scholarly journals Optical Stereometric Analysis of An Experimental Partially-Edentulous Mandible

2021 ◽  
Author(s):  
Srđan Poštić ◽  
Miloš Milošević ◽  
Taško Maneski ◽  
Goran Mladenović ◽  
Snežana Brković ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Precise Measurement ◽  
Three Dimensional ◽  
Correlation Method ◽  
High Accuracy ◽  
Image Correlation ◽  
Lower Jaw ◽  
Edentulous Mandible ◽  
Abutment Teeth

Abstract Background: Stereooptics method have been successfully used in biomechanical studies of models of dental and jaw bone tissues. The aim of this study was to investigate, by optical stereometry, the distribution of occlusal loads, depending on the functional deformities, on casts of a partially-edentulous lower jaw without copings as well as on the dedicated copings and the remaining solid tissue under the copings.Material and Methods: Precise measurement of strain and displacement of partially-edentulous mandibular control and experimental casts were provided by the digital image correlation method and software ARAMIS which determined the shape of the photographed object with high accuracy, its dimensions, field of three-dimensional (3D) movements, vector of distorted field and features of the biomaterial. Simulated loads were in the range between 0 and 1000 N.Results: Displacements and deformations of abutment teeth within the control cast of a partially-edentulous mandible were 0.48% for incisor without coping, 10.29% for canine without coping and 6.64% for premolar without coping, and within the experimental cast of a partially-edentulous mandible they were 0.29% for incisor with coping, 7.007% for canine with coping and 4.98% for premolar with coping.Conclusions: When loading the abutment teeth, the distribution of strain through the remaining tooth substance is specific and various, and abutment teeth covered by protective copings are more resistant to loads.

Experimental analysis of diamond and regular tubular braided composites using three-dimensional digital image correlation

2017 ◽  
Vol 51 (28) ◽  
pp. 3887-3907 ◽  
Author(s):  
Garrett W Melenka ◽  
Jason P Carey
Keyword(s):  
Digital Image Correlation ◽  
Elastic Properties ◽  
Digital Image ◽  
Three Dimensional ◽  
Correlation Method ◽  
Image Correlation ◽  
Longitudinal Reinforcement ◽  
Braided Composites ◽  
Strain Fields ◽  
Shear Moduli

Braided composites can be manufactured in a variety of braid patterns: Diamond (1/1), Regular (2/2), and Hercules (3/3) and with longitudinal reinforcement (Triaxial). The complex strain fields, which could help reveal phenomenological behavior of braids, have not been experimentally assessed. As such, the objectives of this article were to investigate the effect of braid pattern (Diamond, Regular), braid angle (35°, 45°, 55°), and load (tensile, torsion) on the strain field and elastic properties (longitudinal and shear moduli) using a three-dimensional digital image correlation method. The methodology presented in this manuscript will be used to validate a new analytical model, which predicts the elastic properties of tubular braided of both varying braid type and braid angle.

Digital image correlation method for measuring deformations of vinyl chloride-coated metal multilayer sheets

2019 ◽  
Vol 33 (05) ◽  
pp. 1950050 ◽  
Author(s):  
Dehai Zhang ◽  
Yanqin Li ◽  
Guizhong Xie ◽  
Duanqin Zhang ◽  
Shen Wu ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Vinyl Chloride ◽  
Digital Image ◽  
Deep Drawing ◽  
Steel Plate ◽  
Three Dimensional ◽  
Correlation Method ◽  
Image Correlation ◽  
3D Digital Image Correlation ◽  
Coated Metal

A three-dimensional (3D) digital image correlation (DIC) method is presented for measuring the deformations of vinyl chloride-coated metal (VCM) multilayer sheets and their composites. The calculations and the principle of strain and deformation measurements using the DIC method are described. A VCM multilayer sheet consists of a substrate [steel plate cold commercial (SPCC) and steel plate cold elongation (SPCE)] and a clad (a VCM film). The corresponding deformations of VCM deep-drawing multilayer sheets (SPCE as a substrate and a VCM film as a clad), VCM nondeep-drawing multilayer sheets (SPCC as a substrate and a VCM film as a clad), nondeep-drawing substrates (SPCC), deep-drawing substrates (SPCE) and clads (VCM films) were captured along the x- and y-directions in uniaxial tension experiments and using the DIC method. The maximal measured strains along the x-direction for the VCM deep-drawing multilayer sheets, VCM nondeep-drawing multilayer sheets, nondeep-drawing substrates, deep-drawing substrates and clads were, respectively, 637.835%, 132.210%, 31.688.632%, 107.102%, and 118.937%. The maximal measured strains along the [Formula: see text]-direction were 739.028%, −11.174%, −9.678%, −13.273% and 12.120%, respectively. These data show that the mechanical properties of VCM multilayer sheets are better than those of their substrates and clads. The effectiveness and accuracy of the presented DIC method for VCM multilayer sheet measurements were confirmed in a series of experiments.

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