The efficiency of the finite strip method (FSM) in modeling the varying dynamics of shell-like structures during machining operations is investigated. The workpiece is modeled as a shallow, helicoidal, cantilevered shell, and the natural modes are computed using FSM. In the FSM solution, the workpiece is discretized only in the chordwise direction, and the membrane and bending displacement fields of the shell in the spanwise direction are approximated by a set of basis functions that satisfy clamped-free boundary conditions. The displacement fields in the chordwise direction are approximated using polynomial functions. The efficiency of the presented FSM is investigated by comparing the computed natural vibration modes against the ones obtained using the finite element method (FEM). The FSM model was found to yield results of greater or comparable accuracy, even with up to 40% fewer degrees-of-freedom (DOFs). Also, the accuracy of the presented model is verified by comparing the predicted frequency response functions (FRFs) against the FRFs that were measured by conducting impulse hammer tests in various stages of machining a generic curved blade.
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April 2018
Research-Article
Finite Strip Modeling of the Varying Dynamics of Shell-Like Structures During Machining Processes
J. Stefani,
J. Stefani
Department of Mechanical Engineering,
University of Victoria,
Victoria, BC V8P 5C2, Canada
e-mail: josiahstefani@gmail.com
University of Victoria,
Victoria, BC V8P 5C2, Canada
e-mail: josiahstefani@gmail.com
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K. Ahmadi,
K. Ahmadi
Department of Mechanical Engineering,
University of Victoria,
Victoria, BC V8P 5C2, Canada
e-mail: kvahmadi@uvic.ca
University of Victoria,
Victoria, BC V8P 5C2, Canada
e-mail: kvahmadi@uvic.ca
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O. Tuysuz
O. Tuysuz
Manufacturing Automation Laboratory,
Department of Mechanical Engineering,
University of British Columbia,
Vancouver, BC V6T 1Z4, Canada
e-mail: oguzhan.tuysuz@alumni.ubc.ca
Department of Mechanical Engineering,
University of British Columbia,
6250 Applied Science Lane
,Vancouver, BC V6T 1Z4, Canada
e-mail: oguzhan.tuysuz@alumni.ubc.ca
Search for other works by this author on:
J. Stefani
Department of Mechanical Engineering,
University of Victoria,
Victoria, BC V8P 5C2, Canada
e-mail: josiahstefani@gmail.com
University of Victoria,
Victoria, BC V8P 5C2, Canada
e-mail: josiahstefani@gmail.com
K. Ahmadi
Department of Mechanical Engineering,
University of Victoria,
Victoria, BC V8P 5C2, Canada
e-mail: kvahmadi@uvic.ca
University of Victoria,
Victoria, BC V8P 5C2, Canada
e-mail: kvahmadi@uvic.ca
O. Tuysuz
Manufacturing Automation Laboratory,
Department of Mechanical Engineering,
University of British Columbia,
Vancouver, BC V6T 1Z4, Canada
e-mail: oguzhan.tuysuz@alumni.ubc.ca
Department of Mechanical Engineering,
University of British Columbia,
6250 Applied Science Lane
,Vancouver, BC V6T 1Z4, Canada
e-mail: oguzhan.tuysuz@alumni.ubc.ca
Manuscript received June 20, 2017; final manuscript received January 12, 2018; published online February 14, 2018. Assoc. Editor: Satish Bukkapatnam.
J. Manuf. Sci. Eng. Apr 2018, 140(4): 041015 (10 pages)
Published Online: February 14, 2018
Article history
Received:
June 20, 2017
Revised:
January 12, 2018
Citation
Stefani, J., Ahmadi, K., and Tuysuz, O. (February 14, 2018). "Finite Strip Modeling of the Varying Dynamics of Shell-Like Structures During Machining Processes." ASME. J. Manuf. Sci. Eng. April 2018; 140(4): 041015. https://doi.org/10.1115/1.4039107
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