Experimental and Fem Short-Term Tensile Strength Assessment of U- And Sharp v-Notched Specimens Made of Ductile Material

Сапожников, С. Б.; Leshkov, E. V.; Ivanov, Mikhail; Ivanov, M. A.; Yaroslavtsev, S I; Ярославцев, Сергей Иванович; Shcherbakov, I A

doi:10.15593/perm.mech/2018.2.09

Cited by 3 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is related to the fact that due to the physical properties of polymeric materials, which are often used by this technology, when melting their macromolecules are stretched in the direction of flow, resulting in objects printed by the FFF method being characterized by anisotropy [5][6][7][8]. Test data comparison of samples printed from the most common acrylonitrile butadiene styrene (ABS) and polylactide (PLA) plastics with the results of samples being made, for example, with a screw extruder [9], does not speak in favor of 3D printing, if the load is applied not along, but across, the layers.…”

Section: Introductionmentioning

confidence: 99%

Strength Increasing Additive Manufacturing Fused Filament Fabrication Technology, Based on Spiral Toolpath Material Deposition

et al. 2019

View full text Add to dashboard Cite

The paper provides an overview of ways to increase the strength of polymer products obtained by fused filament fabrication (FFF) technology. An algorithm for calculating the spiral toolpaths for the material deposition using multi-axis printing is proposed. The design of the five-axis device for spiral-shaped deposition of the material is shown. The description of the proposed printing method is given. The results of comparative three-point bend and compression tests are presented. The standard samples obtained in the usual way by FFF technology, as well as samples with 2, 4, 6, 8 and 10 reinforcing layers obtained by spiral deposition of the material were investigated. The description of the tests is given, the dependences of the strength of the products on the number of reinforcing layers are obtained. Conclusions about the influence of the layer deposition method on the strength of the products are formulated.

show abstract

Section: Introductionmentioning

confidence: 99%

Strength Increasing Additive Manufacturing Fused Filament Fabrication Technology, Based on Spiral Toolpath Material Deposition

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Nowadays, excisions in solid bodies are usually treated proceeding from model representations of V-and U-shaped configurations [1][2][3][4][5][6][7][8][9][10][11][12][13]. Singular solutions are true for classical V-notches, whereas in rounded U-notches respective measurable curvature radii are responsible for concentrated stresses.…”

Section: Introductionmentioning

confidence: 99%

A Body Failure Model With a Notch Based on the Scalable Linear Parameter

2018

PNRPU MB

View full text Add to dashboard Cite

Berto F., Glagolev V.V., Markin A.A. A Body Failure Model with a Notch Based on the Scalable Linear Parameter // Вестник Пермского национального исследовательского политехнического университета. Механика.Based on the concept of the interactive layer (IL), the paper considers the deformation of a body with a thin deep notch in a linearly elastic formulation. The stress state in the interactive layer is determined on the basis of the constitutive relations of the Prandtl bonds type. The proposed formulation of the task explicitly includes a linear parameter (LP). Based on the analytical solution of the task in the beam approximation, the dependence of the wedge force on the thickness (IL) is obtained. The use of the classical strength criteria in this dependence leads to a zero critical force at zero thickness IL, which contradicts the Griffith-Irvin criterion. We use it as a universal criterion for the destruction of the energy product (EP), as a product of a linear size and an increase in the specific free energy of the layer is shown. A relationship is established between the dimensions of the sample and the critical force, which ensures independence with a given degree of accuracy of the critical force from the thickness IL. By comparing the solution obtained and the classical solution for the notch in the form of a mathematical cut, the assumptions under which EP criterion and the Griffith's criterion (GC) coincide are determined. By using the Neuber-Novozhilov approach, the structural volume of the material with averaged characteristics of the stress-strain state (SSS) is identified. This volume is considered as a representative volume for determining the increment of еру average free energy that controls the state of pre-destruction. The product of the increment of the average free energy and LP determines the average EP. The expression for the average EP is determined on the basis of the obtained analytical solution. It is shown that the transition to the averaged value of the EP on a square Neuber cell does not lead to an increase in the margin of error in determining the critical force. It has been established that starting with a certain value of LP, which depends on the geometric characteristics of the damaged body, the convergence of the average EP in the pre-destruction zone to the GC takes place with a specified degree of accuracy. © PNRPU Keywords:quasi-brittle failure, linear size, pre-failure zone, energy product.

show abstract

Protection of Aircraft Lattice Shell Made of UD CFRP Ribs from Low-Velocity Impacts

Kondakov¹,

Чернов²,

Shanygin³

et al. 2022

Mech Compos Mater

View full text Add to dashboard Cite

Experimental and Fem Short-Term Tensile Strength Assessment of U- And Sharp v-Notched Specimens Made of Ductile Material

Cited by 3 publications

References 19 publications

Strength Increasing Additive Manufacturing Fused Filament Fabrication Technology, Based on Spiral Toolpath Material Deposition

Strength Increasing Additive Manufacturing Fused Filament Fabrication Technology, Based on Spiral Toolpath Material Deposition

A Body Failure Model With a Notch Based on the Scalable Linear Parameter

Protection of Aircraft Lattice Shell Made of UD CFRP Ribs from Low-Velocity Impacts

Contact Info

Product

Resources

About