STATIC STRESS MEASUREMENTS ON A HIGHLY-SKEWED PROPELLER BLADE.
NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER WASHINGTON D C
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Static stresses were measured in a highly skewed marine propeller blade using a specially constructed pressure chamber which allowed the blade to be loaded under air pressure. The measured stress distribution was radically different from those previously measured on unskewed blades. The highest stresses occurred in a relatively narrow band extending from near the trailing edge at the blade root to near the leading edge at 90-percent radius. For a uniform pressure loading of 1.0 psi, the maximum measured principal stress was 2200 psi in compression and 1800 psi in tension. The maximum radial stress calculated by beam theory for the equivalent unskewed propeller was 910 psi both in tension and compression. Author
- Marine Engineering