BLOG: Primary Stresses

Stress and Fatigue Analysis of Bellows What is a Primary Stress? Most engineers are familiar with the terms “Normal Stress”, “Shear Stress” and potentially “Equivalent Stress.” However perhaps not so much with the terms “Primary Stress” and “Secondary Stress”. What do these terms mean and why are they important? “Primary Stress” is a term likely …

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Blog: Failure Analysis – The Basics

Failure of a splined clutch power transmission shaft Failure Analysis – the Basics Failures happen, often despite the best efforts of designers, engineers, and fabricators. The first consideration after a component failure should be to check similar in-service components that may exhibit the same type of failure. There are many potential causes of failure – …

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See Resume Summaries of our Senior Engineers

See our Our Team to read resume summaries of our principal engineers. See Also:Who We Serve to see a list of a few of our clientsPopular Links to see what’s trending No Time? – Call Tom O’Donnell

Blog – Finite Element Analysis for the Non-Engineer

FEA Model of Feedwater Heater FEA Model of Pressure Vessel What is finite element analysis? Finite element analysis (FEA) is a computer simulation method useful for evaluating components, structures and systems. It is a versatile and powerful tool that models simple and complex geometries, in conjunction with linear and non-linear materials(1), and variable loading conditions …

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Article on Weld Defects in Stainless Steel World

Weld Defects and Failures: Quantifying Fitness For Service – How Finite Element Mathematical Simulations can Mitigate Risk and Cut Costs Article by Dr. William J. O’Donnell, PE, President – O’Donnell Consulting Engineers Fatigue in Welded steel components is often initiated by mathematical vibration, corrosion and thermal cycling. Fitness for service analysis is the most viable …

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OCE Forensic Investigation in the News

GlobalSpec Article on a forensic investigation O’Donnell Consulting performed on a ductwork failure in a Pittsburgh-local school. Call Tom O’Donnell to Discuss Your Forensic Engineering Issues

See Updates to OCE Portfolio Page

Check out our Portfolio Page of projects – we are continually adding to it. Above is a model for a base skid containing a Vapor Recovery Unit that we performed a structural analysis.

Links Page Updated

We have updated our Links Page which lists of professional societies, engineering books and resources, and as well as other links of interest.

Book Release – Handbook of Lessons Learned in Engineering

Bill O’Donnell, Sr., recently published “Handbook of Lessons Learned In Engineering, Design, Manufacturing and Construction.” It is intended for engineers, designers, manufacturers and constructors – depicting failures from thermal, structural, vibration, corrosion and other failure mechanisms. Read a sample of this book, Section 1 Designers’ Lessons. This book can be purchased at

Small Modular Reactors Gain Momentum in Europe

GE Hitachi Nuclear Energy (GEH) and NuScale Power, two leading companies in the race to build small modular reactors (SMRs) for power generation, have recently announced deals that could result to new plants being constructed in Europe. See the Power Magazine article.

See our Contact Page to Submit an Inquiry

We provide engineering design, analysis and troubleshooting services to the Petrochemical, Mining, Materials, Transportation, Aerospace, Power and other industries. See our Contact Page to Submit an Inquiry.

Advantages of Dual Linear Array Probes for Corrosion Inspection

Advantages of Dual Linear Array Probes for Corrosion Inspection. The power generation industry is among those whose aging infrastructure contributes to increased safety concerns, and can lead to costly unscheduled maintenance and shutdowns. Facilities must be vigilant about monitoring corrosion in their in-service pipes and vessels to help ensure their integrity. Read the Power Magazine …

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Don’t Let Vibrations Shake Up Operations

The reliability and integrity of equipment, structures and piping can suffer because of vibration and dynamic responses. These depend mainly on excitation forces, stiffness, mass distribution and damping. Modal analysis, which focuses on natural frequencies and associated modal shapes, provides an important tool in understanding potential issues. Indeed, usually the first step in checking for …

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IEA World Energy Outlook 2019

IEA World Energy Outlook 2019. Solar photovoltaic (PV) could surge ahead of coal and gas and become the largest source of installed power capacity in the world by 2035 if countries pursue stated policies and targets, the International Energy Agency (IEA) said in its newly released World Energy Outlook 2019 (WEO2019). See the Power Magazine …

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