This study investigated the grinding force in rotational atherectomy, a clinical procedure that uses a high-speed grinding wheel to remove hardened, calcified plaque inside the human arteries. The grinding force, wheel motion, and ground surface were measured based on a ring-shape bovine bone surrogate for the calcified plaque. At 135,000, 155,000, and 175,000 rpm wheel rotational speed, the grinding forces were 1.84, 1.92, and 2.22 N and the wheel orbital speeds were 6060, 6840, and 7800 rpm, respectively. The grinding wheel was observed to bounce on the wall of the bone surrogate, leaving discrete grinding marks. Based on this observation, we modeled the grinding force in two components: impact and cutting forces. The impact force between the grinding wheel and the bone surrogate was calculated by the Hertz contact model. A multigrain smoothed particle hydrodynamics (SPH) model was established to simulate the cutting force. The grinding wheel model was built according to the wheel surface topography scanned by a laser confocal microscope. The workpiece was modeled by kinematic-geometrical cutting. The simulation predicted a cutting force of 41, 51, and 99 mN at the three investigated wheel rotational speeds. The resultant grinding forces, combining the impact and cutting forces modeled by the Hertz contact and SPH simulation, matched with the experimental measurements with relative errors less than 10%.
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April 2019
Research-Article
Multigrain Smoothed Particle Hydrodynamics and Hertzian Contact Modeling of the Grinding Force in Atherectomy Available to Purchase
Yihao Zheng,
Yihao Zheng
1
Mechanical Engineering,
2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
University of Michigan
,2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
1Corresponding author.
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Yao Liu,
Yao Liu
Mechanical Engineering,
2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
University of Michigan
,2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
Search for other works by this author on:
Yang Liu,
Yang Liu
Mechanical Engineering,
2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
University of Michigan
,2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
Search for other works by this author on:
Albert J. Shih
Albert J. Shih
Mechanical Engineering, Biomedical Engineering,
2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
University of Michigan
,2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
Search for other works by this author on:
Yihao Zheng
Mechanical Engineering,
2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
University of Michigan
,2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
Yao Liu
Mechanical Engineering,
2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
University of Michigan
,2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
Yang Liu
Mechanical Engineering,
2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
University of Michigan
,2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
Albert J. Shih
Mechanical Engineering, Biomedical Engineering,
2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
University of Michigan
,2380 G.G. Brown, 2350 Hayward Street,
Ann Arbor, MI 48109
e-mail: [email protected]
1Corresponding author.
Manuscript received September 19, 2018; final manuscript received December 19, 2018; published online March 1, 2019. Assoc. Editor: Radu Pavel.
J. Manuf. Sci. Eng. Apr 2019, 141(4): 041015 (8 pages)
Published Online: March 1, 2019
Article history
Received:
September 19, 2018
Revision Received:
December 19, 2018
Accepted:
December 19, 2018
Citation
Zheng, Y., Liu, Y., Liu, Y., and Shih, A. J. (March 1, 2019). "Multigrain Smoothed Particle Hydrodynamics and Hertzian Contact Modeling of the Grinding Force in Atherectomy." ASME. J. Manuf. Sci. Eng. April 2019; 141(4): 041015. https://doi.org/10.1115/1.4042603
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