scholarly journals Influence the loading conditions and the stress concentrators on the spatial-time inhomogeneity due to the yield delay and the jerky flow: study by using the digital image correlation and the infrared analysis

2017 ◽  
Vol 11 (42) ◽  
pp. 303-314 ◽  
Author(s):  
Tatyana V. Tretyakova ◽  
Valery E. Wildemann
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Image Correlation ◽  
Infrared Analysis ◽  
Loading Conditions ◽  
Stress Concentrators ◽  
Jerky Flow ◽  
Flow Study

scholarly journals Blunt Notch Strength of AA2024 3-3/2-0.4 Fibre Metal Laminate Under Biaxial Tensile Loading

Metals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 413
Author(s):  
Julian Schwinn ◽  
Eric Breitbarth ◽  
Thomas Beumler ◽  
Guillermo Requena
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Biaxial Loading ◽  
Image Correlation ◽  
Loading Conditions ◽  
Critical Feature ◽  
Fibre Metal Laminates ◽  
Blunt Notch ◽  
Fibre Metal ◽  
Notch Strength

Fibre metal laminates are utilized in lightweight structures, such as aircraft fuselages, as fibre metal laminates provide outstanding fatigue and damage tolerance capabilities, together with a reduced weight compared to monolithic metallic structures. One critical feature of fuselage structures is their strength reduction that owes to riveting, i.e., a state-of-the-art joining technique in aircrafts. In the present work, the blunt notch strength of fibre-laminate panels with rivet holes is investigated under service-relevant biaxial loading conditions. To this purpose, cruciform specimens with a five-hole pattern were produced. These specimens were tested under various biaxiality ratios and fibre orientations. All tests were supported by three-dimensional digital image correlation to obtain the deformation field in the gauge area. Moreover, the displacement fields obtained during deformation were used in an elasto-plastic finite element model as boundary conditions to determine the maximum strains in the vicinity of the blunt notch holes and thus extend the application of the experimental results. The asymmetric strain fields obtained by digital image correlation reveal the interaction of the fibres with the blunt notch holes. Finally, it is shown that the biaxial loading conditions do not significantly influence the blunt notch strength.

Stress Analysis Performed by Photoelasticity and Digital Image Correlation

2015 ◽  
Vol 816 ◽  
pp. 474-481
Author(s):  
Miroslav Pástor ◽  
Martin Hagara ◽  
Ján Kostka
Keyword(s):  
Digital Image Correlation ◽  
Stress Analysis ◽  
Static Analysis ◽  
Experimental Technique ◽  
Basic Principle ◽  
Digital Image ◽  
Image Correlation ◽  
Stress Fields ◽  
Stress Concentrators ◽  
Correlation System

This paper deals with the use of classical experimental technique of photoelasticity as well as modern one – digital image correlation by stress analysis. Both mentioned methods were used to compare the corresponding stress fields obtained on a sample with stress concentrators loaded by bending. The paper contains the basic principle of photoelasticity, methodology of static analysis with polariscope and briefly describes the measurement with low-speed digital image correlation system. Taking into account that the used correlation system does not allow to evaluated stress fields, calculation and visualization of stress fields were realized in program Q-STRESS v.1.0 developed at the authors department.

Determination of the Local Strains Near Stress Concentrators by the Digital Image Correlation Technique

2015 ◽  
Vol 50 (4) ◽  
pp. 488-495 ◽  
Author(s):  
Ya. L. Ivanyts’kyi ◽  
Yu. V. Mol’kov ◽  
P. S. Kun’ ◽  
T. M. Lenkovs’kyi ◽  
M. Wójtowicz
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Image Correlation ◽  
Correlation Technique ◽  
Digital Image Correlation Technique ◽  
Local Strains ◽  
Stress Concentrators
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