Design of water shock tube for testing shell materials

Ji, Hongjuan; Mustafa, Mohamad Y.; Khawaja, Hassan Abbas; Ewan, B. C. R.; Moatamedi, Mojtaba

doi:10.1260/1708-5284.11.1.55

Cited by 5 publications

(7 citation statements)

References 11 publications

(11 reference statements)

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“…Various previous works have mentioned the importance of each of these concepts separately [1][2][3][4][5][6][7][8], but recent researches demonstrate that both concepts should be taken simultaneously into account to improve characteristics and security level of structural systems [9][10][11][12][13]. So, it is very important to determinate how to use the reliability and vulnerability analyses for making decisions on critical infrastructures or structures.…”

Section: Drop Weight Impact Testing (Dwit)mentioning

confidence: 99%

“…Different modeling techniques are used to model the impact dynamics of composite structures [10]- [13]. In general, there are four categories considered: energy-balance models, which assume a quasi-static condition; spring-mass models that simplify the dynamics of the structure; complete models in which the full behavior of the structure is modeled; and finally, a model for impact on infinite/ finite plates.…”

Section: Numerical Analysismentioning

confidence: 99%

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Strain Wave Analysis in Carbon-Fiber-Reinforced Composites subjected to Drop Weight Impact Test using ANSYS®

2021

IJM

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Composite materials are becoming more popular in technological applications due to the significant weight savings and strength these materials offer compared to metallic materials. In many of these practical situations, the structures suffer from drop impact loads. Materials and structures significantly change their behavior when submitted to impact loading conditions as compared to quasi-static loading. The present work is devoted to investigating the elastic strain wave in Carbon-Fiber-Reinforced Polymers (CFRP) when subjected to a drop test. A novel drop weight impact test experimental method evaluates parameters specific to 3D composite materials during the study. A strain gauge rosette is employed to record the kinematic on the composites' surface. Experimental results were validated through numerical analysis by FDM Numerical Simulations in MATLAB® and ANSYS® Explicit Dynamic Module. A MATLAB® code was developed to solve wave equation in a 2-D polar coordinate system by discretizing through a Forward-Time Central-Space (FTCS) Finite Difference Method (FDM). Another FEA analysis was performed in ANSYS® Workbench Explicit Dynamics module to simulate the elastic waves produced during the DWIT.The study demonstrates that the elastic waves generated upon impact with a 33 g steel ball from a height of 1 m in a quasi-isotropic CFRP sheet give a strain wave frequency of 205 Hz and finish in almost 0.015 s due to a significant damping effect. Numerical simulations were in good agreement with the experimental findings.

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Section: Drop Weight Impact Testing (Dwit)mentioning

confidence: 99%

Section: Numerical Analysismentioning

confidence: 99%

Strain Wave Analysis in Carbon-Fiber-Reinforced Composites subjected to Drop Weight Impact Test using ANSYS®

2021

IJM

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“…Another method is based on creating shock waves in a shock tube [8]. Such method has considerable advantages in comparison to earlier methods [9,10]. In this method, either a solid projectile or a high pressure fluid is injected into a tube containing liquid instantaneously.…”

Section: Introductionmentioning

confidence: 99%

“…The intensity of shock wave is controlled using velocity of entering projectile or the pressure of fluid. Further control can be added using a T-junction in the tube [9]. Pressure transducers and strain gauges can be placed along the tube for the collection of data.…”

Section: Introductionmentioning

confidence: 99%

Study of CRFP Shell Structures under Dynamic Loading in Shock Tube Setup

Khawaja

Bertelsen²,

Andreassen

et al. 2014

Journal of Structures

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The paper gives the study of the response of carbon fiber reinforced polymers (CRFP) quasi-isotropic shell structures under the influence of dynamic loading. The quasi-isotropic CRFP shell specimens are fabricated using Multipreg E720 laminates. These laminates are laid in such a way that shell structure has equal strength and mechanical properties in the two-dimensional (2D) plane and hence can be regarded as quasi-isotropic. In this study, the dynamic loading is generated using shock waves in a shock tube experimental setup. The strain and pressure data is collected from the experiments. Additional tests are carried out using Material Test System (MTS) for both tensile and flexural response of CRFP. Results obtained from experiments are compared with numerical simulations using ANSYS Multiphysics 14.0 finite element method (FEM) package. The numerical simulation and experimental results are found to be in good agreement.

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“…Efforts has also been made to analyze the structure analytically highlighting key assumptions and limitations [33][34][35]. It is also well-known that extreme conditions contribute towards structural failures [36][37][38][39].…”

mentioning

confidence: 99%

Multiphysics based Modal and Harmonic Analysis of Axial Turbines

2022

IJM

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Vibration deals with the oscillatory motion of dynamic systems and is a combination of matter possessing mass, elasticity, where parts are capable of relative motion [1,2]. Dynamic systems are well-studied and there are a number of examples in aerospace and automotive industry [3][4][5][6][7]. All bodies possessing mass and elasticity potentially can vibrate at specific natural frequencies if excited appropriately. For example, a study involving drop-weight-impact-test of composite clearly demonstrate this phenomenon [8,9]. The resonance phenomenon occurs if the natural frequency of the structural system matches with the frequency of dynamic loading, which may reveal system characteristics [10,11] and if not planned may lead to structure failure [12][13][14]. Tremendous efforts have been made to study the failure mechanism including use of novel techniques such as thermography [15][16][17].Access to computational power has supported the use of numerical methods for various complex multiphysics studies [18,19]. Finite element (FE) methods are being used at large extent for structural analysis [20]. Commercial Software ANSYS® Inc. is well-known for its use for structural analysis [21,22]. A vast number of case studies has been reported where ANSYS® has been employed for complex structural analysis [23][24][25][26][27][28][29][30][31][32].

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Design of water shock tube for testing shell materials

Cited by 5 publications

References 11 publications

Strain Wave Analysis in Carbon-Fiber-Reinforced Composites subjected to Drop Weight Impact Test using ANSYS®

Strain Wave Analysis in Carbon-Fiber-Reinforced Composites subjected to Drop Weight Impact Test using ANSYS®

Study of CRFP Shell Structures under Dynamic Loading in Shock Tube Setup

Multiphysics based Modal and Harmonic Analysis of Axial Turbines

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