The research progeny about corrosion character and deterioration mechanism of mechanical property of the corroded steel bars in concrete are mainly summarized and discussed in this article,which also expounds the deteriorating regularity of nominal strength and ductility of the corroded steel bars .

The result of the experiment indicated that the strength limit and elastic modulus of the material can increase after annealing treatment within the temperature range, but at the same time, the material became crisp and its plasticity declined remarkably.

Using thermal strength experiment to test and determine the pivotal parameters such as ultimate strength and thermal stress at the complicated condition of transient heating is very important for reliability estimation,life prediction of aerospace materials and security design of high-speed flight vehicle.

Investigation on the ultimate strength of unidirectional tapes and plain cloth hybrid laminates;

Analysis of ultimate strength and sensitivity for oil tankers based on IACS common rules;

Research development of ultimate strength of hull structure;

Both the tensile ultimate stresses and the relations between them are examined.

In this paper,a two dimension variation method is applied to compute tensile fracture surface fractal dimensions of a grain composite material LDPE/CaCO 3,and set the relationship of tensile fracture surface fractal dimensions and tensile ultimate stress and material filler weight content percent.