Results 21 to 30 of about 1,756,460 (284)

Formulae for frictional resistance considering mud thixotropy and pipe-soil contact characteristics

Yantu gongcheng xuebao, 2017
The jacking force is the crucial parameter for the design and construction of pipe jacking projects. It is controlled by the lateral frictional resistance of pipe jacking and affected by the characteristics of pipe-soil contact and pipe-mud contact.
ZHANG Peng , TAN Li-xin , MA Bao-song
doaj   +1 more source

A Novel Experimental Test Bench to Investigate the Effects of Cutting Fluids on the Frictional Conditions in Metal Cutting

Journal of Manufacturing and Materials Processing, 2020
The tribological effect of cutting fluids in the machining processes to reduce the friction in the cutting zone is still widely unknown. Most test benches and procedures do not represent the contact conditions of machining processes adequately ...
Thomas Lakner, Marvin Hardt
doaj   +1 more source

Contact Hamiltonian Description of 1D Frictional Systems

Communications in Advanced Mathematical Sciences, 2021
In this paper, we consider contact Hamiltonian description of 1D frictional dynamics with no conserved force. Friction forces that are monomials of velocity, and sum of two monomials are considered.
Furkan Semih Dündar, Gülhan Ayar
doaj   +1 more source

Ultrasonic Reflection for Measurement of Oil Film Thickness and Contact between Dissimilar Materials [PDF]

, 2012
The contact between dissimilar materials occurs in many machine elements where one of the contacting parts is manufactured from low modulus materials such as lip seals, o-rings, and metal on polymer prosthetic hip joints.
Gasni, Dedison
core   +6 more sources

Contact problems with friction: models and simulations [PDF]

Simulation Modelling Practice and Theory, 2003
This article deals with the modeling and the numerical simulation of contact and friction problems. Some friction formulations are proposed and numerical methods of resolution by finite elements are presented. Two methods are more particularly developed.
openaire   +2 more sources

Influence of Heterogeneous Contact Stiffness and Heterogeneous Friction Coefficient on Frictional Squeal

Shock and Vibration, 2018
Contact stiffness and friction coefficient are excitation sources and key influencing factors to frictional squeal with obvious inhomogeneous characteristic that is always neglected.
Lijun Zhang, Wenbo Li, Dejian Meng
doaj   +1 more source

Flexural Behavior of 3D‐Printed Porous Bouligand‐Structured Polymers: Influence of Pitch Angle and Porosity

Advanced Engineering Materials, EarlyView.
This study examines how helicoidal architectures with different porosities respond to bending. Adjusting layer angle and spacing in 3D‐printed polymers reveals clear tradeoffs between stiffness, strength, and energy absorption. Experiments and simulations highlight designs that distribute stress effectively, offering pathways for optimizing lightweight
Praveenkumar Subhash Patil, Edward D. McCarthy, Parvez Alam   +2 more
wiley   +1 more source

Discrepancies Between Micro Versus Macroscale Viscoelastic Properties in a Microplastic‐Tissue Composite Model

Advanced Engineering Materials, EarlyView.
This study explores the discrepancies between bulk mechanics and spatial mapping in a tissue‐mimetic hydrogel model. Microplastic particles create localized stiff mechanical microenvironments that are detectable by cellular‐scale nanoindentation but leave bulk properties unchanged as measured by rheology.
Ahron T. Verschleisser, Baptiste Le Roi, Omri Leshem, Joshua M. Grolman   +3 more
wiley   +1 more source

Bifurcation shifts in a rotor-stator contact system under frictional forces to higher rotational speeds caused by stator thickness

Mechanical Engineering Journal
Accurate simulations of detrimental vibrations observed in a rotor-stator contact system are beneficial. Existing contact models that consider the contact configurations between the rotor and stator cannot deal with the frictional forces simultaneously ...
Daijiroh YOSHIMORI, Yoshiki SUGAWARA, Masakazu TAKEDA   +2 more
doaj   +1 more source

A computational approach for thermo-elasto-plastic frictional contact based on a monolithic formulation using non-smooth nonlinear complementarity functions

Advanced Modeling and Simulation in Engineering Sciences, 2018
A new monolithic solution scheme for thermo-elasto-plasticity and thermo-elasto-plastic frictional contact with finite deformations and finite strains is presented.
Alexander Seitz, Wolfgang A. Wall, Alexander Popp   +2 more
doaj   +1 more source