Ajoy Kumar Das, Ph.D., P.E. Email & Phone Number

Veghel, Noord Brabant, Nl

Perry, Florida, Us

Research on structural framing configuration, stability and detailed structural analysis and design of large span buildings covered by high-strength vinyl fabrics including connections, bracings, and foundation systems.

Building Information Modeling, structural analysis and design for multi-story buildingsConduct research on construction technology and materials of existing historical structuresStructural condition assessment, retrofitting and strengthening for renovation and upgradation

Patentable Engineering Product Research & Development, Vibration Testing, and Validation for Tool Pedestal Systems for Vibration Sensitive Equipment used in Semiconductor Processing, Chemical and Biomedical Industries. Structural Design and Analysis of Large Commercial Buildings and Retail Stores.Development of AutoCAD Structural Drawings, Preparation of Detail Sheets for Metal Fabrication, and Erection Drawings for Site Installation.Material Procurement, Project Management, and Site Supervision. Business Development.

Aberdeen, Gb

Design and Analysis of Oil&Gas Energy Structures - Performed global analyses (linear and nonlinear) of a variety of Oil&Gas energy structures such as deepwater risers (SCR, SLWR, and TTR), pipelines, and mooring lines. The analyses entailed conducting finite element analysis (FEA) of the entire systems in order to determine dynamic responses of the systems. Dynamic loads included wind, wave, current, vortex induced vibration (VIV), and vessel motion.Design Validation and Health Monitoring Subsea Structures - Conceptualized a big data processing tool in MATLAB for the design validation, condition evaluation, and monitoring of marine risers and wellheads. The tool takes low-frequency vibration measurements in terms of acceleration and angular rates as the inputs and performs a series of steps comprising of determination of frequency contents using PSD plots, removal of DC bias, low-frequency trends and high-frequency noise, data transformation from local to global coordinate system, numerical integration to calculate displacements, and finally provides fatigue damage accumulations as the outputs.FEA-based Structural Modeling and Thermal Analysis – Developed a FEA-based heat transfer model in ABAQUS for a manifold piping system with multiple possible entry locations of hot fluid and checked if temperature at a specified slot will remain below the rating temperature during hydrate remediation process.Complex Non-linear Analysis and Code Development - Implemented synthetic mooring line analysis capability within the commercial software Flexcom, written in FORTRAN. Synthetic polymer rope exhibits non-linear load-elongation behavior that is dependent on mean load, load range, temperature, rate of loading and load history.Validated the mooring line analysis capability of Flexcom by comparing static and dynamic analyses results with hand calculation and AQWA results.

Tucson, Arizona, Us

Vibration Response Measurement, Signal Processing, and Health Monitoring of Structures and Machinery - Conducted multidisciplinary R&D to conceptualize and develop novel nondestructive procedures for the health monitoring of new or existing structures and machinery, which are represented as dynamic systems. The procedures calculate the stiffnesses of all the elements in the finite element models of the dynamic systems by using the noise-contaminated uncertain vibration responses measured by accelerometers. First, the responses are post-processed using a series of steps comprising of determination frequency contents using PSD plots, removal of DC bias, low-frequency trends and high-frequency noise, and physics-based numerical integration to obtain velocity and displacement responses. At the second step, using the finite element based dynamic models and Kalman filter-based advanced data processing technology, all the stiffnesses are identified. Reduction of stiffness of element(s) indicates structural damage.FEA-based Evaluation of Stress Intensity Factor for a Thick plate with a Center Crack - Developed FEA model of the plate in ANSYS software using a combination of 2D triangular and quadrilateral elements. Calculated stress intensity factor using displacement extrapolation technique and J-integral method. The objective was to see how the crack tip stress intensity factors are affected by the two methods.

Tucson, Arizona, Us

Taught over 500 undergraduate students in over ten fundamental courses, including Engineering Graphics (using AutoCAD and MicroStation), Statics, Mechanics of Materials, Fluid Mechanics, Probability and Statistics, Numerical Methods, and Engineering Economics. Developed course contents, delivered lectures in classroom, helped students during office hours and by emails, graded assignments and exams, and assigned final grades. Developed excellent proficiency in systematic presentation of technical materials easily understandable to students. At the end of the semesters, students provided very high rating about the courses I have taught.

Tucson, Arizona, Us

Structural Forensic Engineering, Structural Assessment, and Report Writing - Conducted field visits for structural forensic engineering of existing buildings, houses, churches and cathedrals built of concrete, wood, and masonry. Took detailed investigation notes and photographs on the geometry, existing damages, cracks, past alterations, water intrusions, roof damage, and construction defects. Built detailed analysis models based on available drawings and field notes, and analyzed applying engineering principles and practices to determine the building system damages, failure modes, and overall structural integrity. Wrote reports on structural condition based on the field notes, photographs and root cause analysis.Solid Modeling and Seismic Safety Assessment of a Historical Masonry Building - Constructed FEA model of a single bay of Mallorca Cathedral, a historical masonry structure built between 1300 and 1601 AD. Used 4-node tetrahedral elements for 3D macro-modeling and meshing of the geometry. Designed smooth transition between small to large elements with the help of transitional elements in order to capture continuity of stresses and strains at critical areas where damage/crack or material crushing was expected. Modeled nonlinear constitutive behavior of all the constituent materials based on a tension-compression distributed damage model. Performed nonlinear static analyses considering static vertical and lateral loading applied step by step until collapse. Assessed lateral load carrying capacity of the cathedral based on Capacity Spectrum Method (CSM), satisfying the site-specific demand seismic acceleration spectrum.

Kolkata, West Bengal, In

M. N. Dastur & Company (P) Ltd. provides integrated design and engineering consultancy services from concept to completion for metallurgical and allied industries, mining, chemical, cement, power, environment and infrastructure. While working as a Civil Structural Engineer in this company, I gained extensive experience in structural design of a variety of structures and production of construction drawing in AutoCAD. Structural Design and Analysis of Buildings, Foundations, Culverts, Rigid Pavement, and Special Structures - Performed feasibility study, developed and reviewed design basis, executed analysis in STAAD, performed detailed structural design ensuring conformance with engineering design standards (such as IBC, ASCE, ACI, AISC, ANSI, ASTM, and AASHTO), prepared design reports, and developed design sketches and construction drawings in AutoCAD. Some challenging projects included the design of lowering wells (stacking tubes), culverts, chimneys, and equipment foundations.

Doctor Of Philosophy, Civil Engineering (Major: Structural Engineering; Minor: Engineering Mechanics)

Master Of Science, Civil Engineering (Major: Structural Engineering)

Bachelor Of Engineering, Civil Engineering