Author(s): Raymond M. Kolonay  

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The meeting brought together over 85 participants from 15 countries and was divided into three primary sessions: novel materials, novel design methods, and novel manufacturing techniques for military vehicles. Each session had a keynote presentation, followed by the exposition of several technical papers, in turn followed by a panel discussion. The keynote presentations and papers provided a good mix of industry research (at a higher technology readiness level/manufacturing readiness level [TRL/MRL]) and academic research (at a lower TRL/MRL). The design methods discussed ranged from the component level to full system level, while much of the materials discussion was focused on moderate to high temperature materials, along with meta-materials. The manufacturing session focused on additive manufacturing and automated composite lay-ups. To advance the development of novel materials and manufacturing techniques, particularly for extreme environments, it is essential to foster tight collaboration between materials scientists, design engineers, and manufacturing experts.

Author(s): Mario De Stefano Fumo; Diletta Sciti; Luca Zoli; Lorenzo Cavalli; Alessandro Airoldi  

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This report gives an overview of material research for high temperature applications focused on hypersonic systems. It covers manufacturing routes, modelling and relevant environmental testing of advanced high temperature materials as CMC and UHTCMC beyond coupon level.

Author(s): Richard Beblo  

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Although much work remains in validating the framework and extending it to include more physics, multiple materials, more complex design domains, and accommodating more design variables, the above work shows promise in the method as a viable solution to incorporating material design into topology optimization. Principal component analysis has been shown to have the capability of incorporating variation of up to 50 different design variables at relatively low order. The method of using RBFs to model the boundaries of the material design space appears adequate given appropriate smoothing of the functions during fitting. Using homogenized material properties, executing the macroscale optimization yields a relatively computationally efficient process. Using sensitivity weighted nearest neighbor for realizable material selection has minimal detrimental impact on optimality.

Author(s): David King; Itsaso Echeverria; Virtudes Rubio; Luke Martin; Michael Petty; Gregory Traviss  

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The research demonstrated AFP of oxide-based ceramic matrix composites (CMCs), utilising a new aluminium oxide fibre/aluminium oxide matrix slit-tape material format supplied by Axiom Materials containing Nextel 610 fibres within a proprietary aluminium oxide-based matrix. This work produced a cone shaped demonstrator from the materials using AFP, whilst showing a significant reduction in material waste.

Author(s): Emiel Amsterdam; Ali Chabok  

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Multi-disciplinary design optimization and novel manufacturing technologies like additive manufacturing have provided designers with tools to create highly optimized structures as well as the ability to fabricate them. The introduction of ICME and hierarchical bioinspired architected materials require relationships between the microstructure and mesostructure of materials and the performance of materials in terms of failure mechanisms (e.g., fatigue).

Activity Type: Specialists' Meeting
Reference: AVT-384
Date:

Novel Materials and Manufacturing in Military Vehicle Design