Multilinear Fourier multipliers of a locally compact group

In his paper "Group C*-algebras without the completely bounded approximation property", Haagerup proves several important results about the weak amenability of locally compact groups. Among these, is the result that a lattice in a second-countable, unimodular, locally compact group is weakly amenable if and only if the surrounding group itself...

Experimental Investigation and Lattice Modelling of 3D Printed Concrete Buildability quantification and early-age creep behaviour

For some decades now, additive manufacturing has been a revolutionary technology which generates enormous interest in both industrial and academic applications. 3D concrete printing (3DCP), an automated construction method, is able to manufacture the computer-designed model through material deposition. This innovative technique can considerably...

Modularity in Lattice structures for Circular Product Design

The principles of repair and maintenance, reuse, and repurposing of products in a circular economy aim at further minimizing the environmental impact during the use of products before being processed for recycling. However, studies on lattice structures in various fields focus on mechanical characteristics, design, and manufacturing methods....

The effect of nodal topology on cellular solid mechanics: A preliminary diagnostic experimental investigation

Additive manufacturing allows material structuring, supporting the fabrication of multiple-level structures or metamaterials. Through the lens of classical stress reduction, nature’s cellular solid structures feature stress-homogenizing nodal topologies. Avian long bones are an example. Research into the mechanics of open cell cellular solids...

A lattice model for prediction of ice failure in interaction with sloping structures

To study interaction between ice and sloping structures, numerical models are required that can predict failure of the ice based on physical ice properties, deformations and structural shape and size. An important element of these models is the set of failure criteria that is applied, as failure limits the loading of the ice on the structure....

Energy Absorption of Additively Manufactured Lattices: On biomimetic abstraction of structural principles toward increased energy absorption in lattice structures

Cellular solids are characteristically excellent energy absorbers due to their capacity to store large amounts of energy through compression. A bioinspired design approach identified the Pomelo fruit (Citrus Maximus) as a biological role model for energy absorption. Fruit peels’ biologically most important functions lies in the need to provide...

Development of an in-panel attachment method for fiber-placed composite lattice and grid-stiffened structures

Composite grid-stiffened and lattice structures have been the focus of an increasing amount of research over the past decades, mainly because of their excellent structural performance. Most of the previous and current research focuses on analysis, manufacturing, and optimization of the base structure. Although more and more is becoming known...