The applied load, shape of the indenter and properties of substrate that have influences on microhardness test result have been studied.

This paper employs a numerical method in solving the stress field of elastic-plastic half-space under normal concentrated load of rigid indenter, and has obtained the stress-displacement curve when the indenter is Vickers or cone indenter.

The Computing Method of I-Mode Stress-Intensity Factor of Rigid Square-Ended Punch Using J-Integral;

When vertically parting pressurized gating system is adopted in a casting proess, it is usually required to calculate the actual pressure heads of ingates at different heights.

The reasons of hydraulic stepout in the boiler system were analyzed,two resolving methods were proposed,that was additional resistance balance and additional pressure head balance.

The article relates waterpower out of tune of heat supply system and the reason of it,raises two ways to solve it,that is to say,appendant resistance balance and appendant pressure head balance ,analyzes the features of appendant pressure head balance technology and the condition to use,demonstrates the advantage of comprehensive harness and the problem to use.