We investigate the influence of raster layup on resulting material properties FDM 3D-printed materials made PLA. In particular, we toughness, strength, and stiffness, with a special focus toughness. show that for standard layups layer orientations alternating by 90°, stiffness strength are almost isotropic, while strong anisotropy is obtained Moreover, such can even switch their behavior from brittle to ductile depending loading direction. Finally, propose new stacking scheme which...

Abstract Developing accurate yet fast computational tools to simulate complex physical phenomena is a long-standing problem. Recent advances in machine learning have revolutionized the way simulations are approached, shifting from purely physics- AI-based paradigm. Although impressive achievements been reached, efficiently predicting materials and structures remains challenge. Here, we present an general framework, implemented through graph neural networks, able learn mechanical behavior of...

Abstract Manipulating the architecture of materials to achieve optimal combinations properties (inverse design) has always been dream scientists and engineers. Lattices represent an efficient way obtain lightweight yet strong materials, providing a high degree tailorability. Despite massive research done on lattice architectures, inverse design problem complex phenomena (such as structural instability) remained elusive. Via deep neural network genetic algorithm, we provide...

Abstract Protective armors are widespread in nature and often consist of periodic arrays tile‐like building blocks that articulate with each other through undulating interfaces. To investigate the mechanical consequences these wavy tessellations, especially instances where amplitude undulations is near scale constituent tiles as found seedcoats many plant species, an approach integrates parametric modeling finite element simulations direct testing on their 3D‐printed multi‐material...

Lycium barbarum commonly known as wolfberry or Goji is considered an important ingredient in Japanese, Korean, Vietnamese, and Chinese food medicine. It cultivated extensively these countries usually harvested manually, which labor-intensive tedious task. To improve the efficiency of harvesting reduce manual labor, automatic technology has been investigated by many researchers recent years. In this paper, autonomous navigation algorithm using visual cues fuzzy control proposed for Wolfberry...

Overcoming most of the limitations conventional subtractive techniques, Laser-Powder Bed Fusion (L-PBF) is a widely adopted technology that allows fabrication metallic components with complex geometries. Available machines can work large variety materials; however, multi-material printing limited to inter-layer fabrication, i.e., each layer made out single material. In this work, we aim at expanding multi-layer capabilities L-PBF intralayer manufacturing (i.e., two different materials in...

An effective approach to deal with the structural failures of transmission towers in tornadic events is develop good health monitoring (SHM) systems for them. However, strategy SHM against tornados should be different from conventional atmospheric boundary layer (ABL) winds oriented ones, as non-stationary nature significantly differentiates them ABL winds. To satisfy need obtaining highly time-varying whole-field stress on structure course event SHM, an innovative transient load...

Shapes and topologies of lattice materials have been extensively studied, yet very few studies dealt with shapes inspired by ancient mathematicians, such as the Platonic solids discovered Plato in 360 BC or mathematical behavior unexplored "semi-regular" Pacioli (1445–1517). Using finite element analysis method, buckling post-buckling Paciolian cells subjected to a compressive load were analyzed. In these solids, energy absorbed per unit mass is an increasing function number faces, similar...

Additive manufacturing technologies are commonly adopted for the fabrication of trabecular-based orthopedic prostheses made titanium alloys due to their ability in producing complex and intricate designs. In this scenario, use finite element models represents a powerful tool designing such devices assessing biomechanical behavior. Nevertheless, usefulness numerical approach depends on reliability models, crucial aspect when dealing with trabecular structures present within implants. Indeed,...

Abstract Evaporation‐induced self‐assembly of colloidal particles is one the most versatile fabrication routes to obtain large‐area crystals; however, formation uncontrolled “drying cracks” due gradual solvent evaporation represents a significant challenge this process. While several methods are reported minimize crack during evaporation‐induced assembly, here an approach take advantage as patterning tool fabricate microscopic photonic structures with controlled sizes and geometries. This...

Abstract Instability-induced pattern transformations of the architectured multi-phase soft metamaterial under bi-axial compression were explored. The is composed two phases: a matrix and reinforcing hexagonal network embedded in matrix. Equi-biaxial loading found to induce both micro- macro- instabilities networked architecture. Two types instability patterns observed, dependent upon architecture geometry material combination. critical strain for triggering resulting was derived, theoretical...

As one of the additive manufacturing (AM) methods, fused deposition modeling (FDM) technology is widely adopted but involves some limitations in lacking surface quality and mechanical properties due to use only planar layers. This review will explore novel FDM approach, curved layer (CLFDM) where a nonplanar slicing technique introduced improve on these shortcomings. Recently, this has gained more traction industry among consumers owing not its great potential overcome several conventional...

Exploiting small scale material effects and structural topology, nano-architected lattices represent a recent novel class of mechanical metamaterials, which exhibit unprecedented combination properties. Together with scarce resistance to fracture catastrophic failure, understanding the characteristics properties 3D still represents limiting factor for design realization future engineering applications. Here, using in-situ tensile experiments finite element simulations, we first show...

Abstract The main aim of the current study is to evaluate compressive quasi‐static and fatigue properties titanium alloy (Ti6Al4V) cellular materials, with different topologies, manufactured via laser powder bed fusion (LPBF) process. topologies herein considered are lattice‐based regular irregular configurations cubic, star, cross‐shaped unit cell along trabecular‐based topology. results have indicated that effective stiffness all in range 0.3–20 GPa, which desirable for implant...

An experimental and numerical investigation of the cylindrical carbon fiber reinforced polymer (CFRP) structures under various loads including tension/torsion loading conditions has been conducted. Various boundary parameters were taken into account to check impact shear component obtain result. The nonlinear model proposed by Chang implemented take softening effect stress-strain curve caused damage accumulation. computational thin-walled tubes contains geometrical architecture material,...