Fibre Metal Laminates


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On Subsurface Crack Growth in Fibre Metal Laminate Materials


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Fatigue crack growth in fibre metal laminates (FMLs) is significantly more complex than in monolithic materials due to the interaction of various physical mechanisms that govern the growth of cracks in laminates. Extensive research has gone into the development of analytical models that try to predict the growth of surface and through-cracks in the FML Glare under fatigue loading. To date, less emphasis has been placed on developing fatigue crack growth models for part through cracks. These part through cracks exhibit different rates of growth for each layer of the laminate based upon differing stress levels and delamination zone sizes. To better predict the residual strength of FML structures, understanding the behavior of subsurface crack growth is required. For this reason, data of crack growth rates for layers of various laminates were compared to an analytical fatigue crack growth model developed for surface cracks in a specific type of FML, Glare. This paper gives an initial assessment of the model's veracity for subsurface crack growth.




Composite Technologies for 2020


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Annotation Over the past three decades, the terminology of composite materials has been well acknowledged by the technical community, and composite materials have been gaining exponential acceptance in a diversity of industries, serving as competitive candidates for traditional structural and functional materials to realize current and future trends imposed on high performance structures. Striking examples of breakthroughs based on utilization of composite materials are increasingly found nowadays in transportation vehicles (aircraft, space shuttle and automobile), civil infrastructure (buildings, bridge and highway barriers), and sporting goods (F1, golf club, sailboat) etc., owing to an improved understanding of their performance characteristics and application potentials, especially innovative, cost-effective manufacturing processes. As the equivalent of ICCM in the Asian-Australasian regions, the Asian-Australasian Association for Composite Materials (AACM) has been playing a vital leading role in the field of composites science and technology since its inception in 1997 in Australia. Following the excellent reputations and traditions of previous ACCMs, ACCM-4 is held in scenic Sydney, Australia, 6-9 July 2004. The theme of ACCM-4, Composites Technologies for 2020, provides a forum to present state-of-the-art achievements and recent advances in composites sciences & technologies, and discuss and identify key and emerging issues for future pursuits. By bringing together leading experts and promising innovators from the research institutions, end-use industries and academia, ACCM-4 intends to facilitate broadband knowledge sharing and identify opportunities for long-term cooperative research and development ventures. The scope of ACCM-4 is broad. It includes, but is not limited to, the following areas: Bi- composites, Ceramic matrix composites, Durability and aging, NDE and SHM Eco-composites, Manufacturing and processing technologies, Industrial applications, Interphases and interfaces, Impact and dynamic response Matrices (polymers, ceramics, and metals), Mechanical and physical properties (fatigue, fracture, micromechanics, viscoelastic behavior, buckling and failure, etc.), Metal matrix composites, Multi-functional composites, Nano-composites, Reinforcements (textiles, strand, and mat), Smart materials and structures, Technology transfer (education, training, etc.)