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Article
Materials Science, Multidisciplinary
Amin Farrokhabadi et al.
Summary: This paper experimentally examines the energy absorption capacity of continuous fiber-reinforced thermoplastic auxetic structures and compares the results with numerical and analytical methods. The study finds that using foam significantly increases the absorbed energy. Additionally, a theoretical formulation is developed and probabilistic analysis is performed to design honeycomb failures for various configurations.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Xinxin Wang et al.
Summary: This study experimentally investigates the mechanical behaviors of 3D-printed polymeric TPMS sheets. The results show that the P-W Hybrid structure exhibits good energy absorption and load bearing capacity, while the Schoen I-WP structure experiences a good collapse pattern. The structures are ranked in a comprehensive manner, with P-W Hybrid being the best.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Zhixin Huang et al.
Summary: This paper proposes a novel dual architecture phase lattice (DPL) structure and investigates its mechanical properties and deformation features under compression. The DPLs with different arrangements are constructed using additive manufacturing. The results show that the deformation and failure initiate in the matrix phase and trigger the embedding of the reinforcing phase into the crushed regions. Increasing the rod diameter and introducing appropriate agreements of reinforcement phases are effective approaches for enhancing the compressive strength and specific energy absorption of DPLs.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Albert Forés-Garriga et al.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Hussain Gharehbaghi et al.
Summary: The present study aims to assess a new lattice structure with high energy absorption capacity. Lattice structures with surface-based unit cell have higher energy absorption than those with strut-based unit cell. A new lattice structure is presented by adding the strut to the surface-based unit cell which has a higher energy absorption capacity than the lattice structures with surface-based unit cell. First, the high energy absorption capacity of surface-based lattice structures was evaluated by adding the strut. Such analyzes are conducted by providing a numerical model which considers the elasto-plasto-damage properties of materials under tension and compression. Then, a number of experimental samples were made using additive manufacturing and the compression test was performed. The results of finite element analysis were consistent with those of the experimental results. Based on the results, adding strut increased the energy absorption for surface-based lattice structures by about 106%. Finally, the effect of the ratio of geometric parameters of the unit cell on its mechanical behavior was evaluated.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Bingbing Fan et al.
Summary: This study proposes a novel two-phase hybrid strategy for designing lightweight lattice structures with improved mechanical properties and energy absorption characteristics. By changing the types, numbers, and arrangements of cells, the hybrid structures achieve higher specific energy absorption than traditional lattices and other metamaterials. The findings provide a new structural design strategy for fabricating lattice architectures using additive manufacturing.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Manufacturing
Satoshi Okubo et al.
Summary: Irregular lattice structures, designed using a three-dimensional Voronoi partitioning method, were investigated for their compressive properties and energy absorption capabilities. The results showed that irregularity control, quantitatively defined by the coefficient of variation (CV) for cell volume distribution, significantly improved the isotropy of energy absorption. Structures with CV above 0.1 were almost isotropic, while structures with CV below 0.35 showed the highest average energy absorption.
ADDITIVE MANUFACTURING
(2023)
Article
Mechanics
Fatemeh Ghorbani et al.
Summary: This study developed an analytical model using the energy method and Castigliano's second theory to evaluate the equivalent mechanical properties of a bone-inspired cellular structure made of glass fiber-reinforced Polylactic Acid (PLA) composite material. The structure was fabricated using 3D printing and subjected to compression testing. Digital image correlation technique was used to obtain strain and displacement data, and a finite element numerical model was also developed. The results showed that the proposed analytical model accurately determined the mechanical properties of the composite bio-inspired cellular structure, and reinforcing the structure with continuous fiber significantly improved the mechanical properties. A comprehensive parametric study was performed to investigate the effect of geometric parameters.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Zhenyu Wang et al.
Summary: By using 3D printing technique, we have developed a composite lattice structure with high toughness and strength. Strengthening and toughening zones are assembled into a layered structure. The resulting composite lattices exhibit significantly improved flexural properties and crack resistance properties, showing 400%, 83%, and 36% higher toughness, specific strength, and fracture toughness compared to solid materials, respectively. The exceptional strength and toughness of the composite lattices come from the synergetic effect of the strengthening and toughening zones, as confirmed by both experimental and theoretical analysis. These findings provide an effective strategy for fabricating epoxy-based composites with precisely controlled structures and mechanical performances.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Ting Liu et al.
