Ashutosh Sutra Dhar
Memorial University of Newfoundland
GeologyEngineeringFinite element methodNonlinear systemComposite materialPipeline transportHigh-density polyethyleneMains electricityGeotechnical engineeringInternal pressureMetallurgyMaterials scienceCorrosionCast ironThermoplasticBurst pressureComputer scienceFracture mechanicsStructural engineeringBendingStress (mechanics)
52Publications
9H-index
242Citations
Publications 50
Newest
#1Bipul Chandra Mondal (MUN: Memorial University of Newfoundland)H-Index: 5
#2Ashutosh Sutra Dhar (MUN: Memorial University of Newfoundland)H-Index: 9
3 CitationsSource
AbstractCircumferential cracking or ring fracture has been identified as the most common type of failure mode for cast-iron water mains. However, the cause of circumferential cracking in water main...
2 CitationsSource
#1Abu Hena Muntakim (MUN: Memorial University of Newfoundland)H-Index: 2
#2Ashutosh Sutra Dhar (MUN: Memorial University of Newfoundland)H-Index: 9
Last. Rajib Dey (St. John's University)H-Index: 1
view all 3 authors...
AbstractThe acoustic emission (AE) method is becoming popular for detecting leaks in municipal water mains where leaks are identified and the locations are determined through the interpretation of ...
4 CitationsSource
#1Bipul Chandra Mondal (MUN: Memorial University of Newfoundland)H-Index: 5
#2Ashutosh Sutra Dhar (MUN: Memorial University of Newfoundland)H-Index: 9
Abstract Offshore pipelines operating under high pressure and temperature are subjected to upheaval buckling. Pipeline behaviour in upheaval buckling depends on a number of factors including the shape of pipeline imperfection, installation stresses, loading types, seabed sediment behaviour and the flexural stiffness of the pipe. Current method of predicting upheaval buckling is based on simplified shapes of pipeline imperfection developed for idealized seabed conditions. To account for the effec...
5 CitationsSource
#1Bipul Chandra Mondal (MUN: Memorial University of Newfoundland)H-Index: 5
#2Ashutosh Sutra Dhar (MUN: Memorial University of Newfoundland)H-Index: 9
The strength of pipeline with multiple corrosion patches depends on the number of corrosion patches within an area on the pipe surface, the locations of corrosion patches along the longitudinal and circumferential directions of the pipe. In this paper, the strength and deformation characteristics of corroded pipeline are investigated using finite element analysis. Pipes with different diameters and different depths of corrosion patches are considered. The spacing of the corrosion patches is vari...
8 CitationsSource
#1Bipul Chandra Mondal (MUN: Memorial University of Newfoundland)H-Index: 5
#2Ashutosh Sutra Dhar (MUN: Memorial University of Newfoundland)H-Index: 9
7 CitationsSource
A number of burst pressure models were developed to determine the remaining strength of corroded pipelines. However, no single model has been found to be acceptable for predicting the burst pressure correctly. In this paper, the burst pressure models for corroded pipelines are revisited based on the structures of three existing models. The model parameters are re-evaluated using an optimization (differential evolution) algorithm with a database developed based on finite element (FE) analysis. A ...
11 CitationsSource
1 Citations
ABSTRACT: A nonlinear three-component elastic viscoplastic strain-rate-dependent model was developed for a high-density polyethylene pipe material. In this model, the stress at any point is assumed to be a unique function of the instantaneous irreversible strain, its rate and acceleration, irrespective of any intermediate stress and strain history. However, a reference strain rate was assumed and below this the response was independent of the strain rate. Parameters of the model were determined ...
4 CitationsSource
#1Ashutosh Sutra Dhar (MUN: Memorial University of Newfoundland)H-Index: 9
#2Abu Hena Muntakim (MUN: Memorial University of Newfoundland)H-Index: 2
Nonlinear finite element analysis of axi-symmetrically dented/wrinkled pipe has been presented in this paper. The pipe including surrounding soil was modelled using three different approaches to indicate the effects of modelling approaches on the simulation of pipe behavior. In the first approach, pipe was modelled with the geometry of the dented/wrinkled pipe without consideration of any residual stress and stress history. In the second approach, residual stress was applied at the nodal points ...
1 CitationsSource