Failure mechanism of PMI foam core sandwich beam in bending

Wang, Bo; Shi, Yunfeng; Zhou, Chuanli; Li, Tong

doi:10.1051/smdo/2015008

Cited by 11 publications

(9 citation statements)

References 27 publications

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“…However, the indentation failure mode does not lead to the final failure of the sandwich beam. More specifically, the core material experiences flexure and shear stress during the static loading . As the indenter moves further down, the shear stress gradually increases.…”

Section: Resultsmentioning

confidence: 99%

“…PMI foam could be simulated using the low-density foam model in Abaqus, a pseudo hyperelastic formulation, and its failure mechanics incorporated the maximum principal stress criterion. 31 As the compression and shear modes dominated the core deformation during the bending process, the current study required as input the stress–strain response of the foam for the uniaxial compression and tensile test. The Poisson’s ratio of the foam was assumed to be zero, implying that the evaluation of the stress–strain response became uncoupled along the principal deformation directions.…”

Section: Finite Element Modelingmentioning

confidence: 99%

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Effect of Resin Pins on the Failure Behavior of Foam Core Sandwich Beams under Three-Point Loading

Yan

Xu²,

Wang³

et al. 2022

ACS Omega

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Studies show limitations in increasing the mass fraction of resin pins in aviation components. The main objective of the present study is to investigate the effect of resin pins with different diameters and numbers on the bending performance and damage mode of sandwich structures with a constant mass fraction of resin pins. The obtained results show that the Φ2 specimen (i.e., the diameter of the resin pin in the sample is 2 mm) increases the load-bearing capacity by 41.8%. The deformation process of sandwich beams with and without resin pins is similar. However, the failure modes are different due to the diameters, amounts, and spacing of resin pins. Moreover, the uncertainty analysis of the experimental results is carried out by CT three-dimensional reconstruction of foam and finite element method (FEM). The obtained results show that the resin absorbed by the cells on the foam surface is the primary source of simulation errors. To resolve this problem, a new method is proposed to estimate the range of experimental results and improve the simulation accuracy by compensating for the diameter of the resin pin.

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Section: Resultsmentioning

confidence: 99%

Section: Finite Element Modelingmentioning

confidence: 99%

Effect of Resin Pins on the Failure Behavior of Foam Core Sandwich Beams under Three-Point Loading

Yan

Xu²,

Wang³

et al. 2022

ACS Omega

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“…Many studies in the field of sandwich structures have been conducted to assess the performance of their mechanical properties, both with and without simulations, and to understand the complex interactions between different composite materials. Moreover, several studies have demonstrated the behavior and failure modes of composite sandwich structures under bending load by considering the following factors: reinforcement materials [ 1 , 2 , 3 ], skin stacking sequences [ 4 ], foam types [ 5 , 6 , 7 , 8 , 9 , 10 , 11 ], adhesive types, and manufacturing conditions. Regarding high-performance applications, composite sandwich structures have been used in aeronautical materials [ 12 ], sailboat hulls [ 2 , 5 ], wind turbine blades [ 11 , 13 , 14 ], marine applications [ 15 ], and aerospace engineering [ 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Study on Flexural Behavior of Glass Fiber Reinforced Plastic Sandwich Composites Using Liquid Thermoplastic Resin

Alshahrani

Ahmed

2022

Polymers

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Experimental and numerical studies of composite sandwich structures are warranted to reap the benefits of these materials when they are well designed. In the current research, new liquid thermoplastic and epoxy resins were used to fabricate four composite sandwich panels with two additional foam types and different densities in the wind turbine industry. A comprehensive comparison of three-point bending test results was made. Finite-element-based simulations using the ABAQUS program with Hashin’s damage criterion were conducted to examine the failure behavior of the GFRP sandwich composites. The flexural behavior of the glass-fiber-reinforced plastic (GFRP) sandwich panels was investigated and compared with the experiments. The results show that the GF/PVC/Elium composite panel gives the highest load absorption, flexural strength, flexural modulus, core shear ultimate strength, and facing stress due to effect of the core foam and resin types. For the PVC foam core sandwich panel, using thermoplastic resin increased the flexural strength by 18% compared to that of the epoxy resin. The simulation results show excellent agreement between the finite-element-predicted failure loads and the experimental results.

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“…4,52,54 -56 Many works are devoted to obtaining and studying the characteristics of sandwich materials and products obtained using PMI. 8,57 -62 All these issues require separate consideration and are not the subject of this review.…”

Section: Introductionmentioning

confidence: 99%

Achievements and prospects for the synthesis of poly(meth)acrylimide foams. Stage of the thermal imidisation of polymer precursors

et al. 2020

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The review summarises the trends in the development of research on the synthesis of polymethacrylimides (PMIs) and polyacrylimides by the method of intramolecular thermal imidisation of (meth)acrylic polymers. Along with the widely used industry variant of PMI foam of the ‘Rohacell’ series based on bulk copolymers of methacrylonitrile and methacrylic acid, intensive research on alternative variants began after 2005. This review describes the main and side reactions when using polymer precursors of different structures as well as the effect of precursor composition and structure on the properties of the resulting poly(meth)acrylimides. It has been shown that the achievements of the last 15 years provide a basis for reducing the cost of poly(meth)acrylimides which will significantly expand the areas and scale of their application.

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Failure mechanism of PMI foam core sandwich beam in bending

Cited by 11 publications

References 27 publications

Effect of Resin Pins on the Failure Behavior of Foam Core Sandwich Beams under Three-Point Loading

Effect of Resin Pins on the Failure Behavior of Foam Core Sandwich Beams under Three-Point Loading

Study on Flexural Behavior of Glass Fiber Reinforced Plastic Sandwich Composites Using Liquid Thermoplastic Resin

Achievements and prospects for the synthesis of poly(meth)acrylimide foams. Stage of the thermal imidisation of polymer precursors

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