Mathematical expression of calibration curves for measuring friction factor by ring upsetting;

Rigid plastic finite element method was applied to simulate the upsetting process of high billet between two plain dies and , the methods to exert a small transverse disturbing force was discussed, and then the influence of friction factor upon the stability of high billet was also given.

Study of finite-element simulation of influence of friction factor on expandable casing;

Calculation of friction factor for the turbulent flow in straight and circular pipe;

Calculation Method for Friction Factor of Pipe;

Prediction model for friction coefficient of resin-based friction materials based on neural network;

Discussion of influence factors on viscose/pupa protein filament′s friction coefficient;

Friction and friction coefficient for aluminium alloy extrusion;

The experimental results indicate that the frictional coefficient of PCrMo steel is decreased as the slide-speed is increased,and it is increased as the contact pressure is increased.

Its prospect is revealed through the comparative tests on the physical properties and the processibility of SSBR,ESBR and BR,the frictional coefficient of their compounds and the tread life of their tires.

The problem is that it is hard to confirm the frictional coefficient b.

By the use of metal belt typed step-less variator manufactured with self-contained design,an experimental research was carried out on the frictional factor and transmission efficiency of metal belt transmission.

Frictional factors of three sets of dies made of different materials as well as four samples of dif-ferent ma terials are measured with the designed equipment under two different conditions of dry friction and with special stamp ing cleaning and rust-proof oil respectively.

An oscillatoutype tribometer developed byourselves was used to determine the frictional factor and to differentiate the lubricating mode forthree kinds of bio-compatible polymer(i.