As the project leader and main undertaker, he has completed tens of millions of dollars of research by government agencies such as NASA and the Department of Defense, as well as internationally renowned companies (including Boeing, EADS/Airbus, Bombardier, and Lockheed Martin). Fund, has achieved a number of internationally leading creative research results in basic theoretical research and applied technology research on aerospace structural health monitoring. The research results have been reported in NASA technical briefings four times and published papers by NASA and the Department of Defense. He has written more than 100 research reports and applied for 18 U.S. invention patents, 8 of which have been authorized. Since October 2010, he has been responsible for basic and forward-looking research on civil aircraft structural health monitoring and management technology and intelligent materials and structural technology at COMAC Beijing Research Center. Some of the research results are as follows:
Developed the concept of sensor network intelligent layer, proposed the concepts of multi-line intelligent layer, three-dimensional intelligent layer and electromagnetic shielding intelligent layer for the first time, invented the production of various sensor network intelligent layers Technology;
For the first time, a hybrid piezoelectric sensing/fiber-fiber sensing active structural health monitoring system was proposed, and a theoretical method for active structural health monitoring using piezoelectric sensor originals as drivers and fiber gratings as sensors was established;
Proposed for the first time a structural health monitoring and management system for rocket engines with autonomous and automated diagnostic functions based on distributed sensor networks;
Proposed a low-cost and highly reliable autonomous structure for the first time Health monitoring system to evaluate the integrity of the composite fan containment casing;
For the first time, the concept of a distributed multi-functional sensor network was proposed and established to achieve multi-mode sensing and detection capabilities of composite structures;
As the project leader, he led the research team to take the lead in conducting basic research on the application of structural health monitoring in aerospace engineering in the world, and solved a number of key technologies to ensure the successful application of structural health monitoring technology in the aerospace field;
Revealed the damage and failure mechanism of composite bolted connection structures, and developed a damage analysis technology for composite bolted connection structures that combines damage progression analysis and finite element stress analysis;
Invention A pedestrian impact protection system based on an intelligent layer is developed, so that when a car hits a pedestrian, it can automatically provide pedestrian protection to reduce pedestrian injuries;
Developed a method to describe the mechanical behavior of metal materials under thermodynamic loads. Unified constitutive model, as well as a constitutive model for predicting the fatigue life of metal materials;
Proposed the moiré interference fringe multiplication method for the first time, and developed research on the production technology of high-sensitivity, high-temperature holographic moiré gratings;
p>
The high-sensitivity moiré interference method was applied to the micromechanical study of new materials such as toughened structural ceramics and shape memory alloys, and phenomena such as localization of phase change plasticity were discovered.