The world has been plagued by an unforeseen threat to public health by the appearance of COVID-19, which has impacted the world’s economy and the worldwide supply chain. The unexpected pandemic (COVID-19) quickly spread across the world, leaving not a single country unaffected by the worldwide pandemic. At the start of COVID-19, several countries adopted social distancing and lockdowns due to the virus. The existing pandemic’s discriminatory aspect has a negative influence on human health and the standard of living, as well as worldwide trade, supply chains, and major economies. COVID-19 has been shown to have an effect throughout the broader food supply chain, one of the largest significant sectors of any country, from the field to the consumers. There are currently substantial concerns regarding food production, manufacturing, delivery, and consumption in light of emerging issues within the food supply chain. Limitations on the mobility of workers, variations in consumer demands, the shutdown of food manufacturing industries, limited food trading regulations, and financial stress throughout the food supply chain are all results of the COVID-19 pandemic. The pandemic (COVID-19) has changed consumer behavior and affected the business and economic sector. The purpose of this study was to explore the application of the Q-technique in the investigation of online consumer and manufacturer behavior in relation to end-user food purchases via digital marketing skills, supply chain possibilities, food purchaser and consumer happiness, and e-commerce infrastructure efficiency under the influence of COVID-19. The results show that in the crisis of supply chain management, clarifying the import food industry e-commerce supply chain crisis items, and determining their priority and strength can help enterprises make emergency decisions regarding supply chain operation; they can also be used as a reference for enterprises to use in responding to the crisis.

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The Impact of COVID-19 on the Food Supply Chain and the Role of E-Commerce for Food Purchasing

Analysis of frontal car crash characteristics using ANSYS

In a rail vehicle, fatigue fracture causes a significant number of failures in the coil spring of the suspension system. In this work, the origin of these failures is examined by studying the rail wheel–track interaction, the modal analysis of the coil springs and the stresses induced during operation. The spring is tested experimentally, and a mathematical model is developed to show its force vs. displacement characteristics. A vertical 10-degree-of-freedom (DOF) mathematical model of a full-scale railway vehicle is developed, showing the motions of the car body, bogies and wheelsets, which are then combined with a track. The springs show internal resonances at nearly 50–60 Hz, where significant stresses are induced in them. From the stress result, the weakest position in the innerspring is identified and a few guidelines are proposed for the reduction of vibration and stress in rail vehicles.

Effect of Rail Vehicle–Track Coupled Dynamics on Fatigue Failure of Coil Spring in a Suspension System

This work investigates the crashworthiness of jute fiber mat reinforced epoxy composite circular tubes by introducing holes around the tube circumference. The composite tubes were tested under quas...

Crashworthiness characterization of jute fiber woven mat reinforced epoxy composite tube for structural application using Taguchi’s method

In this paper, a multi-disciplinary analysis method is proposed for evaluating the fatigue life of railway vehicle car body structure under random dynamic loads. Firstly, the hybrid fatigue analysi...

In situ and experimental analysis of longitudinal load on carbody fatigue life using nonlinear damage accumulation

In this paper, the semi-active suspension in railway vehicles based on the controlled Magnetorheological (MR) fluid dampers is examined, and compared with the semi-active low and semi-active high s...

Development of multibody dynamical using MR damper based semi-active bio-inspired chaotic fruit fly and fuzzy logic hybrid suspension control for rail vehicle system:

Development in the modeling of rail vehicle system for the analysis of lateral stability

Realistic modelling of wheel-rail contact is necessary for true analysis of railway vehicle system. This study reviews the rail-wheel contact models with their related computer software programs in detail. The phenomenon of creepage and creep-force is studied in detail in this paper. An insight is presented to linear and non-linear model developed by Carter, Kalker, Johnson &Vermeulen, Halling, Haines and Ollerton and related programs based on their theories. Advanced wheel-rail contact theory is also reviewed in this paper.

Development and advancement in the wheel-rail rolling contact mechanics

Railway vehicle is a complex system comprises of several components and has several degrees of freedom. The railway vehicle moves over the system called railway track which is consisted of different components i.e. rail, rail pad, sleeper, fastening elements, ballast, soil and subsoil etc. Modelling of the track is initiated in year 1860. Since then researchers have formulated different models of track components and track systems to analyse the vehicle behaviour, dynamic interaction at the wheel-rail interface and between the track components itself. This paper reviews the investigations carried out in last 50 years and provides a thorough understanding on dynamic behaviour of different track components.

Sono Bhardawaj

Papers

Development of multibody dynamical using MR damper based semi-active bio-inspired chaotic fruit fly and fuzzy logic hybrid suspension control for rail vehicle system:

Analysis of frontal car crash characteristics using ANSYS

Development in the modeling of rail vehicle system for the analysis of lateral stability

Development and advancement in the wheel-rail rolling contact mechanics

A Survey of Railway Track Modelling