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Department of Aeronautical Structural Engineering
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Department of Aeronautical Structural Engineering was founded in 2003. It was formerly known as 504 Teaching and Research Section of the Aircraft Engineering Department (which was founded in 1959) and Aircraft Structural Strength Research Institute of the Northwestern Polytechnical University (founded in 1981). The department consists of the two national key laboratories: the State Specialized Laboratory of Dynamics and Strength, and the National Defense Key Discipline Laboratory of Aircraft Structural Mechanics and Strength Technology. It is also the fundamental part of the state key discipline of Solid Mechanics in NPU.

The department is involved with the undergraduate education of two specialties: Aircraft Design and Engineering and Theoretical and Applied Mechanics. The major discipline for M.S. and Ph.D. degree programs is the Solid Mechanics. The department also accepts post-doctoral researchers each year. Research areas of the department focus on the structural fatigue, fracture and reliability, multi-scale mechanics, aeroelasticity, structural vibration control, impact dynamics, strength of composite materials, and computational mechanics.

The department consists of four research institutes and has 38 faculty members, including 19 professors, 8 associated professors and senior engineers, and 9 lectures. The department has a total enrolment of over 120 postgraduate students. 

Main research fields

Fatigue, fracture and reliability for structures

Structural dynamics and vibration control

Impact dynamics and dynamical fracture analysis

Mechanical behavior of composite materials

Numerical methods and algorithms in solid mechanics

Experimental techniques for the mechanical properties of MEMS materials

Famous professors

 

 

Professor Chen Yijian

Professor Yu Qifeng

 

 

 

Professor Yang Zhichun

Professor Li Yulong

 

 

 

Professor Li Yazhi

Professor Xu Fei

 

 

 

Professor He Erming

Professor Guo Weiguo

Main research results

1.    Institute of Advanced Structures & Materials (IASM)

Advances of dynamic experimental techniques

Dynamic behaviors of aircraft materials and structures

Anti-bird and crashworthiness design of aircraft structures

 

 

 

Split Hopkinson Pressure Bar

Tensile bar

Desktop Hopkinson Bar

 

 

 

 

Bird-impact test system

Simulating impact test of engine fan debris on the fuel tank cap

Simulating bird-impact test on the leading edge of wing

 

 

 

Equal Channel Angular Pressing die setup

ECAP on Mg alloy at different temperatures

 

 

 

TEM on Ultrafine grained Al alloy

The sub-grain structure after ECAP

 

Stress-strain curves of ultrafine grained Mg alloy at different temperature and strain rate

 

Low- and high-densification of 2D-C/SiC

 

 

 

SEM on the fracture surface of C/C composite

Stress-strain curves of C/SiC composite at different strain rates

 

Shear fracture of Metallic Glass(a), the shear band propagating behavior in glassy ribbon(b) and the shear crack propagation in double-notched metallic glass specimen(c)

 

Study on the tensile behavior of Electron Beam Welded TC4 Joints

 

Anti-bird design of multiple structures on C919

 

Bird impact on the tail leading edge of ARJ21

 

2.  Institute of Structural Dynamics and Control

Nonlinear Aeroelastic Beheaviors of Flat Panel and Curved Panel in supersonic flow

 

 

Nonlinear Mechanical Behaviors of Inflatable Structures and Applications

 

 

 

 

Structural Dynamics under Multi-field Coupling Loads

 

 

Structural Dynamic Optimization

 

Inner shapes of a trapezoid plate model before (dashed line) and after optimization (solid line)

 

Initial configuration design of a simply supported bridge

 

Optimal shape design of the bridge with a frequency constraint ω1 ≥ 30 Hz

 

Optimal shape design of the bridge with two frequency constraints ω1 ≥ 30 Hz and ω2 ≥ 60 Hz

3.  The Institute of Aeronautical Structural Integrity

Computational study of fundamental solid mechanics issues relevant to structural integrity

 

 

 

Global mesh

Local mesh

The S-version FEM for Integral Beam

 

 

 

 

 

The development of experimental techniques for durability/damage tolerance substantiation

 

The aircraft structural durability/damage tolerance design and analysis technique for new material types and new concept structures

 

 

 

 

 

 

4.  The Institute for Computational Mechanics and Its Applications

 

S-version FEM for multiple crack

 

unit-cell of C/SiC with FEM

 

Cohesive zone simulation with FEM

Fig.1: An example of finite element method

Mesh-free (SPH) method on impact dynamics simulation

 

The application of SPH method on hydroplaning and water-spray characteries of aircraft tyres

 

 

Water impact of Space Capsule

The application of SPH method on hyper-velocity impact response

Fig2   An example of meshless methods

 

Large-scale fast calculating and assessment methods on vibration noise of aircraft structure

Fig 3: An example of boundary element method

 

Fig.4: Saddle-point configurations involving the nucleation process of two different partial dislocations in Cu

 

 

 

 

Screw dislocation

Dislocation migration

Twinning

Fracture of grain boundary

Molecular dynamic results on nano-crystal Tantalum


 
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