Abstract
NUMBERS 726 and 727 of Hermann's “Actualités scientifique et industrielle” (Paris) deal with tests of materials and are entitled “La Structure et la Déformation des Solides” and “Essais des Métaux”, respectively, the former of fifty pages (18 francs), the latter of seventy pages (25 francs), both well, illustrated. They are written by M. R. L'Hermite, assistant director of the Laboratory for Buildings and Public Works, Paris, and represent his lectures delivered at the Laboratory in 1937 and 1938. He emphasizes the influence of the fine structure of materials on their elastic properties and devotes half the first volume to microscopic and X-ray methods and their results. In the section on the deformations produced by applied forces he makes use of the Mohr-Caquot diagrams and theory, and ascribes deviations of experimental results from the theory to want of isotropy. In the second volume many of the newer forms of machines for testing metals under tension, compression, shear, bending and shock are described, as well as methods of testing hardness, wear and fatigue. The principal results obtained are given and are related to the Mohr theory.
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Tests of Materials. Nature 144, 189 (1939). https://doi.org/10.1038/144189b0
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DOI: https://doi.org/10.1038/144189b0