Energy Dissipation Analysis for Elastoplastic Contact and Dynamic Dashpot Models

Wang, Gengxiang; Liu, Caishan; Liu, Yang

doi:10.1016/j.ijmecsci.2022.107214

Cited by 15 publications

(2 citation statements)

References 69 publications

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“…For real engineering applications the next research step should be the careful revision of physical formulations in the scope of classical thermomechanics, together with the analysis of related mathematical and numerical problems, namely the proper study of energy dissipation on contacts, independently introduced by [28] and [31]. Such dissipation can be accompanied by the formation of plastic or microscopic damage zones, followed by the initiation and development of macroscopic cracks and further phenomena, dangerous for the bearing ability and durability of materials and structures.…”

Section: Discussionmentioning

confidence: 99%

On a computational approach to multiple contacts / impacts of elastic bodies

Vála¹,

Rek²

2023

Programs and Algorithms of Numerical Mathematics 21

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The analysis of dynamic contacts/impacts of several deformable bodies belongs to both theoretically and computationally complicated problems, because of the presence of unpleasant nonlinearities and of the need of effective contact detection. This paper sketches how such difficulties can be overcome, at least for a model problem with several elastic bodies, using i) the explicit time-discretization scheme and ii) the finite element technique adopted to contact evaluations together with iii) the distributed computing platform. These considerations are supported by the references to useful generalizations, motivated by significant engineering applications. Illustrative examples demonstrate this approach on structures assembled from a finite number of shells.

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Section: Discussionmentioning

confidence: 99%

On a computational approach to multiple contacts / impacts of elastic bodies

Vála¹,

Rek²

2023

Programs and Algorithms of Numerical Mathematics 21

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“…Figure 5 shows that when the rigid spherical indenter is in contact with the plane of the plate, the plate is like a rubber pad that will have a certain elasticity and damping, with the interior of the plate being equivalent to the spring stiffness factor k 2 and damping c 2 , together forming a parallel spring-vibration system, where δ the indentation of the half-space and a the real radius of contact area, R 1 is the radius of the spherical indenter, R 2 = ∞ the radius of the half-space, and E 1 , E 2 , υ 1 , υ 2 are the elastic modulus and Poisson’s ratio of half-space body and sphere, respectively. 42,43…”

Section: Methodsmentioning

confidence: 99%

Analysis of the residual stress and surface morphology of TI6AL4V using elastoplastic contact ultrasonic rolling

Jiahui

Jiayuan

Wang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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As ultrasonic rolling mainly affects the residual stress and surface morphology of Ti6Al4V, it is of great significance to study different process parameters, such as amplitude, static pressure, time, and step length, thereby improving the performance of Ti6Al4V. However, unstable bouncing caused by the elastic relationship between the indenter and the sample is inevitable. Based on finite-element analysis and Hertz contact theory, the concept of critical damping was proposed to quickly stabilize the system. Therefore, a three-dimensional finite-element model was established using the ABAQUS software, after which the ultrasonic-rolling process was simulated by applying static pressure on the sample surface using a spring. Then, the distribution of residual stress under different amplitudes, static pressures, times, and step lengths was analyzed. Based on simulation and experimental results showed that the maximum residual stress of −689.802 MPa was obtained when the amplitude, static pressure, and time were 10 µm, 600 N, and 0.064 s, respectively. When the step length was 1/2 of the indentation width, the surface stress concentration was obvious, convex defects were large, and surface roughness Ra increased to 1.076 µm. Investigations also revealed that when the step length was 1/8, Ra decreased by 39.68% compared with that when the step length was 1/2, the thickness of the plastic-deformation layer reached 56.07 µm. When the step length was 1/10, the maximum compressive residual stress reached −888.007 MPa and Ra increased. On the basis of the abovementioned optimization parameters, the influence of step length on the properties of Ti6Al4V alloy was further explored, and direction for the strengthening process of Ti6Al4V alloy by studying the pattern of surface strengthening was presented.

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Determination of effective mass for continuous contact models in multibody dynamics

Nikravesh

Poursina

2022

Multibody Syst Dyn

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Energy Dissipation Analysis for Elastoplastic Contact and Dynamic Dashpot Models

Cited by 15 publications

References 69 publications

On a computational approach to multiple contacts / impacts of elastic bodies

On a computational approach to multiple contacts / impacts of elastic bodies

Analysis of the residual stress and surface morphology of TI6AL4V using elastoplastic contact ultrasonic rolling

Determination of effective mass for continuous contact models in multibody dynamics

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