Summary: In this study, two types of polymeric periodic hybrid (PPH) structures with different cell designs were manufactured using 3D printing and polylactic acid (PLA) as the main material. The mechanical characteristics of these structures under compression were investigated both experimentally and numerically. The results showed that the PPH structures with foam filling in re-entrant cells exhibited higher elastic modulus and peak stress compared to those with foam filling in hexagonal cells. The deformation processes of the PPH structures were also found to be more stable.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Ramakrishna Doodi et al.
Summary: The modern additive manufacturing process allows for the production of lattice structures with improved mechanical properties. Understanding the designability of lattice geometries and their compressive strength is crucial for the commercial application of lightweight lattice structures. Inspired by the overlapping pattern of fish scales and circular patterns observed in bamboo structures, a novel hybrid lattice structure was developed. Different lattice cell designs with varying overlapping areas and unit wall thickness were modeled and 3D-printed. The compressive response of the printed specimens was tested and compared to simulation results, and the best lattice structure was selected for energy absorption applications in aerospace and defense sectors.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Mechanics
Amin Farrokhabadi et al.
Summary: In this study, an analytical model based on classical laminate theory is proposed to predict the mechanical characteristics of 3D printed fiber-reinforced PLA honeycomb structures. The results show that using fiber-reinforced PLA can lead to higher rigidity and strength compared to pure isotropic materials. Tensile tests and finite element studies are conducted to verify the model, and good agreement is found between experimental, numerical, and analytical results. The study also examines the impact of using commingled yarn and conducts compression tests to evaluate the energy absorption capacity of the structures.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2023)
Article
Engineering, Multidisciplinary
Xueli Zhou et al.
Summary: Mechanical metamaterials are functional materials with extraordinary mechanical properties and designability. The limitations of traditional technology have restricted research on mechanical metamaterials to theoretical and simulation analysis. However, the rapid development of 3D printing technology has provided a means for manufacturing mechanical metamaterials with complex structures, especially in combination with 4D printing of smart materials. This article outlines the recent advances in 3D/4D printing of mechanical metamaterials, discussing the techniques and applications of 3D printing for mechanical metamaterial manufacturing, as well as the structures and designs of common mechanical metamaterials.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Engineering, Aerospace
Hussain Gharehbaghi et al.
Summary: This study introduced a new lattice structure based on a double octagonal bipyramid as the representative volume element. The mechanical properties of the lattice structure were investigated through experiments and numerical simulations. The results showed that the stiffness and yield strength of the lattice structure can be improved by using specific microstructure arrangement and functionally graded materials.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Amin Farrokhabadi et al.
Summary: This study develops analytical equations to predict the mechanical properties of a new orthotropic accordion morphing honeycomb structure. The experimental validation and finite element simulations confirm the accuracy of the analytical solutions. The proposed structure exhibits flexible response and high stiffness, making it suitable for aerospace morphing structures.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2022)
Review
Materials Science, Multidisciplinary
Matheus Brendon Francisco et al.
Summary: This manuscript reviews over 150 papers on energy absorption of auxetic structures, highlighting the importance of additive manufacturing and numerical analysis in samples manufacturing. It also discusses various cell models related to auxetic structures, providing additional guidelines for engineers and designers.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Ngoc San Ha et al.
Summary: This study proposed a new bio-inspired hierarchical circular honeycomb (BHCH) with excellent energy absorption capacity. The experimental results showed that BHCH outperformed the conventional circular honeycomb in terms of energy absorption and had significantly higher relative stiffness, strength, and energy absorption than other cellular structures. The theoretical model analysis further demonstrated the enhanced energy absorption mechanism of BHCH.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Engineering, Manufacturing
Kadir Gunaydin et al.
Summary: The effect of using multiple materials within hexagonal and re-entrant cellular structures on their performance was investigated. The study found that deploying a multi-material approach significantly enhanced the energy absorption, compressive strength, and modulus values of the cellular structures.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Enrique Cuan-Urquizo et al.
Summary: The elastic response of arc structures fabricated using curved-layered fused deposition modeling was studied using the finite element method, focusing on the influence of structural parameters such as subtending angle, overlap between layers, and relative density. The study found that the overlap between layers had a high influence on the mechanical response of such structures. Experimental results showed good agreement with the stiffness range predicted by the FEM model, with microstructural characterization revealing more defects for higher lattice porosity values, affecting structural properties.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Mechanics
Hossein Veisi et al.
Summary: A novel theoretical model based on classical laminate theory was developed to predict the equivalent mechanical properties of re-entrant lattice structures composed of continuous fiber reinforced composite struts. The model was validated using experimental results and finite element simulations, and a parametric study was conducted to investigate the effects of parameters on the structure.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Amin Farrokhabadi et al.
