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1

Flexural stability analysis of stiffened plates using the finite element method

Panda S., Barik M.

Computer Assisted Methods in Engineering and Science

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2017

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Vol. 24, no. 3

181--198

EN

A four-noded stiffened plate element has been developed which has all the advantages and efficiency of an isoparametric element to model arbitrary shaped plates, but without the disadvantage of the shear-locking problem inherent in the isoparametric element. Another unique feature is that the arbitrary placement of the stiffener inside the plate element is without any restriction of its orientation. The boundary conditions have been incorporated in a general manner so as to accommodate the curved as well as the straight-edged boundaries. The element has been used for stability analysis of arbitrary shaped stiffened plates.

2

Evaluation of pre-jamming indication parameter during blind backfilling technique

Panda S., Pal S. K., Murthy P. V. S. N.

Journal of Sustainable Mining

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2016

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Vol. 15, iss. 3

100--107

EN

Hydraulic blind backfilling is used to reduce subsidence problems above old underground water-logged coal mines. This paper describes experimental research on a fully transparent model of a straight underground mine gallery. An automatic data acquisition systemwas installed in the model to continuously record the sand and water flowrates along with the inlet pressure of the slurry near the model's inlet. Pressure signature graphs and pressure loss curves with bed advancement under different flow conditions are examined. Pressure signature analyses for various flowrates and sand slurry concentrations are conducted to evaluate a pre-jamming indication parameter, which could be used to indicate the arrival of the final stage of filling.

3

Channel coordination, pricing and replenishment policies in three-echelon dual-channel supply chain

Modak N. M., Panda S., Sana S. S.

Control and Cybernetics

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2015

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Vol. 44, no. 4

481--518

EN

This paper addresses pricing, replenishment policies, coordination, and issues of surplus proﬁt division among the members of the dual-channel supply chain for a particular product whose unit cost decreases continuously over product’s life time. In the dual-channel setting, manufacturer, distributor, and retailer with retail channel and the manufacturer’s direct e-channel are considered. When manufacturer is a Stackelberg leader, the paper reveals that the channels are bound to compete with each other on price severely in the centralized as well as decentralized system. It is observed that more preference on the retail channel may lead to non coexistence of proﬁtable retail-e-tail channel which results in a threshold for higher retail price than the online price. The mechanism of all unit quantity discount with agreement of franchise fee coordinates the channel and provides for the win-win outcome. Finally, Nash bargaining over product depicts particular proﬁt division among the channel members. A numerical example is provided in order to test and justify the proposed model.