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
#1Ashutosh Sutra Dhar (BUET: Bangladesh University of Engineering and Technology)H-Index: 9
#2Ian D. Moore (Queen's University)H-Index: 26
Full-scale pipe tests were conducted to investigate local bending on profiles of different thermoplastic pipes. Five profiled pipes including two lined corrugated, one box and one tubular profile of HDPE material and one ribbed profile of PVC material were considered. The study demonstrates that a three-dimensional bending mechanism governs the strains on some components of the pipe profiles. The local bending was particularly significant in the lined corrugated and the tubular profiled pipes. T...
4 CitationsSource
#1Ashutosh Sutra Dhar (UWO: University of Western Ontario)H-Index: 9
#2Ian D. Moore (Queen's University)H-Index: 26
Last. Timothy J. McGrath (Simpson Gumpertz & Heger Inc.)H-Index: 8
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Tests have been performed in a biaxial pipe test cell to develop baseline information on profiled pipe behavior under biaxial loading. These include a lined corrugated high-density polyethylene pipe and a helically wound ribbed polyvinyl chloride pipe. Results of the tests are utilized to examine the effectiveness of the two-dimensional methods of buried pipe analysis. Calculations of pipe responses by the two-dimensional finite element method and a set of simplified design equations are compare...
37 CitationsSource
#1Ashutosh Sutra Dhar (BUET: Bangladesh University of Engineering and Technology)H-Index: 9
#2Md. Saiful Alam Siddiquee (BUET: Bangladesh University of Engineering and Technology)H-Index: 1
Last. Ahmad Niaz Sinha (Dhaka University of Engineering & Technology, Gazipur)H-Index: 1
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Seven different rib profiled polyvinyl chloride (PVC) pipes were investigated in a test facility developed at the Bangladesh University of Engineering and Technology. The pipes were backfilled with native Dhaka clay. Use of native soil as backfill material saves the additional costs associated with importing materials and conserves resources such as granular soil. The test facility was designed to study the performance of buried pipes under a quasi-live load. The study revealed that the PVC pipe...
1 CitationsSource
#1Munaz Ahmed NoorH-Index: 7
Research reported in this paper performed a three-dimensional finite element analysis to study the pipe/soil interaction under a vehicle load. Stresses on the pipe as well as on the surrounding soil were calculated to understand the pattern of the ground stresses developed due to the live load. For their evaluation purposes, the stresses are compared with recent design codes.
4 CitationsSource
#2Munaz Ahmed NoorH-Index: 7
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The scope of this study included: data collection pertaining to the subgrade condition, material and geometric properties of gas pipelines; analysis of the buried pipe-soil system under various embedment and loading conditions; identification of the most likely factor of safety, taking into account the existing geometry, available data, and boundary safety factors; and development of a viable and safe construction method.
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#2Ian D. MooreH-Index: 26
Last. Timothy J. McGrathH-Index: 8
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Simplified equations to calculate deflections and circumferential strains in buried thermoplastic pipe have been developed for AASHTO based on soil-structure interaction solutions. These equations are evaluated here using measurements of HDPE and PVC pipe responses in full-scale laboratory tests. The comparison indicates that the equations are suitable design tools for standard flexible pipe installations. Structural stiffness of the pipes may have an influence on the performance of the deflecti...
2 CitationsSource
#1Ashutosh Sutra Dhar (UWO: University of Western Ontario)H-Index: 9
#2Ian D. Moore (Queen's University)H-Index: 26
Baseline data on buried thermoplastic pipe behavior under biaxial loading have been developed in a controlled laboratory environment. Deflections and local wall strains of a lined corrugated high-density polyethylene pipe were determined. Use of the finite element method and simplified design equations was then evaluated relative to the laboratory measurements. Measurements of soil response during the tests were used to evaluate the constitutive response for the soil. The comparisons reveal that...
9 CitationsSource
#2Ian D. MooreH-Index: 26
6 CitationsSource
Thermoplastic pipes are often manufactured with profiled walls to maximize the flexural stiffness of the pipe for a given amount of polymer. Thin elements in the profile can buckle under the influence of large earth pressures associated with deep burial or other extreme loading conditions. Earth load tests have been conducted on high density polyethylene pipes with a number of different wall profiles. Two high-pressure pipe test cells have been used to conduct these tests. Observations of local ...
11 CitationsSource
#1Ashutosh Sutra Dhar (UWO: University of Western Ontario)H-Index: 9
#2Ian D. Moore (UWO: University of Western Ontario)H-Index: 26
8 Citations