Impact Testing of 3D Re-Entrant Honeycomb Polyamide Structure Using Split Hopkinson Pressure Bar

Chen, Jiangping; Tao, Weijun; Pang, Shumeng

doi:10.3390/app11219882

Cited by 4 publications

(4 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A 3D re-entrant core was 3D printed and tested using a split Hopkinson pressure bar using wave form comparison (Chen et al, 2021a(Chen et al, , 2021b. The structure showed improved energy absorption under impact loading.…”

Section: Impact Responsementioning

confidence: 99%

Review on impact, crushing response and applications of re-entrant core sandwich structures

Al-Khazraji

2024

AEAT

View full text Add to dashboard Cite

Purpose Auxetic sandwich structures are gaining attention because of the negative Poisson’s ratio effect offered by these structures. Re-entrant core was one configuration of the auxetic structures. There is a growing concern about the design and behavior of re-entrant cores in aerospace, marine and protection applications. Several researchers proposed various designs of re-entrant core sandwiches with various materials. The purpose of this study is to review the most recent advances in re-entrant core sandwich structures. This review serves as a guide for researchers conducting further research in this wide field of study. Design/methodology/approach The re-entrant core sandwich structures were reviewed in terms of their design improvements, impact and quasi-static crushing responses. Several design improvements were reviewed including 2D cell, 3D cell, gradient, hierarchical and hybrid configurations. Some common applications of the re-entrant core sandwiches were given at the end of this paper with suggestions for future developments in this field. Findings Generally, the re-entrant configuration showed improved energy absorption and impact response among auxetic structures. The main manufacturing method for re-entrant core manufacturing was additive manufacturing. The negative Poisson’s ratio effect of the re-entrant core provided a wide area of research. Originality/value Generally, re-entrant cores were mentioned in the review articles as part of other auxetic structures. However, in this review, the focus was solely made on the re-entrant core sandwiches with their mechanics.

show abstract

Section: Impact Responsementioning

confidence: 99%

Review on impact, crushing response and applications of re-entrant core sandwich structures

Al-Khazraji

2024

AEAT

View full text Add to dashboard Cite

show abstract

“… Re-entrant hexagons (REHs) lattice: 2D view ( a ) and 3D unit cell ( b ). Pictures were taken from [ 32 ]. …”

Section: Figurementioning

confidence: 99%

Crashworthiness of Additively Manufactured Auxetic Lattices: Repeated Impacts and Penetration Resistance

Franzosi,

Colamartino,

Giustina

et al. 2023

Materials

View full text Add to dashboard Cite

Auxetic materials have recently attracted interest in the field of crashworthiness thanks to their peculiar negative Poisson ratio, leading to densification under compression and potentially being the basis of superior behavior upon impact with respect to conventional cellular cores or standard solutions. However, the empirical demonstration of the applicability of auxeticity under impact is limited for most known geometries. As such, the present work strives to advance the investigation of the impact behavior of auxetic meta-materials: first by selecting and testing representative specimens, then by proceeding with an experimental and numerical study of repeated impact behavior and penetration resistance, and finally by proposing a new design of a metallic auxetic absorber optimized for additive manufacturing and targeted at high-performance crash applications.

show abstract

“…Özen et al [19] also investigated the low-energy impact response of woven CFRP sandwich composite panels with 3D-printed thermoplastic ABS honeycomb and re-entrant cores, particularly their impact strength and energy dissipation behavior. Chen et al [20] performed a similar analysis on additive manufactured 3D re-entrant honeycombs under impact and quasi-static compression loading, in order to determine their energy absorption capability and failure modes. Ma et al [21] also conducted static and impact compression analyses to study the deformation behavior and energy absorption of composite re-entrant honeycomb cylindrical shells.…”

Section: Introductionmentioning

confidence: 99%

A 3D-Printed Honeycomb Cell Geometry Design with Enhanced Energy Absorption under Axial and Lateral Quasi-Static Compression Loads

et al. 2022

View full text Add to dashboard Cite

This work presents an innovative honeycomb cell geometry design with enhanced in-plane energy absorption under quasi-static lateral loads. Numerical and experimental compression tests results under axial and lateral loads are analyzed. The proposed cell geometry was designed to overcome the limitations posed by standard hexagonal honeycombs, which show relatively low stiffness and energy absorption under loads that have a significant lateral component. To achieve this, the new cell geometry was designed with internal diagonal walls to support the external walls, increasing its stiffness and impact energy absorption in comparison with the hexagonal cell. 3D-printed unit-cell specimens made from ABS thermoplastic material were subjected to experimental quasi-static compression tests, in both lateral and axial directions. Energy absorption was compared to that of the standard hexagonal cell, with the same mass and height. Finite element models were developed and validated using experimental data. Results show that the innovative geometry absorbs approximately 15% more energy under lateral compression, while maintaining the same level of energy absorption of the standard hexagonal cell in the axial direction. The present study demonstrates that the proposed cell geometry has the potential to substitute the standard hexagonal honeycomb in applications where significant lateral loads are present.

show abstract

Impact Testing of 3D Re-Entrant Honeycomb Polyamide Structure Using Split Hopkinson Pressure Bar

Cited by 4 publications

References 32 publications

Review on impact, crushing response and applications of re-entrant core sandwich structures

Review on impact, crushing response and applications of re-entrant core sandwich structures

Crashworthiness of Additively Manufactured Auxetic Lattices: Repeated Impacts and Penetration Resistance

A 3D-Printed Honeycomb Cell Geometry Design with Enhanced Energy Absorption under Axial and Lateral Quasi-Static Compression Loads

Contact Info

Product

Resources

About