore sensing, a single-cell mechanical phenotyping platform developed by our research group. We measured the degree to which device-to-device variability and semi-manual data processing affected this platform’s measurements of single-cell mechanical properties. We demonstrated high repeatability across the entire technology pipeline even for novice users. We then compared results from identical mechano-node-pore sensing experiments performed by researchers in two different laboratories with different analytical instruments, demonstrating that the mechanical testing results from these two locations are in agreement. Our findings quantify the expectation of technical variability in mechano-node-pore sensing even in minimally experienced hands. Most importantly, we find that the repeatability performance we measured is fully sufficient for interpreting biologically relevant single-cell mechanical measurements with high confidence.

Gradient-based Hough transform for the detection and characterization of defects during nondestructive inspection

1997 ◽  
Author(s):  
Lew F. L. Y. Voon ◽  
Patrice Bolland ◽  
Olivier Laligant ◽  
Patrick Gorria ◽  
B. Gremillet ◽  
...  
Keyword(s):  
Hough Transform ◽  
Nondestructive Inspection ◽  
Gradient Based
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