Numerical study on failure of laminated glass subjected to low-velocity impact

Hála, Petr; Zemanová, Alena; Zeman, Jan; Šejnoha, Michal

doi:10.1007/s40940-022-00210-z

Cited by 7 publications

(2 citation statements)

References 32 publications

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“…The last experiment is concerned with adjusting the onset of damage. This is because the stress calculated in the contact zone between an impactor and glass exceeds the glass strength f t earlier than the glass breaks in experiments [13,28]. This is quite important also with the phase-field analysis.…”

Section: Damage Of Single Glass Plymentioning

confidence: 96%

Prediction of Pre- and Post-Breakage Behavior of Laminated Glass Using a Phase-Field Damage Model

2023

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Laminated glass composed of several layers of glass plies bonded to a polymer interlayer enjoys ever growing interest in modern architecture. Being often used in impact protection designs requires understanding of both pre- and post-breakage behavior of these structures. This paper contributes to this subject by examining an application of an explicit phase field dynamic model to the description of fracture in a laminated glass subjected to a low velocity impact. The achieved results indicate the ability of the proposed model to successfully describe the onset of damage and subsequent crack propagation. It has, however, been observed that a relatively fine mesh is needed to interpolate a sharp discontinuity accurately, which makes this approach computationally demanding. The model is first validated against experimental results obtained for a single-layer float glass. Next, the usability of the phase-field damage model as a crack predictor in individual layers of the composite is investigated. The dependence of the results on residual stiffness, element type, and initial tensile strength is examined and discussed.

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Section: Damage Of Single Glass Plymentioning

confidence: 96%

Prediction of Pre- and Post-Breakage Behavior of Laminated Glass Using a Phase-Field Damage Model

2023

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“…The last experiment is concerned with adjusting the onset of damage. This is because the stress calculated in the contact zone between an impactor and glass exceeds the glass strength f t earlier than the glass breaks in experiments [61,125]. This is quite important also with the phase-field analysis.…”

Section: Damage Of Single Glass Plymentioning

confidence: 96%

Brittle fracture of laminated glass structural elements

Schmidt

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Many damage models have been developed over the past decades, but most of them still struggle to simulate damage without additional ad-hoc criteria or the need for difficult implementation. In particular, brittle fracture models that represent a mathematical singularity are not easy to be simulate correctly. Recently discovered phase field models prove to be advantageous in many ways. These are variationally consistent models that show a high degree of robustness. Problems such as tensile cracking, cracking of a specialized structure in 3D, crack branching or crack initiation are all described by the same set of equations. Since the model uses a regularized damage field, its implementation is also efficient. Laminated glass is a material that needs to be investigated even after cracks appear. Undamaged laminated glass is a stunning material itself, but its undisputed advantage is its cohesiveness and load-bearing capacity even in post-breakage domain. And phase-field models are suitable for simulating this residual load capacity, which allow investigating both the initiation of cracks and their branching and the impact on the structural response. This work is supposed to bring the combination of such phenomena - the simulation of laminated glass before and after the appearance of cracks. Models of different degrees of spatial reduction and structures under different loading are investigated. The work first investigates the quasi-static response of the beams, then stochastically investigates the response when the strength changes and is concluded by investigating the low-velocity impact. The paper primarly tries to create fully applicable approaches for engineering practice and reveals the benefits and shortcomings of such an approach for glass modeling.

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