Energy absorption of a bio-inspired honeycomb sandwich panel

This paper is aimed to investigate the crushing response of single square honeycomb panels under quasi-static compression loading. Two types of materials are used in this study, which refers to 100 % polylactic acid (PLA) and 70 % PLA filled 30 % carbon fibre (PLA/CF). Single honeycomb panels were fabricated through additive manufacturing technique, and assembled using slotting technique. The effect of boundary factor on the single square honeycomb panels have been studied, which refers to none, single-side, double-side boundary conditions. The effect of material properties on the crushing response has also involved. For the tensile test, it was concluded that the PLA/CF specimen offered the higher young modulus with 428.75 MPa than 360.76 MPa of PLA specimen. For the quasi-static compression test, the compressive modulus and strength of the single honeycomb sandwich panel showed 489.69 MPa and 18.32 MPa with boundary type 1, which provided the highest value compared to other two boundary condition types. Moreover, the square honeycomb sandwich panels with PLA/CF material and type 3 boundary condition offered the better crushing performance on energy absorption (EA) with 66.42 kJ and specific energy absorption (SEA) with 2282.47 kJ/kg. In addition, the crushing behaviour and failure mode were also involved and discussed in this study.

Download Full-text

3D Energy Absorption Diagram Construction of Paper Honeycomb Sandwich Panel

Shock and Vibration ◽

10.1155/2018/4067062 ◽

2018 ◽

Vol 2018 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Dongmei Wang ◽

Ziyou Bai ◽

Qianghua Liao

Keyword(s):

Energy Absorption ◽

Unit Volume ◽

Sandwich Panel ◽

Standard Condition ◽

Optimized Design ◽

Structural Factors ◽

Static Compression ◽

Honeycomb Sandwich ◽

Paper Honeycomb ◽

Energy Absorption Diagram

Paper honeycomb sandwich panel is an environment-sensitive material. Its cushioning property is closely related to its structural factors, the temperature and humidity, random shocks, and vibration events in the logistics environment. In order to visually characterize the cushioning property of paper honeycomb sandwich panel in different logistics conditions, the energy absorption equation of per unit volume of paper honeycomb sandwich panel was constructed by piecewise function. The three-dimensional (3D) energy absorption diagram of paper honeycomb sandwich panel was constructed by connecting the inflexion of energy absorption curve. It takes into account the temperature, humidity, strain rate, and characteristics of the honeycomb structure. On the one hand, this diagram breaks through the limitation of the static compression curve of paper honeycomb sandwich panel, which depends on the test specimen and is applicable only to the standard condition. On the other hand, it breaks through the limitation of the conventional 2D energy absorption diagram which has less information. Elastic modulus was used to normalize the plateau stress and energy absorption per unit volume. This makes the 3D energy absorption diagram universal for different material sandwich panels. It provides a new theoretical basis for packaging optimized design.

Download Full-text

A Virtual Testing Approach for Honeycomb Sandwich Panel Joints in Aircraft Interior

10.1007/978-3-662-60276-8 ◽

2020 ◽

Cited By ~ 1

Author(s):

Ralf Seemann

Keyword(s):

Sandwich Panel ◽

Virtual Testing ◽

Honeycomb Sandwich ◽

Testing Approach

Download Full-text

Out-of-plane static compression and energy absorption of paper hierarchical corrugation sandwich panels

The Journal of Strain Analysis for Engineering Design ◽

10.1177/03093247211008566 ◽

2021 ◽

pp. 030932472110085

Author(s):

Huineng Wang ◽

Yanfeng Guo ◽

Yungang Fu ◽

Dan Li

Keyword(s):

Yield Strength ◽

Bearing Capacity ◽

Energy Absorption ◽

Sandwich Panel ◽

Second Order ◽

Compression Rate ◽

Static Compression ◽

First Order ◽

Out Of Plane ◽

Analytical Approaches

This study introduces the opinion of the corrugation hierarchy to develop the second-order corrugation paperboard, and explore the deformation characteristics, yield strength, and energy absorbing capacity under out-of-plane static evenly compression loading by experimental and analytical approaches. On the basis of the inclined-straight strut elements of corrugation unit and plastic hinge lines, the yield and crushing strengths of corrugation unit were analyzed. This study shows that as the compressive stress increases, the second-order corrugation core layer is firstly crushed, and the first-order corrugation structures gradually compacted until the failure of entire structure. The corrugation type has an obvious influence on the yield strength of the corrugation sandwich panel, and the yield strength of B-flute corrugation sandwich panel is wholly higher than that of the C-flute structure. At the same compression rate, the flute type has a significant impact on energy absorption, and the C-flute second-order corrugation sandwich panel has better bearing capacity than the B-flute structure. The second-order corrugation sandwich panel has a better bearing capacity than the first-order structure. The static compression rate has little effect on the yield strength and deformation mode. However, with the increase of the static compression rate, the corrugation sandwich panel has a better cushioning energy absorption and material utilization rate.

Download Full-text

Numerical and experimental investigation for enhancing the energy absorption capacity of the novel three-dimensional printed sandwich structures

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications ◽

10.1177/1464420721997490 ◽

2021 ◽

pp. 146442072199749

Author(s):

H Geramizadeh ◽

S Dariushi ◽

S Jedari Salami

Keyword(s):

Energy Absorption ◽

Sandwich Structures ◽

Three Dimensional ◽

Absorption Capacity ◽

The Novel ◽

Energy Absorption Capacity ◽

Fused Deposition ◽

Honeycomb Sandwich ◽

Out Of Plane ◽

Vertical Walls

The current study focuses on designing the optimal three-dimensional printed sandwich structures. The main goal is to improve the energy absorption capacity of the out-of-plane honeycomb sandwich beam. The novel Beta VI and Alpha VI were designed in order to achieve this aim. In the Beta VI, the connecting curves (splines) were used instead of the four diagonal walls, while the two vertical walls remained unchanged. The Alpha VI is a step forward on the Beta VI, which was promoted by filleting all angles among the vertical walls, created arcs, and face sheets. The two offered sandwich structures have not hitherto been provided in the literature. All models were designed and simulated by the CATIA and ABAQUS, respectively. The three-dimensional printer fabricated the samples by fused deposition modeling technique. The material properties were determined under tensile, compression, and three-point bending tests. The results are carried out by two methods based on experimental tests and finite element analyses that confirmed each other. The achievements provide novel insights into the determination of the adequate number of unit cells and demonstrate the energy absorption capacity of the Beta VI and Alpha VI are 23.7% and 53.9%, respectively, higher than the out-of-plane honeycomb sandwich structures.

Download Full-text