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Memorial Tributes Volume 24 (2022) / Chapter Skim
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LEON M. KEER
Pages 200-207

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From page 201...
... Murphy Professor Emeritus of Civil and Environmental Engineering and Mechanical Engineering at Northwestern University and a leader and prolific ­researcher on contact and fracture mechanics and tribology, died January 12, 2021, at the age of 86. Born September 13, 1934, in Los Angeles to William and Sophie Keer, Jewish Ukrainian immigrants, he grew up and attended school in the Beverly/Fairfax area.
From page 202...
... Back stateside, Leon spent a year as a preceptor at Columbia University and then joined the Northwestern University faculty in 1964 as an assistant professor in civil engineering. He remained there for more than 55 years.
From page 203...
... Goodman on the elastic contact problem of a sphere indenting a cavity with a slightly larger radius, which extended the Hertz contact theory to allow the contact length to be a significant fraction of the size of the con tacting spheres1; with Michael Bryant on the Cattaneo-Mindlin seminal solution for contacting elastic spheres subjected to a tangential load that is too small to cause gross sliding, applied to ellipsoidal bodies and other engineering applications2; on the Mindlin field for a concentrated force at an interior point of a half-space, or the Rongved field for a force at a point within one of two joined half-spaces, setting up integral equations for three-dimensional crack problems; with Nasser Ahmadi and Toshio Mura on a technique to calculate the subsurface elastic strain in a half space3; with Igor Polonsky on solving rough-surface contact problems with the conjugate gradi ent method4; and on the singular stress field near the tips of ­conical notches.5 1  Goodman LE, Keer LM.
From page 204...
... His analysis provided the basis for interpreting an indentation test, still in use, that enhanced understanding of testing procedures for articular cartilage and was critical in the development of controlled testing procedures. He developed analytical methods to determine whether isolated pressurized cracks intersect joints, by using elasticity to model the process of hydraulic fracturing.
From page 205...
... He delighted in Monty Python, Tom Lehrer, and the Bonzo Dog Doo-Dah Band. He and Barbara traveled around the world, attending conferences and extend ing their trips with visits to see friends, colleagues, and former 6  Wang Z, Jin X, Keer LM, Wang QJ.
From page 206...
... Northwestern's engineering community will long remember Professor Leon Keer's charismatic smile that shone with his wisdom, kindness, and relish for life.


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