Fiber contribution on elastic properties of cellulose composites: A multiscale numerical study

A finite element model with periodic boundary conditions was developed to investigate the influence of different Z-pin parameters including diameter, spacing, and insertion angle of Z-pin on the elastic properties of composite laminates. Benchmark tests were carried out to verify the FE model and a series of parametric analyses were subsequently performed. In general, all the elastic moduli, excluding the through-thickness modulus ( Ez), decreased while Ez increased nonlinearly with increasing Z-pin diameter and decreasing spacing. The reduction of Ey (transverse modulus) was approximately 40% of that of Ex (longitudinal modulus), while the reduction of Gxy is similar to that of Ex. Besides, Gxz and Gyz were reduced by approximately half of the reduction of Gxy. Although the impact of insertion angle was obvious on Ez, it was negligible on the other five moduli.

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Nondimensional translational characteristics of elastomer components

Journal of Applied Engineering Design and Simulation ◽

10.24191/jaeds.v1i1.20 ◽

2021 ◽

Vol 1 (1) ◽

Author(s):

Andreas Dutzler ◽

◽

Christian Buzzi ◽

Martin Leitner ◽

◽

...

Keyword(s):

Elastic Properties ◽

Numerical Study ◽

Cross Sectional Area ◽

Sectional Area ◽

Cross Sectional ◽

Component Size ◽

Rail Vehicles ◽

Force Displacement

Elastomer components are used in both primary and secondary spring stages in bogies of rail vehicles. The design of spring components of a bogie requires knowledge of the calculation of the elastic properties of these components. An elastomer spring component is typically analyzed in the dimension to be investigated. Calculated force-displacement curves are directly related to the material and dimension of the component itself. The objective of this paper is to establish generalized or, in other words, universally valid force-displacement characteristics by breaking the entanglement with component size. The advantage of this approach is the extended validity of the results for a specific spring shape of any size. The simulations are performed only once for each shape and may be converted to any other size using the proposed methodology. A numerical study of a layer spring with rectangular cross-sectional area and fixed edges on both top and bottom sides serves as a reference example.

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Numerical Study of Elastic Properties of Porosity Controlled Flax/PP Nonwoven Composite

10.1007/978-3-030-84958-0_42 ◽

2021 ◽

pp. 396-404

Author(s):

Hajer Hadiji ◽

Wajdi Zouari ◽

Mustapha Assarar ◽

Bassem Zouari ◽

Floran Pierre ◽

...

Keyword(s):

Elastic Properties ◽

Numerical Study

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Numerical Study of Stresses around Holes Drilled and Filled by Expansive Cement: Case of Isotropic Linear Elastic Block of Rock

Advances in Materials Science and Engineering ◽

10.1155/2018/8718452 ◽

2018 ◽

Vol 2018 ◽

pp. 1-14

Author(s):

Mambou Ngueyep Luc Leroy ◽

Gael Nkenwoum Chebou

Keyword(s):

Finite Element ◽

Elastic Properties ◽

Numerical Study ◽

Hole Diameter ◽

Finite Element Code ◽

Normal Stresses ◽

Linear Elastic ◽

Diameter Hole ◽

Essential Problem ◽

Expansive Cement

This work dealt with an essential problem of fragmentation of rocks with expansive cement. The redistribution and magnitude of stresses and displacement generated around holes were done by using Ansys Inc. Code which is based on finite element code. Blocks of rock with one hole, two holes, and nine holes drilled in square mesh and staggered mesh have been considered. Numerical results reveal that many factors can influence the mechanism of fragmentation of a rock by using expansive cement: hole diameter, hole spacing, panel mesh, expansive pressure applied, and the elastic properties of the massif. Stresses and displacements generated globally decrease when spacing holes increase. Normal stresses allow a better stress interaction between holes in the case of square mesh disposition. Staggered mesh disposition generates higher stresses than the square mesh disposition. But the square mesh disposition can be useful for controlled fragmentation in order to obtain block of rock with square geometry. For each expansive cement and rock, there exist suitable range of diameter and spacing hole which can generate high stresses for breaking the rock.

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