Summary: A novel theoretical model is developed based on the energy method to predict the equivalent mechanical properties of a new morphing structure with zero Poisson's ratio. The use of glass fiber in the proposed cruciform honeycomb structure results in higher strength compared to structures made of isotropic materials. Geometric effects on the equivalent properties are examined through a parametric study, and appropriate failure criteria are used to obtain the tensile and compressive strength of the structure. The extracted properties are then utilized in nonlinear analysis to enhance the performance of morphing structures under different loads, with validation through experimental tests and finite element methods.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Chang Qi et al.
Summary: In this study, the mechanical properties of REC honeycombs with different geometric parameters were thoroughly investigated through finite element simulations and theoretical analyses. It was found that adjusting the geometric parameters of the unit cell can tailor the crushing stress, energy absorption characteristics, and NPR value of the honeycomb, triggering specific deformation mechanisms at meso and macro scales. The study provides insights for engineering applications by revealing the effects of geometric parameters on the energy absorption capabilities and NPR values of REC honeycombs.
THIN-WALLED STRUCTURES
(2021)
Article
Chemistry, Physical
Hafizur Rahman et al.
Summary: This study investigates the mechanical performance and energy absorption capacity of bio-inspired lattice structures with gradient lattices made of soft and hard materials by changing unit cell size and arrangement. The research demonstrates that gradual changes in unit cell size and the rational combination of soft and hard materials can significantly improve energy absorption and mechanical performance, making the lattice structures suitable for multifunctional applications.
Article
Materials Science, Multidisciplinary
Long Bai et al.
Summary: Curving lattice structures, with controllable mechanical properties, low weight, and high strength, offer a promising option for various industries. By introducing a curving lattice design strategy, stress concentration at nodes can be effectively relieved, leading to significant improvements in mechanical properties.
MATERIALS & DESIGN
(2021)
Article
Engineering, Manufacturing
Mohammad Sadeghzade et al.
Summary: Analytical relationships were developed to calculate the mechanical properties of a new porous material based on octagonal bipyramid micro-architecture, validated through finite element modeling and compressive test experiments. The effect of changes in geometric parameters on mechanical behavior was evaluated through analytical, numerical, and experimental results.
ADDITIVE MANUFACTURING
(2021)
Article
Materials Science, Multidisciplinary
S. Higuera et al.
Summary: The study investigated the mechanical properties and energy absorption of thermoplastic sheet gyroid structures by testing various thermoplastic materials with different cell sizes and volume fractions, demonstrating that smaller cells and higher volume fractions contribute to higher elastic geometrical stiffness and energy absorption.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Engineering, Multidisciplinary
Chao Quan et al.
COMPOSITES PART B-ENGINEERING
(2020)
Article
Engineering, Manufacturing
Janos Plocher et al.
ADDITIVE MANUFACTURING
(2020)
Article
Engineering, Civil
Abdallah Ghazlan et al.
THIN-WALLED STRUCTURES
(2020)
Article
Multidisciplinary Sciences
Abdallah Ghazlan et al.
SCIENTIFIC REPORTS
(2020)
Article
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Chao Hu et al.
COMPOSITES PART B-ENGINEERING
(2020)
Article
Engineering, Aerospace
Mengchuan Xu et al.
AEROSPACE SCIENCE AND TECHNOLOGY
(2020)
Article
Engineering, Mechanical
Zhang Wen et al.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2019)
Article
Engineering, Civil
Qiuyu Lu et al.
THIN-WALLED STRUCTURES
(2019)
Article
Chemistry, Physical
Long Bai et al.
Article
Mechanics
Wenfeng Hao et al.
COMPOSITE STRUCTURES
(2019)
Article
Materials Science, Composites
Behnam Akhoundi et al.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2019)
Article
Engineering, Mechanical
Vijayanand Rajendra Boopathy et al.
RAPID PROTOTYPING JOURNAL
(2019)
Article
Nanoscience & Nanotechnology
Md. Nizam Uddin et al.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2019)
Article
Computer Science, Artificial Intelligence
Dongshu Wang et al.
Article
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Zhibo Xin et al.
COMPOSITE STRUCTURES
(2018)
Article
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Xin-Tao Wang et al.
JOURNAL OF COMPOSITE MATERIALS
(2018)
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Dahai Zhang et al.
THIN-WALLED STRUCTURES
(2017)
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Aniket Ingrole et al.
MATERIALS & DESIGN
(2017)
