You are here: Civil Engineering / Our people / Postgraduate students

Sagar Das

Sagar Das photo

BSc (RUET, Bangladesh), MSc (UKM, Malaysia)
Postgraduate Research Student



School of Civil Engineering, Room 101
Phone: +61 2 9351 2145
Fax: +61 2 9351 3343
Email:

Research project - Characterization of mechanical properties of brittle materials at high strain rates using Hopkinson bar facility

Supervisor: Dr Luming Shen
Associate Supervisor: Dr Giang Nguyen


Brittle materials like concrete, glass, rock often experience high strain rate loading associated with high velocity impact. The mechanical characteristics of those brittle materials under this condition should be known to design engineering structures in protecting from such dynamic load. This dynamic characteristic is also useful in mining engineering where fracture of rock through high velocity impact is necessary to reach for resources. This project aims to characterize the mechanical properties of brittle materials at high strain rate loading and to develop a fracture model at such dynamic condition.

Split Hopkinson pressure bar (SHPB) is a well-established experimental method to characterize the material properties at high strain rate. Once the model is developed based on numerical study, it will undergo experimental validation through SHPB testing. Thus, this knowledge would be beneficial to construction and mining industry to better understand brittle material behaviour in high strain impact loading.

Publications

  • D. Sagar, R. Hamid and A.R. Khalim (2012) Algorithm for automatic data interpretation software for concrete slab in impact echo assessment. Materials and Structures. Volume 45, Issue 5, pp 727-746.
  • A.R. Khalim, D. Sagar, Md. Kumruzzaman, A.S.M.Z. Hasan (2011) Combination of Nondestructive Evaluations for Reliable Assessment of Bridge Deck. Architecture and Civil Engineering Vol. 9, No 1, pp. 11 – 22.
  • Sagar Das, Khalim, A.R. & Hamid, R. (2009). Development of Algorithm for Automatic Defect Identification of Plate Structures in Impact Echo Assessment. Proceedings of the 2nd WSEAS International Conference on Engineering Mechanics, Structures and Engineering Geology, Greece: 186-191.
  • Das, S., Khalim, A.R. & Hamid, R. (2009). The Size Effect of Delamination in Plate Structure by Impact Echo Evaluation. Proceedings of the Engineering Postgraduate Conference. October 20-21, Palm Garden Hotel, Putrajaya, Malaysia.