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Significant Achievements

Designing new ferromagnetic double perovskites: the coexistence of polar distortion and half-metallicity

In our latest work published in PCCP, we use density functional theory to design new double perovskites and investigate their structural, electronic, and magnetic properties. Structural calculations based on the total energies show the optimized monoclinic and orthorhombic crystal structures for Ca2MnVO6 (CMVO) and Ba2MVO6 (BMVO) compounds. Our spin-polarized calculations predict the half-metallic ferromagnetic ground state for CMVO and BMVO. Our findings introduce CMVO and BMVO double perovskites as promising candidates for designing ferromagnetic polar half-metals and spintronic applications. 

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A Conformal Optimized 3D Printed Kneepad with Deformation Sensing 

Additive manufactured smart wearables are establishing an increasingly firm foothold within monitoring of physical activities. A tiler was the use case proposed by this study seeking to monitor changes in a tiler’s kneeling work position with the goal of tracking behaviour and alleviating long-term damage due to incorrect posture. This paper published in IEEE Access describes the development process of a conformal kneepad with embedded sensing, obtained by means of interposing flexible tactile sensors between 3D printed elastomeric layers. Topology optimization is employed towards material reduction in the context of tailoring the kneepad design for the differentiated loading which the case study imposes.

Considerations on the inherent challenges of over molding flexible geometries are provided along with a design-to-fabrication process description which visits 3D printing, post-processing and 3D scanning. The use of the latter enables the creation of a fully conformal design, optimized for the perfect fit on the person wearing the kneepad. The topology optimization is validated numerically and the ability of the kneepad to react to different pressure stimuli is tested with a robot arm, capable of simulating different contact angles and load cases. By means of dedicated electronics, the sensed information is module streamed over Wi-Fi and tactile images are formed on a user-friendly terminal. The kneepad concept ultimately serves as a case study for extended additive manufactured smart wearables, with potential to be extended towards autonomous feedback and posture correction systems.

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SDU Mechatronics University of Southern Denmark

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Last Updated 09.11.2021