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Research Papers: Friction and Wear

Dynamic Analysis and Wear Prediction of Planar Five-Bar Mechanism Considering Multiflexible Links and Multiclearance Joints

[+] Author and Article Information
Gengxiang Wang

Faculty of Mechanical and
Precision Instrument Engineering,
Xi'an University of Technology,
P. O. Box 373,
Xi'an, Shaanxi 710048, China
e-mail: wanggengxiang27@163.com

Hongzhao Liu

Faculty of Mechanical and
Precision Instrument Engineering,
Xi'an University of Technology,
P. O. Box 373,
Xi'an, Shaanxi 710048, China
e-mail: liu-hongzhao@163.com

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received August 12, 2016; final manuscript received November 30, 2016; published online May 17, 2017. Assoc. Editor: Sinan Muftu.

J. Tribol 139(5), 051606 (May 17, 2017) (14 pages) Paper No: TRIB-16-1255; doi: 10.1115/1.4035478 History: Received August 12, 2016; Revised November 30, 2016

Effects of wear and member flexibility on the dynamic performance of a planar five-bar mechanism with joint-clearance are investigated. The equation of motion of the mechanism is derived based on the absolute nodal coordinate formulation (ANCF). In order to enhance the accuracy of the contact force, the slope of the load–displacement curve of the cylindrical joint with clearance is used. The contact deformation couples the joint wear to the contact state. The contact force model of Flores and coworkers is improved, by the introduction of the stiffness coefficient. The wear depth is predicted by using the Archard's wear model. Simulations show that the multiclearance joints can generate stronger contact forces relative to single clearance joint case. This leads to more severe wear in the joint. However, the mechanism with multiple flexible links can absorb more of the energy arising from the clearance joint, and this improves the wear phenomenon.

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References

Figures

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Fig. 1

Two-dimensional shear deformable beam

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Fig. 2

Planar five-bar linkage with clearance

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Fig. 3

A nonideal revolute joint with eccentricity vector d

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Fig. 4

Evolution of the hysteresis damping factor as a function of the coefficient of restitution

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Fig. 5

Comparison between the contact stiffness coefficients

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Fig. 6

Improved contact stiffness coefficient

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Fig. 7

Dynamic performance of the follower l3 in the five-bar mechanism with single clearance joint and single flexible link

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Fig. 8

Dynamic performance of the follower l3 in the five-bar mechanism with two clearance joints and single flexible link

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Fig. 9

Dynamic performance of the follower l3 in the five-bar mechanism with single clearance joint and two flexible links

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Fig. 10

Dynamic performance of the follower l3 in the five-bar mechanism with two clearance joints and two flexible links

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Fig. 11

Wear depth (case 1: single clearance joint; case 2: single clearance joint and single flexible link; case 3: two clearance joints; case 4: two clearance joints and single flexible link; case 5: single clearance joint and two flexible links; and case 6: two clearance joints and two flexible links)

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Fig. 12

Dynamic performance of the five-bar mechanism after wear

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Fig. 13

Wear depth after wear

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