Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 119 for “"Digital image correlation (DIC)"”.
-
Analysis of the Interface Properties of Multi-material 3D Printed Structures
… the strength of the structures and predicting failure. Digital image correlation (DIC) is a full-field strain measurement technique ideal for evaluating the non-uniform load response in anisotropic materials due to their heterogeneous composition. This thesis demonstrates the …
-
Quantitative Fracture Strength of Lithiated Tin Oxide Nanowires by In-Situ SEM Tensile Experiments
… tip while strain values were obtained using digital image correlation (DIC) from in situ SEM test images. The SnO2 nanowires were synthesized using the vapor-liquid-solid (VLS) growth mechanism on stainless steel substrates using a gold (Au) catalyst. Ex-situ lithiation of the SnO2 nanowires …
-
Damage Control Measures in Composites: Focus on Damage Tolerance of Aerospace Structures
… focusing on the novel application of Digital Image Correlation (DIC) to map surface area changes during in-situ Compression After Impact (CAI) tests. This technique allows for an in-depth analysis of planar strains along the x and y axes, shedding light on the material's behavior under …
-
Multiscale Experimental Study on the Effect of Texture and Anisotropy on the Thermomechanical Response of Zirconium
… of dissipation on deformation mechanism. No correlation is found between deformation twinning and energy dissipation, and the appearance of energy storage in basal textured polycrystals is explained by the presence of localized deformation. Experimental and numerical techniques are used to …
-
On the fracture and fatigue crack growth of thin sheets of nanocrystalline metal alloys
… cobalt (Ni-Co) and rolled Inconel 718. Digital image correlation (DIC) was used to determine the crack opening displacement profiles, and the entire crack displacement fields. These parameters were then used to determine the magnitude of the crack tip stress intensity factor, and virtual …
-
In-Situ Measurement of Resin Shrinkage for Aerospace Components
… resin shrinkage during curing with the help of digital image correlation (DIC) instrumented on a specially designed autoclave with borosilicate viewports. The images of the resin sample are captured at regular intervals with the help of DIC to measure the displacement and strains during the …
-
Kinematics of Inter-Ply Interfaces In Composite Manufacturing
… formation of defects are observed in-situ using digital image correlation (DIC) during the autoclave cure cycle for the first time. The processing-induced defects in the composite are further characterized by X-ray micro-computed tomography (micro-CT). A non-destructive method is developed to …
-
Improvements in digital image correlation and application in material mechanical test
<p>"Digital image correlation (DIC) is a non-contact full-field optical measurement method. With the advantages of high accuracy, low cost, and simple implementation, it has been widely applied in the area of experimental mechanics. In this study, DIC algorithm has been improved in the aspects of …
-
Functionally Graded Fiber-Reinforced Cementitious Composites---Manufacturing and Extraction of Cohesive Fracture Properties Using Finite Elements and Digital Image Correlation
… I cohesive zone model (CZM). First, a full-field digital image correlation (DIC) technique has been adopted to compute the two-dimensional displacement fields. Such displacement fields are used as the input to the finite element (FE) formulation of an inverse problem for computing the CZM. The CZM …
-
Methods for Evaluation of the Remaining Strength in Steel Bridge Beams with Section Losses due to Corrosion Damage
… strain behavior. The strain was measured using a digital image correlation (DIC) system to create a digital strain field at equal loading and beam displacement intervals during testing. The data recorded during these large-scale tests was compared to several existing methods for calculating the …
-
In-situ Characterization and Machine Learning Applications for Composite Processing
… devised an in-situ methodology that leverages Digital Image Correlation (DIC) and Machine Learning Applications to effectively observe and track defect deformations occurring throughout the process. This process presents a dataset derived from the curing process of 40 carbon fiber-reinforced …
-
In-Situ Monitoring of Additive Manufacturing Using Digital Image Correlation
… In this research, an in-situ approach using Digital Image Correlation (DIC) is developed to monitor the deformation during the processing, and thereby analyze the formation of defects and residual stresses. DIC is a visual technique that compares the changes in speckle pattern in consecutive …
-
High resolution fatigue crack growth analysis of crack closure and slip irreversibility using digital image correlation
… of 316L stainless steel were investigated using digital image correlation (DIC). A polycrystalline and a oriented specimen were tested to study mode I fatigue crack growth, while oriented specimens were used to study mixed mode (I and II) fatigue crack growth. DIC was used to determine the crack …
-
Fatigue Strengthening of Damaged Steel Plates using Ultra-High Modulus Carbon Fibre-reinforced Polymer Plates
… tip. Distributed fiber optic sensors (DFOS) and digital image correlation (DIC) are used to capture the full strain field and track crack growth. Results showed that fatigue life was increased by up to 2.0 and 2.34 times for single- and double-sided UHM CFRP repairs. As bond length increased from …
-
Experimental Study of the Displacements Caused by Cone Penetration in Sand
… of a half-circular calibration chamber with digital image correlation (DIC) capability, was developed for experimental simulation of cone penetration. The flat side of the chamber is transparent, made of Plexiglass. In individual tests, sand samples are prepared inside the half-circular …
-
Laxity of the Hip Capsule in Natural and Posteriorly Implanted Specimens
… and virtual extensometers were calculated by Digital Image Correlation (DIC) software for Finite Element Analysis (FEA) model validation. The range of motion (ROM) was evaluated at up to 3 Nm of torque applied in both internal/external rotation and abduction/adduction and varied throughout the …
-
Quantifying Renal Swelling during Machine Perfusion using Digital Image Correlation
… An experimental methodology was developed to image porcine kidneys undergoing hypothermic machine perfusion (5 deg C) for 15 minutes followed by 120 minutes without perfusion to quantify surface displacement (renal swelling) with digital image correlation (DIC). Surface displacement and size …
-
Mechanical Effects of Surgical Adhesives on Ascending Thoracic Aortic Aneurysm Replacement
… and Tisseel, on the suture site using in-vitro digital image correlation (DIC) method and finite element (FE) simulations in an ovine model. In this study, first, mechanical properties of ovine ascending aorta were obtained by optimizing the FE simulation results with DIC data. Subsequently, …
-
Experimental analysis of the efficiency of carbon fiber anchors applied over CFRP to firebrick bonded joints
… surface have been realized by means of Digital Image Correlation (DIC), an optical appealing method never used to study a FRP to support bonded joint fastened by FRP anchor. The experimental analyses shown that the CFRP anchors applied onto a CFRP to support bonded joint permit to …
-
Digital image correlation analysis of alkali silica reaction in concrete with recycled glass aggregate
Digital image correlation (DIC) is an effective tool for measuring the in-plane displacement and full-field strain of the surface of an object. DIC can be implemented as a low-cost non-destructive technique using a time series of images of the object of interest. The advantages of DIC inspires the …
Page 1 of 6