Abstract
This paper proposes a design of novel composite materials inspired by the Peano curve and manufactured using PolyJet 3D printing technology with Agilus30 (flexible phase) and VeroMagentaV (rigid phase) materials. Mechanical properties were evaluated through tensile and compression tests. The general rule of mixture (ROM) for composites was employed to approximate the tensile properties of the hybrid materials and compare them to the experimental results. The effect of reinforcement alignments and different hierarchies are discussed. The results indicated that the 5% inclusion of the Peano reinforcement in tensile samples contributed to the improvement in the elastic modulus by up to 6 MPa, but provided no obvious enhancement in ultimate tensile strength. Additionally, compressive strengths between 2 MPa and 6 MPa were observed for compression cubes with first-order reinforcement, while lower values around 2 MPa were found for samples with second-order reinforcement. That is to say, the first-order reinforcement has been demonstrated more effectively than the second-order reinforcement, given the same reinforcement volume fraction of 10% in compression cubes. Different second-order designs exhibited slightly different mechanical properties based on the ratio of reinforcement parallel to the loading direction.
Highlights
Fractal patterns exist everywhere in nature in various ways, such as in spider webs, the Milky Way galaxy, and coastlines
The concept of fractal was first introduced by Mandelbrot [1] in 1977. He defines it in the book Fractals in Physics as [2]: ‘Fractal is a structure comprised of parts that, in some manner, are similar to the whole of this structure.’ (p. 250)
Ec,min thefrom lowerthe bound of the elastic of the composite
Summary
Fractal patterns exist everywhere in nature in various ways, such as in spider webs, the Milky Way galaxy, and coastlines. The self-similarity characteristic of fractal patterns contributes to a multiband feature of the corresponding antennas [5,6,7,8], while the high convoluted shape and space-filling properties of certain fractal curves allow for the reduction of the miniaturization of microstrip antennas, resonators, and filters [9,10,11,12]. These properties show great potential for designing multiband antennas, frequency-selective surfaces, and reducing the size of antennas. Recent studies regarding multi-material 3D printing have demonstrated its superior function in creating structures/materials with tunable mechanical properties [55].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
