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Timeout for Tech: The Invisible Materials Energy Component

Written by Gary T. Fry, Vice President, Fry Technical Services, Inc.; Railway Age Contributing Editor
Figure 1. A stretched rubber band contains energy that we call “strain energy.” One component of strain energy is the “strain” in the band, which manifests as the band’s visible stretch. The other component of strain energy is “stress” which is invisible. (All illustrations courtesy of Gary T. Fry)

Figure 1. A stretched rubber band contains energy that we call “strain energy.” One component of strain energy is the “strain” in the band, which manifests as the band’s visible stretch. The other component of strain energy is “stress” which is invisible. (All illustrations courtesy of Gary T. Fry)

RAILWAY AGE, OCTOBER 2023 ISSUE: What exactly is stress? It’s a tough—and often-asked—question.

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