Characterization of High-Strain Rate Mechanical Behavior of AZ31 Magnesium Alloy Using 3D Digital Image Correlation

2011 ◽  
Vol 13 (10) ◽  
pp. 943-948 ◽  
Author(s):  
Yanli Wang ◽  
Hanbing Xu ◽  
Donald L. Erdman ◽  
Michael J. Starbuck ◽  
Srdjan Simunovic
Keyword(s):  
Magnesium Alloy ◽  
Digital Image Correlation ◽  
High Strain Rate ◽  
Strain Rate ◽  
Mechanical Behavior ◽  
Digital Image ◽  
High Strain ◽  
Image Correlation ◽  
3D Digital Image Correlation

scholarly journals The Use of 2D and 3D High-Speed Digital Image Correlation in Full Field Strain Measurements of Composite Materials Subjected to High Strain Rates

Proceedings ◽  
2018 ◽  
Vol 2 (8) ◽  
pp. 538 ◽  
Author(s):  
Ahmed Elmahdy ◽  
Patricia Verleysen
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
High Speed ◽  
High Strain ◽  
Image Correlation ◽  
Full Field ◽  
3D Digital Image Correlation ◽  
Gauge Section ◽  
2D And 3D ◽  
Dic Technique

The aim of this paper is to assess and compare the performance of both high speed 2D and 3D digital image correlation (DIC) configurations in the characterization of unidirectional carbon fiber reinforced epoxy composites in high strain rate tension in the transverse direction. The criteria for assessment were in terms of strain resolution and measuring the strain localization within the gauge section. Results showed the high-speed 3D DIC technique has lower strain resolution compared to the high-speed 2D DIC technique. In addition, the analysis of the full strain fields indicated that the 3D DIC technique could accurately locate and measure the concentrations of strains within the gauge section of the tested samples.

Evaluating the Bending Response of Two Osseointegrated Transfemoral Implant Systems Using 3D Digital Image Correlation

2011 ◽  
Vol 133 (5) ◽  
Author(s):  
Melanie L. Thompson ◽  
David Backman ◽  
Rickard Branemark ◽  
Chris K. Mechefske
Keyword(s):  
Digital Image Correlation ◽  
Mechanical Behavior ◽  
Digital Image ◽  
Tensile Strain ◽  
Mechanical Performance ◽  
Image Correlation ◽  
Great Promise ◽  
Tightening Torque ◽  
3D Digital Image Correlation ◽  
Bending Response

Osseointegrated transfemoral implants have been introduced as a prosthetic solution for above knee amputees. They have shown great promise, providing an alternative for individuals who could not be accommodated by conventional, socket-based prostheses; however, the occurrence of device failures is of concern. In an effort to improve the strength and longevity of the device, a new design has been proposed. This study investigates the mechanical behavior of the new taper-based assembly in comparison to the current hex-based connection for osseointegrated transfemoral implant systems. This was done to better understand the behavior of components under loading, in order to optimize the assembly specifications and improve the useful life of the system. Digital image correlation was used to measure surface strains on two assemblies during static loading in bending. This provided a means to measure deformation over the entire sample and identify critical locations as the assembly was subjected to a series of loading conditions. It provided a means to determine the effects of tightening specifications and connection geometry on the material response and mechanical behavior of the assemblies. Both osseoinegrated assemblies exhibited improved strength and mechanical performance when tightened to a level beyond the current specified tightening torque of 12 N m. This was shown by decreased strain concentration values and improved distribution of tensile strain. Increased tightening torque provides an improved connection between components regardless of design, leading to increased torque retention, decreased peak tensile strain values, and a more gradual, primarily compressive distribution of strains throughout the assembly.

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