Organizer：State Key Laboratory of Explosion Science and Technology

                    Collaborative Innovation Center of Safety and Protection

Title：         Introduction of Impact Engineering Laboratory

Reporter：  Prof. Guoxing Lu,  Swinburne University of Technology

Title：         Topological optimization for structures and materials

Reporter：  Prof. Xiaodong Huang,  Swinburne University of Technology

Title：         Crashworthiness and energy absorption of tubular structures

Reporter：  A/Prof. Dong Ruan,  Swinburne University of Technology                  

Time：        10:10a.m., May 18, 2017

Venue：      Building 3, Room146, Beijing Institute of Technology

Topological optimization for structures and materials

Abstract:

The multidisciplinary structural optimization has been attracted the wide attention by researchers from mechanical engineering, civil engineering, material science and physics. In this presentation, I will briefly introduce topology optimization, the BESO method and its application in optimal design of mechanical and civil structures. Then I will discuss on the design of microstructures of functional materials and concurrent design of materials and structures. In particularly, I will present the most recent development of the BESO method in designing photonic crystals and phononic crystals for band gaps and all-angle negative refraction.

Crashworthiness and energy absorption of tubular structures

Abstract：

Dr. Ruan’s presentation is about the crashworthiness and energy absorption of tubular structures. Square carbon fibre composite (CFRP) tubes were wrapped externally with aluminium sheets and crushed quasi-statically in the axial direction to investigate the effect of aluminium sheet-wrapping on energy absorption. Moreover, a specially designed and manufactured platen with cutting blades was employed, as a new energy dissipating mechanism, to simultaneously cut and crush both CFRP tubes and aluminium sheet-wrapped CFRP tubes. Notches were introduced at one end of some tubes which were crushed by a platen with blades to control the location of failure. Experimental results showed that the deformation mode of CFRP tubes and aluminium sheet-wrapped CFRP tubes that were crushed by a flat platen or by a platen with blades was a combination of splaying progressive and transverse shearing failure mode. By wrapping CFRP tubes with aluminium sheets, the mean crushing force and energy absorption increased by up to 70%. However, the specific energy absorption decreased. Tubes with notches crushed by a platen with blades had a lower initial peak force, higher mean crushing force, larger energy absorption and larger specific energy absorption in comparison with counterpart tubes crushed by flat platens.