On Evaluation and Comparison of Blast Loading Methods Used In Numerical Simulations

Erdik, Atıl; Uçar, Vahdet

doi:10.16984/saufenbilder.357629

Cited by 5 publications

(7 citation statements)

References 7 publications

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“…In structure designs where fast solution processes are privileged, it is appropriate to use the LBE method. However, in this method, it is not possible to observe and examine the shock waves reflected from the target and spreading in the fluid (Erdik et al, 2018) Kingery and Bulmash carried out some experiments to investigate the behaviors of structures under blast load [6]. To obtain the blast parameters, they exploded various amounts of TNT explosives with sphere and hemisphere forms at different distances in front of a plate.…”

Section: Load Blast Enhanced (Lbe) Methodsmentioning

confidence: 99%

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Patlama Yükleri Altında Güçlendirilmiş Çift Perde Yapısının Dinamik Analizi

Ocaktan¹,

Demir²

2020

European Journal of Science and Technology

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The set of the construction elements which are designed to divide the boat structure into compartments and enable the maintenance of the balance of the boat by keeping the water entering the hull in a certain region in case of any damage is called watertight bulkhead. The main factor taken into consideration while determining the number of watertight bulkheads and their structural strength properties is to protect the stability of the ship in case of filling with water after a collision and to ensure that the bulkhead has a resistance level that can endure this water pressure. In warships, these bulkheads can be used for other purposes and may be exposed to a number of military loads in addition to operational loads. This study examines the reinforced watertight double bulkhead structure designed to reduce the effects of blast caused by the explosion in the compartment after the weapon hit on warships and fragmentation effects only under blast loads.

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Section: Load Blast Enhanced (Lbe) Methodsmentioning

confidence: 99%

“…Shock Wave Charge R 0 Plate AIR AIR Figure 2. The basic hybrit LBE-ALE application (Erdik et al, 2018) 3. Geometric and Finite Element Model…”

Section: Zmentioning

confidence: 99%

Patlama Yükleri Altında Güçlendirilmiş Çift Perde Yapısının Dinamik Analizi

Ocaktan¹,

Demir²

2020

European Journal of Science and Technology

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“…Criterion Puck. Fiber strength is determined by the following Equations ( 6)- (7). The strength of the matrix (Equations 8-13), where (Equations 12-13), f mA , f mB , f mCform of failure of the matrix.…”

Section: Methodsmentioning

confidence: 99%

Assessment of the Strength of a Composite Package With Internal Defects According to Various Failures Criteria Under the Influence of Unsteady Load

Medvedskiy¹,

Martirosov²,

Khomchenko³

et al. 2020

PTQ

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One of the priority tasks of the modern aviation industry is to increase the economic efficiency of aircrafts. In the context of solving this problem, when creating new aircrafts, polymer composite materials (PCM) are increasingly used. Particular attention is paid to structural elements, damage to which can lead to a decrease in the strength of an airframe as a whole. Therefore, an essential task in the design, maintenance, and operation of the test is to study the effect of interlayer defects on the strength and behavior of PCM structures under the influence of unsteady loads. This work is devoted to a numerical analysis of the behavior of a plate made of a polymer composite material (PCM) under unsteady load considering interlayer defects of an elliptical shape, as well as an assessment of the strength of a composite package according to various fracture criteria. The problem is solved by the finite element method using the LS-DYNA software package. Then, using the method of mathematical modeling, the interlayer separation of an elliptical shape was analyzed, which allowed to evaluate the strength of the plate and fiber according to the criteria of Hashin, Puck, Chang-Chang, and LaRC03 and compare the results. It was found in the study, that the failure indices and safety factors, which were obtained using various criteria (Hashin and Chang-Chang), have the same distribution, since the dependence of the implemented fracture mode (fiber compression in the longitudinal direction) is identical. Analysis.

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“…Different studies such as Erdik and Uçar's study also compared blast loading techniques by referencing Tabatatei and Volz's (2012) test design and findings (Erdik and Uçar, 2018). In terms of incident pressure and reflected peak pressure, the pressure waves created by the explosion of 34 kg of TNT over 1675 mm of a 1830x1830x165 mm steel plate were measured and estimated.…”

Section: Introductionmentioning

confidence: 99%

“…In terms of incident pressure and reflected peak pressure, the pressure waves created by the explosion of 34 kg of TNT over 1675 mm of a 1830x1830x165 mm steel plate were measured and estimated. In Erdik and Uçar's study, the hybrid technique was found to be effective when measured in terms of total solution time and accuracy when compared to CONWEP, ALE, and combined MM-ALE methods (Erdik and Uçar, 2018). Brief information regarding recent studies using numerical approaches to evaluate and calculate blast loads was provided.…”

Section: Introductionmentioning

confidence: 99%

LS Dyna ile Serbest Hava Ortamındaki Patlama Yükünün Sayısal Simülasyonu için SPH, ALE, Birleştirilmiş ALE-LBE ve CONWEP Yöntemlerinin İncelenmesi

SAVRUKOĞLU

Aslantaş

2023

Journal of Materials and Mechatronics: A

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Different simulation methods can be used to model the response of structures to the effects of blast loading. While some simulation methods are based on empirical blast loading principles, other methods use a fluid structure interaction algorithm to predict post-explosion shock waves and their physical effects. In this study, CONWEP, SPH, ALE, and coupled MM-ALE with LBE numerical methods were compared against each other according to results from an experimental study. Each method was compared with the test results in terms of solution time, convergence, and the use for different explosive types and environments. According to this comparison, it was concluded that empirical methods can be used for more limited environmental conditions and blast types, ALE numerical methods can give very sensitive results even in different solution sets but the solution time is long. Meanwhile in SPH method, the interaction of the air and blast shock cannot be fully modelled. According to the results of the study, the hybrid method is consistent with the test results in terms of peak pressure with a deviation of 7.44% at P1 and 2.29% at P2 under spherical free air blast loading conditions. However, since the effects of reflected pressure cannot be modelled exactly in the hybrid method, the ALE method should be preferred in cases with more complex geometries.

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On Evaluation and Comparison of Blast Loading Methods Used In Numerical Simulations

Cited by 5 publications

References 7 publications

Patlama Yükleri Altında Güçlendirilmiş Çift Perde Yapısının Dinamik Analizi

Patlama Yükleri Altında Güçlendirilmiş Çift Perde Yapısının Dinamik Analizi

Assessment of the Strength of a Composite Package With Internal Defects According to Various Failures Criteria Under the Influence of Unsteady Load

LS Dyna ile Serbest Hava Ortamındaki Patlama Yükünün Sayısal Simülasyonu için SPH, ALE, Birleştirilmiş ALE-LBE ve CONWEP Yöntemlerinin İncelenmesi

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