scholarly journals Numerical investigation on the elastic–plastic transition of a cylindrical coating/substrate composite under normal compression

RSC Advances ◽  
2017 ◽  
Vol 7 (25) ◽  
pp. 15527-15535 ◽  
Author(s):  
Yongtao Mu ◽  
Ming Liu ◽  
Yongqiang Zhao
Keyword(s):  
Numerical Investigation ◽  
Elastic Plastic ◽  
Rigid Plane ◽  
Normal Compression ◽  
Coated Cylinder

Numerical investigation on the plastic initiation of a coated cylinder in contact with a rigid plane.

Rotor Dynamic Analysis of Tie-Bolt Fastened Rotor Based on Elastic-Plastic Contact

2011 ◽  
Author(s):  
He Peng ◽  
Zhansheng Liu ◽  
Guilong Wang ◽  
Min Zhang
Keyword(s):  
Contact Stiffness ◽  
Contact Model ◽  
Elastic Contact ◽  
Critical Speeds ◽  
Elastic Plastic ◽  
Equivalent Bending Stiffness ◽  
The Difference ◽  
Rigid Plane ◽  
Contact Situation ◽  
Rotor Dynamic

The tie-bolt fastened rotor which is assembled by rods distributed circumferentially is modeled and analyzed by finite element method with the consideration of elastic-plastic contact between discs. Based on elastic-plastic contact model between an elastic hemisphere and a rigid plane, the contact between discs is investigated by the statistical contact model of rough surfaces, and the contact stiffness is derived. The equivalent bending stiffness between discs is acquired. With the increase of the load between the two contact surfaces, the difference between the contact stiffness of purely elastic contact and elastic-plastic model is compared. With the obtained contact stiffness, the equation of motion for the tie-bolt fastened rotor system is formed and the critical speeds are calculated. It indicates that the contact stiffness between discs increases as the load increases. The contact stiffness of elastic-plastic contact model is lower than that of the elastic contact model, and the difference between the two models increases with load. With the stiffness of elastic-plastic contact, the critical speeds of tie-bolt fastened rotor are lower than that of the pure elastic contact situation.

Elastic-Plastic Microcontact Model for Elliptical Contact Areas and Its Application to a Treillis Point in Overhead Electrical Conductors

2011 ◽  
Vol 133 (1) ◽  
Author(s):  
Frédéric Lévesque ◽  
Sylvain Goudreau ◽  
Louis Cloutier
Keyword(s):  
Contact Force ◽  
Critical Points ◽  
Contact Area ◽  
Transmission Lines ◽  
Electrical Transmission ◽  
Contact Areas ◽  
Elastic Plastic ◽  
Elliptical Contact ◽  
Rigid Plane ◽  
Electrical Conductors

Aeolian vibrations represent a threat to the integrity of electrical transmission lines. The fretting fatigue of conductors is thus a major concern. The modelization of the contact conditions at critical points is an important tool in assessing the life of conductors. Treillis points around the last point of contact between the conductor and the pieces of equipment are such critical points. We observe a fully plastic contact condition at these points. Finite element results for the contact between an ellipsoid and a rigid plane and between two wires at different angles are compared with an elastic-plastic microcontact model for elliptical contact areas. These numerical results are then compared with experimental ones for the contact between two wires of a conductor (ACSR Bersfort), showing a very similar relationship between the contact force and the observed contact area. We have a good correlation between the microcontact model and the finite elements ones in the fully plastic contact regime on both the contact area and the contact force for a given interference between bodies. The use of the elastic-plastic microcontact model for elliptical contacts presented in this paper proves to be a strong tool in getting a better understanding of the mechanical behavior at those critical points.

Elastic–plastic behavior of a semicircular frame being pressed against a rigid plane

2008 ◽  
Vol 24 (4) ◽  
pp. 419-432 ◽  
Author(s):  
X. W. Zhang ◽  
J. L. Yang ◽  
T. X. Yu
Keyword(s):  
Plastic Behavior ◽  
Elastic Plastic ◽  
Rigid Plane

Elastic-Plastic Contact Analysis of a Deformable Sphere and a Rigid Flat with Friction Effect

2013 ◽  
Vol 644 ◽  
pp. 151-156 ◽  
Author(s):  
Li Wang ◽  
Yang Xiang
Keyword(s):  
Plastic Deformation ◽  
Contact Area ◽  
Contact Load ◽  
Deformation Analysis ◽  
Elastic Plastic ◽  
Friction Effect ◽  
Finite Element Software ◽  
Plastic Deformation Process ◽  
Rigid Plane ◽  
The Impact

Elastic-plastic deformation analysis of the deformable sphere and the rigid plane was studied using the finite element software,this paper was focused on the impact of the friction effects on the deformation of the elastic-plastic deformation under considering the material strain stiffening properties,studies have shown that，the strain stiffening feature increases the contact load while reducing the contact area，the friction effect reduce both the contact load and contact area during elastic-plastic deformation process of the deformable sphere with increasing contact interference.

scholarly journals A numerical investigation of spherical void growth in an elastic–plastic continuum

2012 ◽  
Vol 64 ◽  
pp. 38-40 ◽  
Author(s):  
M. Leonard ◽  
N. Murphy ◽  
A. Karač ◽  
A. Ivanković
Keyword(s):  
Numerical Investigation ◽  
Void Growth ◽  
Spherical Void ◽  
Elastic Plastic
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