Introduction
In order to promote effective use of new steel materials and products in engineering construction, the CNERC Laboratory of Mechanics and Steel Materials is established to:
- conduct fundamental studies into mechanical properties of new generations of steel materials;
- develop welding technologies for the new generations of steel materials;
- provide design guidance on the structural requirements on the new generations of steel materials, and the corresponding welding specifications.
The investigations aim to:
- To quantify the basic mechanical properties and the constitutive laws of high strength steels;
- To quantify deformation characteristics of welded joints with various types of heat affected zones (HAZ) under various heat input energy;
- To investigate the continuous cooling transformation properties of the high strength steels;
- To establish the damage evolution properties of the high strength steels and the corresponding HAZs;
- To establish practical Welding Procedure Specifications for the high strength steels.
- To investigate the hysteretic behaviour of the high strength steels and the corresponding HAZs.
Research Team of the Lab
- Laboratory-in-charge
- Dr. H C Ho
- Deputy Laboratory-in-charge
- Dr. Y F Hu, Research Assistant Professor
- Members
- Prof. K F Chung
- Prof. M X Huang (Professor, The University of Hong Kong)
- Prof. G H Feng (Professor, Central Iron & Steel Research Institute)
- Dr. Zhenbao Jiao (Assistant Professor, Dept. of ME, PolyU)
- Ir Victor Wu
- Ms. T Y Xiao
- Mr. Y C Wang
- Mr. H Jin
Lab details
The LMSM takes the following forms of investigations:
Task I Experimental investigations
- Physical welding simulation to produce various types of HAZs;
- Tensile tests on heat treated coupons;
- Tensile tests on butt-welded and fillet-welded joints;
- Charpy impact tests on heat treated coupons and welded joints;
- Cyclic tests on butt-welded joints.
Task II Numerical investigations
- Numerical welding simulation using coupled heat-transfer and advanced thermo-mechanical analyses;
- Mechanical simulations on heat treated coupons under monotonic tension;
- Mechanical simulations on welded joints under monotonic and cyclic actions;
- Establishment of constitutive models for typical welded sections.
Expected deliverables:
The deliverables of this project will not only include welding procedure specifications, design guidelines and recommendations, but also high-quality papers, and technical reports. This project can greatly facilitate the wide adoption of high strength steels in building construction. The following major technical output is expected:
- Constitutive models for high strength steels under both monotonic and cyclic actions;
- Welding procedure specifications for high strength welded joints using different welding methods;
- Design guide on welding of high strength steels.
