This work describes the high-velocity impact behavior of doubly curved sandwich panels. The panels are manufactured using carbon/fiber epoxy composite face sheets, polyurethane foam core and 3D-printed PLA plastic cellular auxetic (re-entrant) honeycombs. High-velocity tests carried out by a single-stage air gas gun test machine. A spherical steel projectile with radius 5 mm is impacted to cent...

There is a vast literature showing the connection between deformed relativistic kinematics and curved momentum space, and, in particular, how former can be obtained from geometrical properties of latter. However, there not any mention about geometry multi-particle system making manifest possible modification metric one particle due to presence others. In this work we explore depending on partic...

The geometrical variability in the joints of large-scale, doubly-curved space-frame structures can have a substantial impact on time and cost their construction. This paper proposes novel framework to assess construction complexity as factor fabrication joints, promote informed design process. k-means algorithm was used cluster into batches, providing an overview distribution. A initialisation ...

This paper presents a numerical investigation on the plastic forming of doubly curved surfaces aluminum foam sandwich panel (AFSP). A mesoscopic 3D Voronoi model that can describe structure closed-cell relatively realistically was established, and series simulations using with core were conducted two typical including spherical saddle-shaped AFSPs to analyze deformation behaviors defects in det...

A new experimental technique is proposed to measure the pressure gradient in corner laminates with aim of guiding manufacturing practices that can produce composites desired thickness. mapping sensor was placed between a metal mould tool and silicone sheet acts as an idealised composite part. The compaction loss internal corners rise external reported for first time, covering part thickness rad...

In the framework of refined theory, which takes into account transverse shear deformation, solution problem on steady state vibrations orthotropic doubly curved panel with arbitrary number massive absolutely rigid inclusions configuration that penetrate through all its thickness taking harmonic in time distributed external load surface is constructed. Inclusions have different types connections...

This paper reports an efficient ‘Finite Element analysis (FEA)’ simulation model to study the line heating process for simulating the manufacturing process of doubly curved structures. The simulation model is implemented with commercially available software (Ansys *TM Mechanical APDL) and the source of thermal energy is assumed to be a ‘Gaussian’ distributed heat flux.The temperature dependent ...