The influence of pin on the low-velocity impact performance of foam sandwich structure

Chen, Junzhen; Cheng, Long; Sun, Hongtai; Yao, Xuming; Fu, Chenchen; Jiang, Jianjun

doi:10.1016/j.ijmecsci.2022.108057

Cited by 17 publications

(4 citation statements)

References 77 publications

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“…However, most of these studies focused on the case of quasi-static loads, including indentation [ 25 , 26 ], three-point bending [ 27 , 28 , 29 ], energy absorption [ 30 , 31 , 32 , 33 ], and damage and fatigue [ 34 , 35 , 36 ]. Compared with research on sandwich structures with PMI foam cores under quasi-static loads, studies on the dynamic response of PMI foam sandwich structures are few [ 37 , 38 , 39 , 40 , 41 ]. Yang et al [ 38 ] studied the geometric scale effect on the dynamic response of sandwich panels with PMI foam cores.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Responses of Sandwich Beams with Polymethacrylimide (PMI) Foam Cores When Subjected to Impact Loading

et al. 2023

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This paper focusses on the load-sustaining and transfer mechanisms of sandwich beams with various types of PMI foam cores under low-velocity impact loading. In the case of quasi-static loading, the different failure modes, failure loads, and deflections were obtained, which agreed well with the results predicted by the theory of sandwich structure. In the case of impact loading, the clamped sandwich beams were subjected to the impact of a striker bar with a momentum of 10 kg∙m/s to 20 kg∙m/s. The de-acceleration of the strike bar was measured to analyze the impact force and energy absorption, and the corresponding failure modes were also obtained. The results showed that the impact force and the corresponding duration time increases with the increases in the thickness of the face sheet and the density of the core. In addition, the failure modes of the sandwich beams transferred from the shear failure mode to the tensile failure mode, which was attributed to the strength ratio between the bottom face sheet and the core. In combination with the experimental results and the plastic hinge theory, the deformation mechanisms of the different sandwich beams are also discussed.

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Section: Introductionmentioning

confidence: 99%

Dynamic Responses of Sandwich Beams with Polymethacrylimide (PMI) Foam Cores When Subjected to Impact Loading

et al. 2023

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“…As shown in Figure 5a,c, the loading and unloading parts of the curves of specimens A-1 and B-1 are smooth (the slight nonlinearity is caused by geometric nonlinearity during the impact process) without any slope change, indicating that no significant damage or cracking occurred in the face layer during the impact process. However, in Figure 5b,d, the initial parts of the stress-strain curves of specimens A-2 and B-2 are linear, corresponding to the linear elastic behavior of the core foam before the face layer is damaged [26]. As the strain continued to increase, the stress suddenly decreased, indicating the cracking of the face panel.…”

Section: Low-speed Impact Performancementioning

confidence: 95%

“…As the strain continued to increase, the stress suddenly decreased, indicating the cracking of the face panel. As the hammer continued to move However, in Figure 5b,d, the initial parts of the stress-strain curves of specimens A-2 and B-2 are linear, corresponding to the linear elastic behavior of the core foam before the face layer is damaged [26]. As the strain continued to increase, the stress suddenly decreased, indicating the cracking of the face panel.…”

Section: Low-speed Impact Performancementioning

confidence: 95%

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Investigating the Impact Behavior of Carbon Fiber/Polymethacrylimide (PMI) Foam Sandwich Composites for Personal Protective Equipment

Zhang,

Tian,

et al. 2024

Materials

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To improve the shock resistance of personal protective equipment and reduce casualties due to shock wave accidents, this study prepared four types of carbon fiber/polymethacrylimide (PMI) foam sandwich panels with different face/back layer thicknesses and core layer densities and subjected them to quasi-static compression, low-speed impact, high-speed impact, and non-destructive tests. The mechanical properties and energy absorption capacities of the impact-resistant panels, featuring ceramic/ultra-high molecular-weight polyethylene (UHMWPE) and carbon fiber/PMI foam structures, were evaluated and compared, and the feasibility of using the latter as a raw material for personal impact-resistant equipment was also evaluated. For the PMI sandwich panel with a constant total thickness, increasing the core layer density and face/back layer thickness enhanced the energy absorption capacity, and increased the peak stress of the face layer. Under a constant strain, the energy absorption value of all specimens increased with increasing impact speed. When a 10 kg hammer impacted the specimen surface at a speed of 1.5 m/s, the foam sandwich panels retained better integrity than the ceramic/UHMWPE panel. The results showed that the carbon fiber/PMI foam sandwich panels were suitable for applications that require the flexible movement of the wearer under shock waves, and provide an experimental basis for designing impact-resistant equipment with low weight, high strength, and high energy absorption capacities.

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Experimental investigation of crest-to-crest wave spring and new lattice structure with enhanced load bearing capacity

Venkata Subramanian,

Singh,

Kumar

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

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The influence of pin on the low-velocity impact performance of foam sandwich structure

Cited by 17 publications

References 77 publications

Dynamic Responses of Sandwich Beams with Polymethacrylimide (PMI) Foam Cores When Subjected to Impact Loading

Dynamic Responses of Sandwich Beams with Polymethacrylimide (PMI) Foam Cores When Subjected to Impact Loading

Investigating the Impact Behavior of Carbon Fiber/Polymethacrylimide (PMI) Foam Sandwich Composites for Personal Protective Equipment

Experimental investigation of crest-to-crest wave spring and new lattice structure with enhanced load bearing capacity

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