ASME, 5 day classes on Fluid Flow, Piping Design, and Failure Analysis, are taught from "Fluid Mechanics, Water Hammer, Dynamic Stresses, and Piping Design", by R. A. Leishear. Classes are no longer taught routinely, but are available through ASME for in-house training (Leishear Stress Theory: High pressures from water hammer are magnified by dynamic load factors (DLFs) to calculate equivalent pressures and stresses that crack pipes and cause valve leaks). This course is available but is no longer routinely provided by ASME.


Fires and Explosions in Nuclear Power Plants:Computational fluid dynamics (Fluent CFD) investigations and models of nuclear reactor explosions are in process to support Nuclear Engineering PhD Dissertation research. The Three Mile Island meltdown and hydrogen fire models are the final goals of research, using NRC approved computer codes for reactor kinetics, thermal-hydraulics, and accident analysis (Leishear Explosion Theory: Water hammers explode nuclear power plants and damages nuclear plant piping through explosions).


Gas Pipeline Explosions: Discovered that fluid transients cause gas pipeline explosions. Research is in process, and  a series of papers will follow (Leishear Explosion Theory - Fluid transients cause gas pipeline explosions).


Water Main Breaks: Writing a series of papers on the cause of water main breaks, where this cause has been unknown for more than a century - until now. This research is based on my 2013 ASME textbook and the Leishear Stress Theory that describes the cause of piping failures due to water hammer(Leishear Water Main Break Theory - Water hammers cause water main breaks).


Fatigue Corrosion: Invented new theory to describe the complex relationships between fatigue stresses and resultant accelerated corrosion (Leishear Fatigue Corrosion Theory), where this theory is a corollary to known corrosion fatigue theory. Research and publication is process.


Bridge Failures: Discovered that bridge failures may be caused by grit blasting for protective coating adherence, where fatigue limits are lowered by blasting (Leishear Grit Blasting Fatigue Theory: grit blasting causes fatigue failures due to cyclic loads that induce cyclic stresses on bridges).


Fatigue Curves: Discovered that all fatigue curves for piping, pressure vessels, bridges, and machinery are non-conservatively incorrect when grit blasting is used to roughen surfaces for coating adherence (Leishear Grit Blasting Fatigue Theory).



Leishear Engineering, LLC was Established on January 5, 2016.


ONGOING PROJECTS​

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Stop pipe system problems that include: water main breaks, fluid flow problems, pump and compressor failures, controls, and explosions in pipelines / nuclear plants 

LEISHEAR ENGINEERING, LLC

Robert A. Leishear, Ph.D, P.E., PMP

Consulting Engineer, ASME Fellow, Journeyman Sheet Metal Mechanic, Welder, Machinery Electrician

​NACE Senior Corrosion Technologist, NACE Senior Internal Corrosion Technologist, NACE Level 2 Protective Coatings Inspector

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Troubleshooting, Research, Accident and Failure Analysis, and Design for Fluid Systems:

Fluid Flow, Water Hammer, Structures, Piping, Pumps, Instrumentation, and Vibrations