Prediction of impact response in construction safety helmet using FEA

Khan, Mohammed Rajik; Sonawane, A. E.

doi:10.1108/jedt-05-2019-0120

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…Nowadays, several prediction approaches are also used to predict and validate the experimental outcomes. [39,40,41,42] Jebran et al [43] have optimized the wear and friction behaviors of glass, bronze, and graphite-filled PTFE composite. The experiment was conducted by varying the sliding conditions and working environment, and so forth.…”

Section: Introductionmentioning

confidence: 99%

Experimentation and optimization of wear behavior on polytetrafluoroethylene composites using response surface methodology and bald eagle search optimization

Gajjal¹,

Lathkar²

2022

Polymer Composites

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In Industries, polytetrafluoroethylene (PTFE) is used as a solid lubricant due to its excellent toughness, lack of reactivity, high-thermal stability, and so forth. However, the abrasive resistive behavior is minimal for the virgin PTFE polymer. In this study, the wear and coefficient of friction (COF) of PTFE composite prepared by the combination of 10% halloysite, 10% graphite, and 10% bronze are investigated. The investigations are performed on a pin-on-disc test rig and analysis is done by response surface methodology (RSM), especially in Box-Behnken Design (BBD). The experimentation is performed by varying the sliding distance (Ds), sliding velocity (Vs), and applied load (L). In the analysis of COF, the load is considered as a significant parameter, and sliding distance is an influencing parameter for wear rate. From the experimentation, the proposed PTFE composite promotes COF of 0.0052 and a wear rate of 0.62 Â 10 À5 mm 3 /Nm. Such observed wear rate and COF are 2.8 times and 1.5 times better than the pure PTFE. The experimented outcomes are validated using hybrid DBN-based bald eagle search optimization (DBN-BESO), and RSM. From the validated results, the proposed hybrid DBN-BESO prediction process using the Matlab platform promotes closer values to the experimented outcomes. Besides, the parametric optimization is conducted using RSM and BESO approaches with the objective of minimum wear rate and COF. The optimized BESO results are superior to the RSM. BESO-based optimized wear rate is 0.0317 Â 10 À5 mm 3 /Nm and COF is 0.0352.

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Section: Introductionmentioning

confidence: 99%

Experimentation and optimization of wear behavior on polytetrafluoroethylene composites using response surface methodology and bald eagle search optimization

Gajjal¹,

Lathkar²

2022

Polymer Composites

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“…Shafabakhsh et al (2018) carried out an analysis of runway pavement response subjected to aircraft moving load by FE method. Impact loading simulation on a construction safety helmet over a head form is carried out by Khan and Sonawane (2019) using 3D FE simulations. Bhaurkar and Thakur (2019) carried out a FE analysis for the investigation of crack in the beams.…”

Section: Introductionmentioning

confidence: 99%

Low velocity impact study of a sandwich beams using Ritz method and finite element modelling

Ali

Jasim

Al-Kasob

2022

JEDT

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Purpose The purpose of this paper is to present an applied method to design the low-speed contact between a mass and surface of a beam using an analytical solution based on the first-order shear deformation beam theory. Also, a simulation of impact process is carried out by ABAQUS finite element (FE) code. Design/methodology/approach In theoretical formulation, first strains and stresses are obtained, then kinetic and potential energies are written, and using a combination of Ritz and Lagrange methods, a set of system of motion equations in the form of mass, stiffness and force matrices is obtained. Finally, the motion equations are solved using Runge–Kutta fourth order method. Findings The von Mises stress contours at the impact point and contact force from the ABAQUS simulation are illustrated and it is revealed that the theoretical solution is in good agreement with the FE code. The effect of changes in projectile speed, projectile diameter and projectile mass on the results is carefully examined with particular attention to evaluate histories of the impact force and beam recess. One of the important results is that changes in projectile speed have a greater effect on the results than changes in projectile diameter, and also changes in projectile mass have the least effect. Originality/value This paper presents a combination of methods of energy, Ritz and Lagrange and also FE code to simulate the problem of sandwich beams under low velocity impact.

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Identification and Reconstruction of Impact Load for Lightweight Design of Production Equipment

Choi

Hwang

et al. 2022

Applied Sciences

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This paper proposes a method for determining externally applied impact loads on complex structures using strain analysis. An impact load transducer was developed to determine impact loads. Using this transducer (which incorporates strain gauges), the relationship between the measured strains and applied impact load was studied, and a model for conversion from strain analysis to impact load was developed. The reconstructed impact curve that characterizes the impact peak force, impact duration, and load in the steady state after impact was employed as an input load curve in finite element analysis. The reconstructed impact load was validated by comparing the structural strain measured on the specimen in the experiments and the strain calculated by the simulations. The results show that the maximum difference between experimentally and numerically determined structural peak strains is 3.2 me. Moreover, the method was validated by predicting the impact load of a descending vehicle chassis on the production equipment in an automotive production line. It demonstrated high efficiency and accuracy. The reconstructed load curve obtained using the developed method provides high efficiency in addition to high accuracy. Furthermore, it circumvents the complexities of modeling dynamic impact simulation, including complex impactor shape, interface, and friction conditions. Thus, the developed method provides scholars with an efficient approach for an extensive study of the responses of complex structures in various fields such as stress strain analysis, fatigue analysis, and topology optimization for lightweight design of production equipment.

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Prediction of impact response in construction safety helmet using FEA

Cited by 3 publications

References 9 publications

Experimentation and optimization of wear behavior on polytetrafluoroethylene composites using response surface methodology and bald eagle search optimization

Experimentation and optimization of wear behavior on polytetrafluoroethylene composites using response surface methodology and bald eagle search optimization

Low velocity impact study of a sandwich beams using Ritz method and finite element modelling

Identification and Reconstruction of Impact Load for Lightweight Design of Production Equipment

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