Omer Blodgett

Senior Design Consultant,
Lincoln Electric

Omer W. Blodgett earned bachelor degrees in metallurgical engineering (1941) and mechanical engineering (1974) from the University of Minnesota. He accepted a position with Lincoln Electric Co. in Cleveland in 1945 and today is a senior design consultant for the same company. He is recognized nationally and internationally as an expert in the design of welded connections and has been influential in the development of national standards to the code of the American Welding Society. He is the author of several significant papers on sizing welds, control of distortion, brittle fracture, and fatigue. He is particularly well known for two books Design of Welded Structures and Design of Weldments. Which, even though originally published over 40 years ago, are considered to form the foundation for the entire field of design for welding. He is the recipient of numerous awards, including the Lifetime Achievement Awards from the American Institute of Steel and the T.R. Higgins Lectureship Award. He received an honorary Doctor of Science degree from LeTourneau University and in 1999 Engineering News Record identified him as one of the top 125 engineers in the past 125 years.

Dimensional Analysis and Welding Costs
I first learned about dimensional analysis from my grandfather. He taught me a simple way to verify that mathematical calculations were done correctly:
Concave Welds A Lesson Learned in the School of Hard Knocks
Techniques for avoiding cracking when making concave fillet and groove welds
Tack Welds Deserve Respect
In Part 1, we examined tack welds in general and discussed tack welds made in the weld joint. This month, we'll consider in detail some toughness-related
Tack Welds Deserve Respect
As we have done in recent months, we will continue to focus on the little details that can cause problems, this time looking at tack welds. Let's start
Creating a grand finale: Fillet weld termination
The joint is 10 in. long. How long should the fillet weld be if it is expected to be full length? The question is simple, but the answer is a bit more
Blodgett's Basics: Good weld design is in the details
The famous German architect Ludwig Mies van der Rohe reportedly said God is in the details. Others have morphed his words into another saying: The devil
Blodgett’s Basics
The moment of inertia of the cross-section of a structural member measures the resistance to rotation provided by the section. Expressed as (I), the moment
Re-examining Intermittent Fillet Welds Part 1
Intermittent fillet welds are used in some work where the loads are small. They reduce the cost of welding and also reduce distortion.
Don't forget to ask Why?
In our fast-paced world, engineers may find the answer and solve a problem without ever asking the question This is too bad, because the correct answer
No Twisters or Swingers Allowed
In Part I, we examined the behavior of weldments that are subject to torsion, and learned that under such conditions, the designer should use closed sections wherever possible
Dont Get All Twisted Up
Weldments frequently are subject to torsional loading. Unfortunately, designers often overlook such loading. Even when torsional loading is recognized,
When weld size alone isnt enough
When designing a weldment, determining the proper weld size is important, but sometimes, this isnt enough. Load path and weld orientation can also be
Getting the Most From Each Pound of Weld Metal
As we consider some options, three principles of weld design will be illustrated and in the process, well learn how to get the most out of each pound
Blodgetts Basics
Editors Note: Omer W. Blodgett turns 90 on November 27, 2007. To celebrate, a few of his many friends and colleagues have taken over his customary space
Make it stiffermake it weaker
Can it be that by making an assembly stiffer, the designer can simultaneously make it weaker? In an example from my experience, the challenge the designer

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