Browsing by Author "Bangaru, P."

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Design and Fabrication of Block Stiffened Frame
    (The Aeronautical and Astronautical Society of the Republic of China, 2025) Bangaru, P.; Kaliveeran, V.; Raveesh, R.M.; Palanikumar, P.; Kundapura, S.
    This research introduces a block-stiffened frame for accurate load measurements by reinforcing SS304 rigid blocks along SS304 thick strips. The frame achieves variable stiffness without recalibration, making it more adaptable. Rectangular rosettes are mounted along the longitudinal direction of the frame to measure transverse or tangential loads. Stress analysis is carried out using both finite element analysis (FEA) and experimental methods with both essential and non-essential boundary conditions. Specific locations on the outer surfaces of the block-stiffened frame are examined to compare stress results from finite element analysis and experiments, which confirms a strong agreement between the two methods. The results demonstrate that the frame remains stable under repeated loadings, making it suitable for multiple applications, especially in aerospace structures. Unlike conventional stiffened beams, this novel design easily adjusts stiffness, making load calibration flexible, efficient and adaptable. © 2025 The Aeronautical and Astronautical Society of the Republic of China. All rights reserved.
  • No Thumbnail Available
    Item
    Development and Performance Evaluation of a Block-Stiffened Fretting Fixture for Accurate Load Transfer in Fretting Tests
    (Springer Science and Business Media Deutschland GmbH, 2025) Bangaru, P.; Kaliveeran, V.; Raveesh, R.M.; Kundapura, S.
    This study introduces a novel fretting fixture designed for fretting and full sliding tests, which minimizes recalibration and integrates multiple sensors for measuring contact tractions. The fixture features an additional “Z”-type supporting structure that enables horizontal chassis length adjustments and is compatible with various fatigue testing machines. Adjustable components, such as vertical stiffeners reinforced with rigid blocks, facilitate achieving the target Load Transfer Ratio (LTR) of 50%. The LTR can be adjusted by repositioning the rigid blocks using a bolt-nut assembly. The fretting tests are conducted with and without blocks attached to the vertical stiffeners. Finite Element Analysis (FEA) and experimental methods are employed to ealuate the LTR, yielding results of 59–60% and 58–59%, respectively. Supported by FEA and experimental validation, the fixture demonstrates effectiveness and reliability for fretting studies. The stiffened fretting fixture is evaluated under higher normal loads and increased frequencies, showing a notable increase in the Q/P ratio. This increase highlights intensified surface interaction and pronounced tribological effects. © The Society for Experimental Mechanics, Inc 2025.