Based on material damage, a number of techniques and methods for the life assessment have been developed over past several decades.

In order to establish the corresponding fracture theory, develop a proper life assessment approach and then control the structure failure, many studies were carried out on this type of failure mechanism in the past years.

The main failure modes,mechanisms of spaceborne stirling cryocooler,and the lifetime evaluation research and development in China and abroad were introduced.

Novel nondestructive technology of life evaluation for austenitic tubes of boiler and its application;

It has important theoretical significance and engineering value to build the life evaluation system for fully mechanized mining equipment,carrying on scientific and reasonable evaluation for equipment life,to improve equipment management theory,and to guide the manufacturers to carry on scientific management for equipment.