A Comparative Study of Dynamic Fracture of Soda-Lime Glass Using Photoelasticity, Digital Image Correlation and Digital Gradient Sensing Techniques

Dondeti, S.; Tippur, Hareesh V.

doi:10.1007/s11340-019-00549-5

Cited by 26 publications

(13 citation statements)

References 38 publications

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“…These trends are also observed in experiments [62,69]. Experimental fracture patterns and comparison to numerical prediction for V-notch case.…”

Section: Quantitysupporting

confidence: 69%

“…In Section 6.1, we adopt the benchmark problem from [61] and simulate a pre-cracked glass plate under sudden tensile loading. In Section 6.2, we reproduce a recent experiment considering V-notched glass samples impacted by a striker [62]. In Section 6.3, we simulate the material fragmentation of a cylinder under internal pressure and identify the number of fragments.…”

Section: Fracture Dynamics For Brittle Fracture Experimentsmentioning

confidence: 99%

“…Experimental fracture patterns and comparison to numerical prediction for V-notch case. From left to right: experimental results from photoelasticity in [62]; experimental results from Digital Image Correlation (DIC) in [62]; experimental results from Digital Gradient Sensing (DGS) in [62]; numerical simulation results from the proposed approach.…”

Section: Quantitymentioning

confidence: 99%

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An asymptotically compatible treatment of traction loading in linearly elastic peridynamic fracture

Yu,

You,

Trask

2021

Preprint

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Meshfree discretizations of state-based peridynamic models are attractive due to their ability to naturally describe fracture of general materials. However, two factors conspire to prevent meshfree discretizations of state-based peridynamics from converging to corresponding local solutions as resolution is increased: quadrature error prevents an accurate prediction of bulk mechanics, and the lack of an explicit boundary representation presents challenges when applying traction loads. In this paper, we develop a reformulation of the linear peridynamic solid (LPS) model to address these shortcomings, using improved meshfree quadrature, a reformulation of the nonlocal dilitation, and a consistent handling of the nonlocal traction condition to construct a model with rigorous accuracy guarantees. In particular, these improvements are designed to enforce discrete consistency in the presence of evolving fractures, whose a priori unknown location render consistent treatment difficult. In the absence of fracture, when a corresponding classical continuum mechanics model exists, our improvements provide asymptotically compatible convergence to corresponding local solutions, eliminating surface effects and issues with traction loading which have historically plagued peridynamic discretizations. When fracture occurs, our formulation automatically provides a sharp representation of the fracture surface by breaking bonds, avoiding the loss of mass. We provide rigorous error analysis and demonstrate convergence for a number of benchmarks, including manufactured solutions, free-surface, nonhomogeneous traction loading, and composite material problems. Finally, we validate simulations of brittle fracture against a recent experiment of dynamic crack branching in soda-lime glass, providing evidence that the scheme yields accurate predictions for practical engineering problems.

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“…These trends are also observed in experiments [62,69]. Experimental fracture patterns and comparison to numerical prediction for V-notch case.…”

Section: Quantitysupporting

confidence: 69%

Section: Fracture Dynamics For Brittle Fracture Experimentsmentioning

confidence: 99%

Section: Quantitymentioning

confidence: 99%

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An asymptotically compatible treatment of traction loading in linearly elastic peridynamic fracture

Yu,

You,

Trask

2021

Preprint

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“…The pressure profile applied on the V-notch surfaces shown in Figure 26 is regulated based on the contact force history given by Dondeti and Tippur, 84 and the maximum resultant force on each flank is taken as 2.6 kN. In addition, a coefficient…”

Section: The Sundaram-tippur Impact Panelmentioning

confidence: 99%

Dynamic cracking simulation by the nonlocal macro‐meso‐scale damage model for isotropic materials

Chen

2021

Numerical Meth Engineering

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The newly proposed nonlocal macro-meso-scale damage (NMMD) model is extended to dynamic cracking simulation. For this purpose, the framework of continuum damage mechanics and damage constitutive model are firstly described. The NMMD, where the meso-scale damage is determined according to the deformation of material bond and then the macroscopic topologic damage is endowed with the weighted averaging over the meso-scale damage in the influence domain of the material point, is then elaborated and incorporated into the framework. Specifically, the criterion of meso-scale damage is renormalized. The numerical algorithms including the spatial discretization by the finite element methods and the time integration methods by an explicit scheme are outlined. Several examples are studied in detail, showing the effectiveness of the proposed method. In particular, due to the nonlocal property, there is no spatial mesh size sensitivity. Owing to the scale renormalization of the meso-scale damage, the results are insensitive to the influence radius in some examples. The dynamic cracking, including the crack propagation velocity, the damage dissipation rate, and the connection to the dynamic crack branching, is discussed in detail based on the computed results.

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“…For example, Miao et al replaced the ordinary white light source with a high-power white LED cold light source to illuminate the speckled target, when studying the surface morphology of silicon wafer and the stress gradient of crack tip [ 15 ]. Periasmy et al used two high-energy strobe lights to collect high-quality speckle images and quantitatively analyzed the stress gradient near the crack and at the impact edge in the experiments of cracks and punching in PMMA plates [ 7 ]; Dondeti et al utilized a wide-spectrum Xenon flash lamp to illuminate the speck target in the study of the dynamic fracture process of sodium calcium glass [ 16 , 17 ]. Though the employment of ultra-high-power light source can improve the dynamic capability of DGS, it requires extremely precise synchronization between the light sources and the high-speed camera, which greatly increases the difficulty of DGS implementation.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Digital Gradient Sensing Using Backlight Digital Speckle Target

Dong

et al. 2020

Sensors

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Digital gradient sensing (DGS) is a non-contact and full-field optical measurement technique, which assesses mechanical behaviors of transparent materials or specular structures by measuring angular deflections of light rays. However, owing to the poor light-gathering capability of its imaging system, the dynamic performance of DGS is heavily restricted. Here, a method of enhancing the dynamic performance of DGS by improving its speckle target is proposed. The method employs the technique of backlight illumination, which significantly increases the utilization efficiency of light, shortens the exposure time, and enhances the dynamic performance of DGS. Additionally, it also uses the optimized digital speckle pattern to improve the measurement precision and accuracy. For validation, a comparison experiment was conducted, proving that the proposed method can improve the utilization efficiency of light by about 80 times and improve the quality of the speckle images by about 40%. Real tests, including a uniaxial tension test using transmission-mode DGS (t-DGS) and a three-point bending test using reflection-mode DGS (r-DGS), were also carried out, showing the efficacy and high compatibility of the proposed backlight digital speckle target. In summary, this simple method greatly improves the performance of DGS, which can be used as a standard method in both t-DGS and r-DGS.

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A Comparative Study of Dynamic Fracture of Soda-Lime Glass Using Photoelasticity, Digital Image Correlation and Digital Gradient Sensing Techniques

Cited by 26 publications

References 38 publications

An asymptotically compatible treatment of traction loading in linearly elastic peridynamic fracture

An asymptotically compatible treatment of traction loading in linearly elastic peridynamic fracture

Dynamic cracking simulation by the nonlocal macro‐meso‐scale damage model for isotropic materials

Enhanced Digital Gradient Sensing Using Backlight Digital Speckle Target

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