Qualitative visualization of the development of stresses through infrared thermography

Stange, Even; Zahra, Andleeb; Khawaja, Hassan Abbas

doi:10.21443/1560-9278-2019-22-4-503-507

Cited by 12 publications

(13 citation statements)

References 4 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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“…Drop Weight Impact Test Experiment was performed using a spherical steel ball of 20mm diameter, as shown in Figure 3 [20,21]. A rosette strain gauge stacked configuration (at 0º, 45º, and 90º-degree direction) is attached at the bottom of the CFRP plate (backside of the plate), as shown in Figure 4.…”

Section: Experimental Setup To Perform a Drop Testmentioning

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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“…This is the same point that had both the maximum deformation and maximum pressure. Stange et al performed similar work to visualize stresses in steel samples using IR Thermography [35] [36].…”

Section: Equivalent Stressmentioning

confidence: 99%

Multiphysics Analysis of Contact Pressure Profile of Airless tires as compared to Conventional Tires

Ludvigsen

Zahra

Khawaja

et al. 2020

IJM

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Qualitative visualization of the development of stresses through infrared thermography

Cited by 12 publications

References 4 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®

Multiphysics Analysis of Contact Pressure Profile of Airless tires as compared to Conventional Tires

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