A double-layer cylinder of shrink and autofrettage is used and the computed formula of elastic strength is derivated.

This paper performs the stress analysis of autofrettaged hydraulic coupling outer sleeve for ideal elastic-plastic materials, deduces the formula of residual stress with autofrettaged stress uninstalled, and gets relation between Bauschinger effect and the best diameter rate of no-producing reversed yield for ideal elastic-plastic materials.

A method of defining the autofrettage of a thick-walled cylindrical tube is given from the viewpoint of shakedown.

This paper discusses the effect of the species and property of pulp, the moisture content of paper and relative humidity,adding filler,the density of paper and pressing and drying on the hygroexpansive strain of paper.

And the influence of the paper density on the thermal conductivity of aluminosilicate fiber paper was investigated.

The sheets with different density are made by birch sulfate unbleached pulp.

Analysis of tightness in the design of wool fabrics;

Calculation of fabric tightness by linear regress;

Influences of Yarn Twist & Fabric Tightness on Fabric Stiffness;

This piece analysis the condition and foundation of automatic tension of belt drive system.

This piece analysis the condition and foundation of automatic tension ofbelt drive systen In addtion, advance the design mehtod of automatic tension devicewhich can improve the belt s life under the floating status of loading shaft.

Based on the detail study on the working principles of the long distance downward driving belt conveyor,the paper discussed the dynamic automatic tension in the starting and normal operation as well as the braking process and also analyzed the working principle and installation application of the automatic tension device for the hydraulic winch.