“…To investigate the vibrational characteristics of the EBEP fc , in this study, the difference in the vibrational characteristics of the HP fc and EBEP fc were explored from the shear force proportion characteristics under a transverse static load, by using the method applied in our previous research [ 30 ]. Notably, although the inertial force caused by mass difference leads to differences in the dynamic and static mechanical properties of sandwich plates under transverse loading, when the structure is within the elastic range, its dynamic and static responses are usually positively correlated [ 30 , 32 ]. Therefore, a FE static loading simulation was used to explore the shear characteristics and the vibrational performance of the HP fc and EBEP fc .…”
Section: Sample Preparation and Experimental Methodsmentioning
confidence: 99%
“… The origin of the BEP. ( a ) An adult A. dichotoma beetle; ( b ) microstructure of an A. dichotoma forewing; ( c ) trabeculae in the forewing; and ( d ) a simple model of a trabecular structure (Adapted from reference [ 32 ] with permission). …”
The vibrational properties and mechanism of a foam-filling short basalt fiber reinforced epoxy resin composite beetle elytron plate (EBEPfc) were studied by experiments and the finite element (FE) method in this paper. The experimental results showed that the natural frequencies of the first two modes of the EBEPfc were very close to those of a foam-filling short basalt fiber reinforced epoxy resin composite honeycomb plate (HPfc), while the vibrational response of the EBEPfc was weaker than that of the HPfc, and the damping ratio was improved; the improvement of the second mode was significant. Therefore, the EBEPfc had a better vibration reduction performance and could directly replace the HPfc in engineering applications. The FE results showed that foam filling enhanced the shear stiffness of the whole core structure, and had a more obvious effect on the shear stiffness of the HPfc. Meanwhile, it particularly reduced the shear force proportions and contributed to the protection of the skin and core skeleton. The mechanisms of the vibrational characteristics of these two types of sandwich plates were explored from the perspective of the equivalent cross-sectional area, shear stiffness, shear strain energy per unit volume and friction. These results provide a valuable reference for the promotion and application of EBEPfc in the fields of vibration reduction and seismic resistance.
“…To investigate the vibrational characteristics of the EBEP fc , in this study, the difference in the vibrational characteristics of the HP fc and EBEP fc were explored from the shear force proportion characteristics under a transverse static load, by using the method applied in our previous research [ 30 ]. Notably, although the inertial force caused by mass difference leads to differences in the dynamic and static mechanical properties of sandwich plates under transverse loading, when the structure is within the elastic range, its dynamic and static responses are usually positively correlated [ 30 , 32 ]. Therefore, a FE static loading simulation was used to explore the shear characteristics and the vibrational performance of the HP fc and EBEP fc .…”
Section: Sample Preparation and Experimental Methodsmentioning
confidence: 99%
“… The origin of the BEP. ( a ) An adult A. dichotoma beetle; ( b ) microstructure of an A. dichotoma forewing; ( c ) trabeculae in the forewing; and ( d ) a simple model of a trabecular structure (Adapted from reference [ 32 ] with permission). …”
The vibrational properties and mechanism of a foam-filling short basalt fiber reinforced epoxy resin composite beetle elytron plate (EBEPfc) were studied by experiments and the finite element (FE) method in this paper. The experimental results showed that the natural frequencies of the first two modes of the EBEPfc were very close to those of a foam-filling short basalt fiber reinforced epoxy resin composite honeycomb plate (HPfc), while the vibrational response of the EBEPfc was weaker than that of the HPfc, and the damping ratio was improved; the improvement of the second mode was significant. Therefore, the EBEPfc had a better vibration reduction performance and could directly replace the HPfc in engineering applications. The FE results showed that foam filling enhanced the shear stiffness of the whole core structure, and had a more obvious effect on the shear stiffness of the HPfc. Meanwhile, it particularly reduced the shear force proportions and contributed to the protection of the skin and core skeleton. The mechanisms of the vibrational characteristics of these two types of sandwich plates were explored from the perspective of the equivalent cross-sectional area, shear stiffness, shear strain energy per unit volume and friction. These results provide a valuable reference for the promotion and application of EBEPfc in the fields of vibration reduction and seismic resistance.
“…Therefore, the following is a brief review of the research progress related to the mechanical properties of foam-filled sandwich plates.Figure 1.The origin of BEPs. 15 (a) Adult A. dichotoma beetle; (b) microstructure of the A. dichotoma forewing; (c) trabeculae in the forewing; (d) EBEP; (e) GBEP.…”
Section: Introductionmentioning
confidence: 99%
“…The origin of BEPs. 15 (a) Adult A. dichotoma beetle; (b) microstructure of the A. dichotoma forewing; (c) trabeculae in the forewing; (d) EBEP; (e) GBEP.…”
To investigate a new type of bionic energy-saving sandwich plate—the beetle elytron plate (BEP), the compressive mechanical properties of short basalt fiber reinforced epoxy resin composite BEPs and honeycomb plates with different polyvinyl chloride foam densities and height-to-thickness ratios were investigated. The mechanism of the coupling effect of the core structure, foam density and height-to-thickness ratio was revealed by observing the failure mode of the outer and inner ring honeycomb walls. This study can provide useful instruction for designing lightweight sandwich structures and accelerate the application of BEPs in engineering.
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