A homogeneous substitute material for the core layer of photovoltaic composite structures

Aßmus, Marcus; Nordmann, Joachim; Naumenko, Konstantin; Altenbach, Holm

doi:10.1016/j.compositesb.2016.12.042

Cited by 18 publications

(8 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Laminated glass is usually designed as a three-layered plate, with two stiff facings and a soft polymeric interlayer, see Schulze et al (2012) and Aşık & Tezcan (2005). For photovoltaic panels, the ratio of the shear moduli of a glass skin and polymeric layer encapsulating solar cells, is within the range 10 −5 ∼ 10 −2 , depending on temperature and polymer type, see Schulze et al (2012), Altenbach et al (2015), Aßmus et al (2016), Aßmus et al (2017), and Naumenko & Eremeyev (2014).…”

Section: Introductionmentioning

confidence: 99%

Dispersion of elastic waves in a strongly inhomogeneous three-layered plate

Kaplunov

Приказчиков

Prikazchikova

2017

International Journal of Solids and Structures

View full text Add to dashboard Cite

Elastic wave propagation in a three-layered plate with high-contrast mechanical and geometric properties of the layers is analysed. Four specific types of contrast arising in engineering practice, including the design of stiff and lightweight structures, laminated glass, photovoltaic panels, and electrostatic precipitators in gas filters, are considered. For all of them the cut-off frequency of the first harmonic is close to zero. Two-mode asymptotic polynomial expansions of the Rayleigh-Lamb dispersion relation approximating both the fundamental bending wave and the first harmonic, are derived. It is established that these can be either uniform or composite ones, valid only over non-overlapping vicinities of zero and the lowest cut-off frequencies. The partial differential equations of motion associated with two-mode shortened dispersion relations are also presented.

show abstract

Section: Introductionmentioning

confidence: 99%

Dispersion of elastic waves in a strongly inhomogeneous three-layered plate

Kaplunov

Приказчиков

Prikazchikova

2017

International Journal of Solids and Structures

View full text Add to dashboard Cite

show abstract

“…In addition to the For extension in the context of constitutive behavior, anisotropy must also be considered. As shown in [5], the isotropy assumption from the Naumenkonian homogeneity postulate [11] can loose validity. Therein, the orientation dependence of the three dimensional continuum [13,15] is transferred to a planar continuum in the sense of Rychlewski [6] also.…”

Section: Discussionmentioning

confidence: 99%

Summary and Outlook

Aßmus¹

2018

Structural Mechanics of Anti-Sandwiches

View full text Add to dashboard Cite

In present treatise an approach for structural analysis of Anti-Sandwiches is presented. In principle, theories for thin-walled structures are suitable for mechanical analysis at such configurations. Since mechanical properties and structural thicknesses of the different layers of an Anti-Sandwich differ widely, classical approaches for composite structures fail to predict correct results. Therefore, a layer-wise approach is chosen within the present discourse. Each layer is considered as a single continuum, while all equations are related to the middle surface of the structure.First, the direct approach is used to set up the underlying theory for two dimensional continua. In addition to the displacement field, this continuum also possesses a rotation field for describing the kinematics. This concept has physical weaknesses, but results in a mathematically well-posed problem for the efficient treatment of boundary value problems. The description is limited to geometric and physical linearity. The work follows the direct notation. This allows a concise presentation of the basic equations, but without completely falling into the Bourbakian style [7]. Furthermore, a formalization of the governing equations of the plane two dimensional continuum is carried out.Based on this, the coupling of three layers of such a continuum to a composite is presented. In the process, assumptions and restrictions are discussed. The result is the formulation of the boundary value problem of the overall structure for a threelayered composite structure. The strategy is now known as extended layer-wise theory which is a generalized approach for three-layered composite structures with arbitrary mechanical stiffnesses and structural thicknesses of the layers.Since the solution of the formulated boundary value problem in closed form usually tightens a too narrow a frame for practical problems, a procedure for the numerical treatment by means of the finite element method is introduced. Therefore, a variational principle is exploited to gain a weak form of governing equations. This form is used to derive the discretized equation of motion. By using a classic

show abstract

“…Furthermore, BERTRAM & OLSCHEWSKI [4] showed that this concept is also applicable to viscoelasticity, while CAROL, RIZZI & WILLAM [8] have extended the concept to damage. Such improvements will be useful considering practical applications of elastic surfaces, as shown for example in [2].…”

Section: Discussionmentioning

confidence: 99%

Projector representation of isotropic linear elastic material laws for directed surfaces

2017

View full text Add to dashboard Cite

In the framework of linear elasticity, it is possible to use eigenspace projectors to describe the elasticity tensor, at least for special cases of material symmetries. A similar procedure is also advantageous in the context of directed surfaces. It is thus possible to introduce this representation to stiffness measures of thin-walled members. Hereby, we reduce our considerations to an elastic mid-surface, where the in-plane, out-of-plane, and transverse shear states are uncoupled, but superposed eventually. Thereby, we introduce a unique decomposition of the stiffness measures for the considered deformation states, while we limit our considerations to homogeneous materials without pronounced orientation dependency. For each of these three states, eigenvalues of the stiffness tensors are evaluated based on engineering material parameters. Finally, the whole procedure allows for the clear distinction of dilatoric and deviatoric portions in the constitutive equations.After all, a compact and mathematically easy-to-handle representation for the stiffness tensors with respect to in-plane, out-of-plane, and transverse shear state has been found. Thereby, we show correlations to classical representations as well as advantages due to the clarity of present scheme.

show abstract

A homogeneous substitute material for the core layer of photovoltaic composite structures

Cited by 18 publications

References 32 publications

Dispersion of elastic waves in a strongly inhomogeneous three-layered plate

Dispersion of elastic waves in a strongly inhomogeneous three-layered plate

Summary and Outlook

Projector representation of isotropic linear elastic material laws for directed surfaces

Contact Info

Product

Resources

About