Keynote Lectures Damage and fracture in deformation of materials and deformationbased manufacturing M. W. Fu∗ Department of Mechanical Engineering, Research Institute for Advanced Manufacturing, The Hong Kong Polytechnic University, Hong Kong, China ∗ mmmwfu@polyu.edu.hk Keywords: Void initiation and growth, damage and fracture, damage criteria and prediction. Deformation of materials and deformation-based manufacturing, viz., materials forming, are respectively the most practical engineering activity and the efficient manufacturing process, while the latter is widely employed to fabricate net-shape or near-net-shape parts via plastic deformation of materials. From manufacturing aspect, this traditional manufacturing process of metal forming has been being revitalized as many attractive advantages and uniqueness such as high productivity, superior mechanical properties, excellent material utilization, low production cost, and being able to fabricate the complex geometries and features of deformed parts, etc., cannot be replaced by other manufacturing processes. In this process, the design of deformed parts, forming process and tooling, defect prediction and avoidance, and product quality assurance and control are becoming more and more critical. All of these activities need to consider the damage and fracture in the deformation process of materials. Therefore, a scientific insight into the formation and occurrence of damage and fracture and an in-depth understanding of their mechanism and behaviors are crucial. In this talk, the mechanisms of the initiation, coalesce, growth of voids in the plastic deformation of materials, the formation and occurrence of damage and fracture, and their mechanisms, behaviors, and prediction and avoidance via experiment and simulation will be presented. The talk will thus give an overview of the state-of-the-art in damage and fracture research. 8
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