Thermoelastic Investigation of Carbon-Fiber-Reinforced Composites Using a Drop-Weight Impact Test

Zahra, Andleeb; Malik, Muhammad Sohail; Khawaja, Hassan Abbas; Nordli, Anders; Antonsen, Ståle; Hussain, G.; Moatamedi, Mojtaba

doi:10.3390/app11010207

Cited by 10 publications

(7 citation statements)

References 42 publications

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“…Analytical results were obtained through theoretical analysis of stress profile [35][36][37][38][39] in the longitudinal direction of the sample beam similar studies were performed by Zahra et al [40][41][42][43][44]. Numerical models involved icing have been studied/reviewed by Khawaja et al and others [45][46][47][48][49][50].…”

Section: Analytical and Numerical Simulation Resultsmentioning

confidence: 99%

Multiphysics Analysis of Ice-Polyurethane Adhesion under Flexural Loading using FEM Analysis

Eidesen¹,

Zahra²,

Khawaja³

et al. 2021

IJM

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This paper present the Finite Element Analysis (FEA) Multiphysics technique, applied to study the strength of ice adhesion between the surface of polyurethane and ice. The theoretical study of this work is based on the Euler-Bernoulli beam theory that is used to solve a four-point bending problem to give the correlation of displacements with load and longitudinal stresses. The physical samples were prepared by freezing ice over the polyurethane surface and were tested experimentally in a four-point flexural setup. In the experiment, masses were added on the four-point bench until the ice separates from the surface. The results revealed that the ice adhesion on the surface of polyurethane is in the same range as with other polymers. The displacement at the time of separation was recorded, and the same conditions were used to perform numerical simulations in ANSYS® Workbench. The meshed ice-polyurethane Finite Element Method (FEM) model was tested for sensitivity. A good agreement was found between theoretical, experimental and numerical simulation results.

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Section: Analytical and Numerical Simulation Resultsmentioning

confidence: 99%

Multiphysics Analysis of Ice-Polyurethane Adhesion under Flexural Loading using FEM Analysis

Eidesen¹,

Zahra²,

Khawaja³

et al. 2021

IJM

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“…The Finite Difference Method (FDM) is a numerical method for solving differential equations such as the two-dimensional wave [22][23][24][25][26][27], as given in Equation 1. This method approximates the differentials by discretizing the dependent variables (strain) in the independent variable domains (space and time, in this case) [27][28][29].…”

Section: Finite Difference Methods (Matlab®)mentioning

confidence: 99%

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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“…To bring this approximation to a three-dimensional problem, two other space coordinates 𝑗𝑗 and 𝑘𝑘 is introduced. Thus, the final FTCS FEM can be derived [32][33][34] as given in Equation 8:…”

Section: Forward-time Central-space (Ftcs) Fdmmentioning

confidence: 99%

Determining Thermal Properties of Polyurethane by Solving the Heat Equation and IR Imaging

2022

IJM

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All materials have different and unique thermal properties that determine how the temperature changes when a material is subjected to a temperature difference. This study was intended to investigate the thermal properties of a polymer called Polyurethane, focusing on anti-seepage and anti-abrasion polyurethane. The thermal conductivity and heat transfer coefficient of cold polyurethane specimens have been calculated by capturing the infrared signature using a FLIR T1030Sc Infrared camera and comparing the results with simulated results. The simulations were carried out in MATLAB®, and the solution is based on the Heat equation. This paper describes the driving mechanisms behind the Heat equation and how the approximated solution to the Heat equation is obtained by discretizing through a forward-time central-space (FTCS) finite-difference method. The results reveal that the heat transfer coefficient for anti-abrasion Polyurethane is almost four times that for anti-seepage Polyurethane. The thermal conductivity for the respective has a difference of a factor of two. A good agreement between the experimental and the numerical study was achieved. This study is helpful for the potential use of polyurethane material in Arctic regions either as a coating material for pipes or as a sealant in the oil and gas industry.

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Thermoelastic Investigation of Carbon-Fiber-Reinforced Composites Using a Drop-Weight Impact Test

Cited by 10 publications

References 42 publications

Multiphysics Analysis of Ice-Polyurethane Adhesion under Flexural Loading using FEM Analysis

Multiphysics Analysis of Ice-Polyurethane Adhesion under Flexural Loading using FEM Analysis

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

Determining Thermal Properties of Polyurethane by Solving the Heat Equation and IR Imaging

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