Characterization of the shear/compression failure envelope of Rohacell foam

Benderly, D.; Putter, Sander de

doi:10.1016/s0142-9418(03)00061-8

Cited by 23 publications

(22 citation statements)

References 6 publications

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“…For instance, Benderly and Putter [9] have studied sandwich panels comprising polymethacrylimide (PMI) foam cores (aircraft grade), tested at three temperatures (À40°C, room temperature (RT), and 70°C) and subjected to four point bending. The authors' purpose was to characterise the shear and compressive behaviour of the PMI foam, with the adopted test method producing both shear and compressive stresses in the foam.…”

Section: Introductionmentioning

confidence: 99%

Effects of elevated temperature on the shear response of PET and PUR foams used in composite sandwich panels

Garrido

Correia

Keller

2015

Construction and Building Materials

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Section: Introductionmentioning

confidence: 99%

Effects of elevated temperature on the shear response of PET and PUR foams used in composite sandwich panels

Garrido

Correia

Keller

2015

Construction and Building Materials

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“…In the literature experimental studies can be found, investigating the core failure under combined loading condition to identify the exponent n for different core materials. However, the experimental results are inconsistent describing partly different coefficients for the same core material [19][20][21][22]. Depending on core material and the experimental setup the coefficient differs between a linear and quadratic interpolation.…”

Section: Development Of a Failure Criterionmentioning

confidence: 99%

Multiscale Modeling Methods for Analysis of Failure Modes in Foldcore Sandwich Panels

2015

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The paper presents an homogenised core model suitable for use in the analysis of fuselage sandwich panels with folded composite cores under combined loading conditions. Within a multiscale numerical design process a failure criterion was derived for describing the macroscopic behaviour of folded cores under combined loading using a detailed foldcore micromodel. The multiscale modelling method was validated by simulation of combined compression/bending failure of foldcore sandwich panels.

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“…12 This factor was followed up and validated by Li et al and Benderly and Putter in their respective research of ROHACELL foam materials later. 13,14 However in their criteria there was no distinction between tension and the compression strength.…”

Section: Introductionmentioning

confidence: 99%

Computational plasticity model for hydrostatic pressure dependent foam materials

Chen

Wang

Zhang

2013

54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

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A computational plasticity model for hydrostatic pressure dependent foam materials is presented. A new semi-associated flow rule is proposed for a three-parameter generalized initial yield criterion which is based on the second invariant of deviatoric tensor and the first invariant of spherical tensor. The parameters to determine the flow vector and the initial yield failure criterion are based on the three uniaxial strengths, which are obtained by uniaxial tension, compression and pure shear test respectively. Different from other wellknown flow rules which depends on the plastic Poisson ratio, this flow rule uses the standard strength values for plasticity flow and is more convenient and robust to be used. An implicit integration method by return mapping algorithm is carried out and the consistent tangent Jacobian matrix is also presented for the implicit integration. The plasticity model is implemented into the commercial finite element software ABAQUS for implicit finite element analysis. Simple numerical results are validated by the test results of foam materials. Nomenclature 1 I = spherical tensor invariant 2 J = deviatoric tensor invariant t  = tension strength c  = compression strength s  = shear strength 0 t  = initial yield tension strength 0 c  = initial yield compression strength 0 s  = initial yield shear strength   = plastic multiplier of the increment.p e  = equivalent plastic strain.  = coefficient of flow n = increment step number m = iteration step number k = coefficient of increment equivalent plastic strain G = shear modulus K = bulk modulus 2 N = flow tensor d σ = deviatoric stress tensor I = second order identity tensor 4 I = fourth order identity tensor. ε = increment of strain tensor  tr ε = increment of trial strain tensor p ε = increment of plastic strain tensor p d ε = increment of deviatoric plastic strain tensor p v ε = increment of volumetric plastic strain tensor y σ = hardening strength tensor 0 y σ = initial yield strength tensor r = hardening function vector y H = hardening parameter vector tr σ = trial stress tensor e D = elastic stiffness matrix ep D = elasto-plastic stiffness matrix.

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Characterization of the shear/compression failure envelope of Rohacell foam

Cited by 23 publications

References 6 publications

Effects of elevated temperature on the shear response of PET and PUR foams used in composite sandwich panels

Effects of elevated temperature on the shear response of PET and PUR foams used in composite sandwich panels

Multiscale Modeling Methods for Analysis of Failure Modes in Foldcore Sandwich Panels

Computational plasticity model for hydrostatic pressure dependent foam materials

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