Predictive Models for Elastic Bending Behavior of a Wood Composite Sandwich Panel

Mohammadabadi, Mostafa; Jarvis, James; Yadama, Vikram; Cofer, William F.

doi:10.3390/f11060624

Cited by 13 publications

(12 citation statements)

References 16 publications

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“…Using a finite element (FE) model validated for a biaxial corrugated geometry [ 29 ], a new geometry was designed to be used as a core in the fabrication of multilayered sandwich panels [ 30 ]. The objective of this study is to fabricate full-size (1.2 m by 2.4 m) wood strand composite sandwich panels with cores having this new biaxial corrugated configuration ( Figure 1 a) and evaluate their structural and thermal performance.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Wood Composite Sandwich Panels as a Promising Renewable Building Material

2021

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During this study, full-size wood composite sandwich panels, 1.2 m by 2.4 m (4 ft by 8 ft), with a biaxial corrugated core were evaluated as a building construction material. Considering the applications of this new building material, including roof, floor, and wall paneling, sandwich panels with one and two corrugated core(s) were fabricated and experimentally evaluated. Since primary loads applied on these sandwich panels during their service life are live load, snow load, wind, and gravity loads, their bending and compression behavior were investigated. To improve the thermal characteristics, the cavities within the sandwich panels created by the corrugated geometry of the core were filled with a closed-cell foam. The R-values of the sandwich panels were measured to evaluate their energy performance. Comparison of the weight indicated that fabrication of a corrugated panel needs 74% less strands and, as a result, less resin compared to a strand-based composite panel, such as oriented strand board (OSB), of the same size and same density. Bending results revealed that one-layer core sandwich panels with floor applications under a 4.79 kPa (100 psf) bending load are able to meet the smallest deflection limit of L/360 when the span length (L) is 137.16 cm (54 in) or less. The ultimate capacity of two-layered core sandwich panels as a wall member was 94% and 158% higher than the traditional walls with studs under bending and axial compressive loads, respectively. Two-layered core sandwich panels also showed a higher ultimate capacity compared to structural insulated panels (SIP), at 470% and 235% more in bending and axial compression, respectively. Furthermore, normalized R-values, the thermal resistance, of these sandwich panels, even with the presence of thermal bridging due to the core geometry, was about 114% and 109% higher than plywood and oriented strand board, respectively.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Wood Composite Sandwich Panels as a Promising Renewable Building Material

2021

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“…Plywood is a very common and long-used building material. It can be made from veneers of different tree species, which affects the physical and mechanical properties of plywood [4][5][6][7][8]. Important factors influencing the properties of plywood include design features such as the number, thickness and orientation of individual layers and the technological process of panel production [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Puck [24,25] (6) Most researchers have studied the application of failure criteria to unidirectional (UD) composites [26][27][28][29][30][31][32][33][34]. In these cases, the criteria predict the failure loads more or less satisfactorily.…”

Section: Introductionmentioning

confidence: 99%

Application of Failure Criteria on Plywood under Bending

Merhar

2021

Polymers

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In composite materials, the use of failure criteria is necessary to determine the failure forces. Various failure criteria are known, from the simplest ones that compare individual stresses with the corresponding strength, to more complex ones that take into account the sign and direction of the stress, as well as mutual interactions of the acting stresses. This study investigates the application of the maximum stress, Tsai-Hill, Tsai-Wu, Puck, Hoffman and Hashin criteria to beech plywood made from a series of plies of differently oriented beech veneers. Specimens were cut from the manufactured boards at various angles and loaded by bending to failure. The mechanical properties of the beech veneer were also determined. The specimens were modelled using the finite element method with a composite modulus and considering the different failure criteria where the failure forces were calculated and compared with the measured values. It was found that the calculated forces based on all failure criteria were lower than those measured experimentally. The forces determined using the maximum stress criterion showed the best agreement between the calculated and measured forces.

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“…Tests on the properties of timber are available in the literature; however, very often they relate to selected issues only, for example: the bending strength [31,32] or composite wood [33], determination of modulus of elasticity (MOE) [32], properties during compression [34], tensile [35] and surface properties [36]. It is popular to study timber depending on geographical origin (terrain conditions) due to its mechanical properties [36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Symmetric Nature of Stress Distribution in the Elastic-Plastic Range of Pinus L. Pine Wood Samples Determined Experimentally and Using the Finite Element Method (FEM)

et al. 2020

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This article presents the results of experimental research on the mechanical properties of pine wood (Pinus L. Sp. Pl. 1000. 1753). In the course of the research process, stress-strain curves were determined for cases of tensile, compression and shear of standardized shapes samples. The collected data set was used to determine several material constants such as: modulus of elasticity, shear modulus or yield point. The aim of the research was to determine the material properties necessary to develop the model used in the finite element analysis (FEM), which demonstrates the symmetrical nature of the stress distribution in the sample. This model will be used to analyze the process of grinding wood base materials in terms of the peak cutting force estimation and the tool geometry influence determination. The main purpose of the developed model will be to determine the maximum stress value necessary to estimate the destructive force for the tested wood sample. The tests were carried out for timber of around 8.74% and 19.9% moisture content (MC). Significant differences were found between the mechanical properties of wood depending on moisture content and the direction of the applied force depending on the arrangement of wood fibers. Unlike other studies in the literature, this one relates to all three stress states (tensile, compression and shear) in all significant directions (anatomical). To verify the usability of the determined mechanical parameters of wood, all three strength tests (tensile, compression and shear) were mapped in the FEM analysis. The accuracy of the model in determining the maximum destructive force of the material is equal to the average 8% (for tensile testing 14%, compression 2.5%, shear 6.5%), while the average coverage of the FEM characteristic with the results of the strength test in the field of elastic-plastic deformations with the adopted ±15% error overlap on average by about 77%. The analyses were performed in the ABAQUS/Standard 2020 program in the field of elastic-plastic deformations. Research with the use of numerical models after extension with a damage model will enable the design of energy-saving and durable grinding machines.

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Predictive Models for Elastic Bending Behavior of a Wood Composite Sandwich Panel

Cited by 13 publications

References 16 publications

Evaluation of Wood Composite Sandwich Panels as a Promising Renewable Building Material

Evaluation of Wood Composite Sandwich Panels as a Promising Renewable Building Material

Application of Failure Criteria on Plywood under Bending

Symmetric Nature of Stress Distribution in the Elastic-Plastic Range of Pinus L. Pine Wood Samples Determined Experimentally and Using the Finite Element Method (FEM)

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