AWhat changed
Hertz solves the local frictionless contact of smooth isotropic elastic solids, obtaining an elliptical pressure patch and nonlinear load-indentation scaling, with a conditional quasi-static collision application.
Scientific scope
Hertz solves the local frictionless contact of smooth isotropic elastic solids, obtaining an elliptical pressure patch and nonlinear load-indentation scaling, with a conditional quasi-static collision application. The contact theory assumes small deformation, elastic materials, smooth local surface geometry and the stated frictionless contact approximation. Adhesion, plasticity, large deformation and arbitrary rough contacts are outside it. Predicted contact shape/pressure depend on material and geometry assumptions; this is not a universal wear law or independently reproduced experiment.
Evidence
Source-linked, scoped account of the original work. The published scope states the scientific assumptions and remaining verification limits. WRS has not independently certified the full proof, experimental result or system benchmark.
Contributors
- Heinrich Hertz · SCIENCE: Original source-listed scientific author of this scoped work; byline does not determine effort fractions.
- Heinrich Hertz: Ueberdie Beruehrungfesterelastischer Koerper, original 156-171
- Komvopoulos 2008: roughness/frictionalheating contact extension context
Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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