Bjornar Bangstein Avatar

Bjornar Bangstein

Mechanical Engineer

Mechanical Engineer [M.Sc.], part of the new product development [NPD] team for reciprocating and rotating machinery components. Responsible for mechanical product innovation, design, testing and analysis/simulation activities. Further responsibilities include building, maintaining and running test machinery.


Mechanical Engineer  
Cook Compression, October 2015 to Present, Houston, Texas United States
(Manufacturing & Processing)
Mechanical design engineer involved in new product development (NPD), manufacturing, failure analysis and strength analysis of reciprocating compressor components. Work location houses both manufacturing and product refurbishment / repair center which gives unique insight into the product life cycle. Responsibilities include: New Product Development: Development of new product concepts, continuous improvement of existing products and creating strength analysis tools for product engineers. Manufacturing: Improving manufacturing processes to increase quality and reduce cost. Focus on GD&T and conformity assessment. Analysis: Performing failure analysis in components / products, as well as advanced finite element analysis such as impact analysis and fluid-structure interaction.

Engineering Intern  
DNV GL, May 2014 to August 2014, Houston, Texas United States
Assisted project managers and engineers with design verification of various offshore drilling equipment such as sheaves, kelly valves, IBOP’s, tensioner rings, drilling spools and hydraulic cylinders. Design verification was done in accordance with Offshore Standard DNV-OS-E101, DNV 2.7-1/-3, DNV 2.22, API 16C, API 8C. During the course of the internship I gained technical knowledge about components and experience in use of international standards, doing both independent and team oriented work, costumer communication and initiative taking.

Internship Student  
DNV Group (Det Norske Veritas), June 2012 to August 2012, Houston, Texas United States
Design review of propulsion systems including propulsion shaft vibration analysis, fatigue fracture and the theory and design of spring type torsional vibration dampers. Design review was done in accordance DNV Rules for Ship Part 4 Chapter 4 and DNV 41.4. While doing vibrational analysis I gained experience in using DNV software Nauticus Machinery-Torsional Vibration.

Internship Student  
DNV Group (Det Norske Veritas), June 2011 to August 2011, Houston, Texas United States
Participated on surveys at various drilling equipment manufacturers for components such as subsea Christmas trees and risers. Did design review of drilling equipment in accordance with offshore standard DNV-OS-E101 inclusive API 16C.


South Dakota School of Mines and Technology  
Master's degree, Mechanical Engineering, Jan, 2013 to May, 2015
Master of Science degree studies in mechanical engineering. Aimed heavily towards solid mechanics, advanced production methods and fracture mechanics.

Oestfold University College, Norway  
Bachelor's degree, Mechanical Engineering, Jan, 2009 to Jan, 2013
Bachelor of Science degree in Mechanical Engineering focusing on solid mechanics and vibrations.


A Method of Fracture Toughness Measurement And Effect of partial Annealing on Monolithic Thick Cold Sprayed Aluminum 606     
Published by (ASME)
Authors: Bangstein, Bjornar, Ellingsen, Marius, Scholl, Nathan.  Published November 16, 2016

Cold spray is a solid-state material deposition method that can create thick (>10mm) metal layers that adhere metallurgically to a base part or a substrate. Numerous potential applications exist, such as returning worn mechanical parts to their original dimension, extending their service life. For fatigue applications the fracture properties of cold spray deposited material must be known but little to no literature has been found on the fracture behavior of cold spray deposited material alone, which prompted the study presented here . Fracture toughness specimens were manufactured by depositing thick cold-sprayed layers of powdered aluminum 6061 onto an aluminum 6061 substrate using N2 as the carrier gas. The substrate was then machined away, and monolithic miniature compact tension fracture toughness specimens were machined from the cold spray deposit itself, following ASTM E-1820. The fracture behavior of the cold sprayed material was then experimentally determined using the elastic-plastic J-resistance method for compact test specimens described in ASTM E-1820. Two specimen conditions were successfully tested, “as-sprayed” and “partially annealed”. The results are that the Mode-I elastic-plastic stress intensity factor JI has been successfully measured for cold-spray deposited material alone, and that partially annealing a cold-spray deposit can dramatically increase its fracture toughness.