Micromechanical models for predicting the mechanical properties of 3D-printed wood/PLA composite materials: A comparison with experimental data

2021 ◽  
pp. 1-13
Author(s):  
Ismail Ezzaraa ◽  
Nadir Ayrilmis ◽  
Manja Kitek Kuzman ◽  
Soufiane Belhouideg ◽  
Jamaa Bengourram
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Composite Materials ◽  
3D Printed ◽  
Micromechanical Models ◽  
Comparison With Experimental Data

Mechanical Properties of 3D-Printed Wood-Plastic Composites

2018 ◽  
Vol 777 ◽  
pp. 499-507 ◽  
Author(s):  
Ossi Martikka ◽  
Timo Kärki ◽  
Qing Ling Wu
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
3D Printing ◽  
Impact Strength ◽  
Polylactic Acid ◽  
Wood Plastic Composite ◽  
Wood Plastic Composites ◽  
Plastic Composite ◽  
Plastic Composites ◽  
3D Printed

3D printing has rapidly become popular in both industry and private use. Especially fused deposition modeling has increased its popularity due to its relatively low cost. The purpose of this study is to increase knowledge in the mechanical properties of parts made of wood-plastic composite materials by using 3D printing. The tensile properties and impact strength of two 3D-printed commercial wood-plastic composite materials are studied and compared to those made of pure polylactic acid. Relative to weight –mechanical properties and the effect of the amount of fill on the properties are also determined. The results indicate that parts made of wood-plastic composites have notably lower tensile strength and impact strength that those made of pure polylactic acid. The mechanical properties can be considered sufficient for low-stress applications, such as visualization of prototypes and models or decorative items.

scholarly journals Property Analysis of Photo-Polymerization-Type 3D-Printed Structures Based on Multi-Composite Materials

2021 ◽  
Vol 11 (18) ◽  
pp. 8545
Author(s):  
So-Ree Hwang ◽  
Min-Soo Park
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Composite Materials ◽  
3D Printing ◽  
Bending Test ◽  
3D Printer ◽  
Complex Structures ◽  
Photo Polymerization ◽  
Anisotropic Structures ◽  
3D Printed

Additive manufacturing, commonly called 3D printing, has been studied extensively because it can be used to fabricate complex structures; however, polymer-based 3D printing has limitations in terms of implementing certain functionalities, so it is limited in the production of conceptual prototypes. As such, polymer-based composites and multi-material 3D printing are being studied as alternatives. In this study, a DLP 3D printer capable of printing multiple composite materials was fabricated using a movable separator and structures with various properties were fabricated by selectively printing two composite materials. After the specimen was fabricated based on the ASTM, the basic mechanical properties of the structure were compared through a 3-point bending test and a ball rebound test. Through this, it was shown that structures with various mechanical properties can be fabricated using the proposed movable-separator-based DLP process. In addition, it was shown that this process can be used to fabricate anisotropic structures, whose properties vary depending on the direction of the force applied to the structure. By fabricating multi-joint grippers with varying levels of flexibility, it was shown that the proposed process can be applied in the fabrication of soft robots as well.

Evaluating the Mechanical Properties of 3D Woven Carbon-Epoxy Composite Materials Using Experimental Data and FEA Methods

2011 ◽  
Author(s):  
Mahdi Farahikia ◽  
Sunilbhai Macwan ◽  
Fereidoon Delfanian ◽  
Zhong Hu
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Composite Materials ◽  
Epoxy Composite ◽  
External Pressure ◽  
Fiber Direction ◽  
Strain Gages ◽  
Element Analysis ◽  
Test Specifications ◽  
Dog Bone

A series of tensile, compression and shear tests were carried out on carbon-epoxy composite materials to evaluate their mechanical properties. The experiments were set upin accordance with ASTM standards that best corresponded to the test specifications. Specimens were categorized into groups according to their dimensions and shape. Based on testing requirements, some were cut into rectangular and others into dog bone specimens to determine the effects of stress concentration. A number of specimens were reinforced at both ends by means of tabs which were bonded on both faces to reduce the effects of the external pressure exerted on them through the grips of the testing machines, and the rest of them were tested without any reinforcement tabs. All the specimens were tested until failure. Load, elongation (displacement) and strain data were recorded by means of strain gages and data acquisition systems. The experimental results obtained from similar tests on different groups are compared to examine the conformity of the results regardless of dimension and geometry, and are also verified by Finite Element Analysis (FEA). In addition, FEA is used to study different conditions, such as geometry, that could affect the final results. The experimental data are analyzed and effects of fiber direction on failure method are studied. It was concluded that shape and geometry factors as well as fiber direction influenced the failure method. The work, however, is still in progress and tests under conditions, such as elevated temperature, will be conducted to study other effects on the mechanical properties of 3D woven carbon-epoxy composites.

The Effect of Clay/Epoxy Debonding to the Mechanical Properties of Nanocomposites

2009 ◽  
Author(s):  
J. Y. Park ◽  
T. A. Fay
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Analytical Model ◽  
Continuum Mechanics ◽  
Experimental Program ◽  
Epoxy Nanocomposite ◽  
Micromechanical Approach ◽  
Modeling Techniques ◽  
The Matrix ◽  
Micromechanical Models

Analytical equations using micro- and continuum mechanics approach that can effectively estimate the mechanical properties of polymer composite materials containing clay nanoparticle fillers were developed. Various modeling techniques using the micromechanical approach were investigated, including conventional micromechanical models. An analytical model was proposed based on the consideration of the effects of imperfect bonding between the nanoparticles and the matrix in the composite materials. The mechanical properties of the considered nanocomposites were estimated, and the estimated values were validated using the experimentally determined mechanical properties. For the experimental program, clay/epoxy nanocomposite specimen were fabricated and tested. The developed model was also compared with the conventional and previously developed micromechanical models.

An elastic-plastic indentation model and its solutions

1996 ◽  
Vol 11 (9) ◽  
pp. 2358-2367 ◽  
Author(s):  
Weiping Yu ◽  
James P. Blanchard
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Elastic Modulus ◽  
Yield Stress ◽  
Material Properties ◽  
Hardness Test ◽  
Plastic Materials ◽  
Indentation Tests ◽  
Plastic Indentation ◽  
Comparison With Experimental Data

An analytical model of hardness has been developed. Four major indentation tests, namely indentation by cones, wedges, spheres, and flat-ended, axisymmetric cylinders have been analyzed based on the model. Analytical relationships among hardness, yield stress, elastic modulus, Poisson's ratio, and indenter geometries have been found. These results enable hardness to be calculated in terms of uniaxial material properties and indenter geometries for a wide variety of elastic and plastic materials. These relationships can also be used for evaluating other mechanical properties through hardness measurements and for converting hardness from one type of hardness test into those of a different test. Comparison with experimental data and numerical calculations is excellent.

Aging of polymer composite materials under loading. (See Beginning in #10-2020)

2020 ◽  
pp. 2-12
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Polymer Composite ◽  
Polymer Composite Materials ◽  
Cyclic Loads ◽  
Reinforced Plastics ◽  
Water Exposure ◽  
Laboratory Conditions ◽  
Bending Loads ◽  
Moisture Conditions

A study review of aging polymer composite materials (PCM) under different heat-moisture conditions or water exposure with the sequential or parallel influence of static or cyclic loads in laboratory conditions is presented. The influence of tension and bending loads is compared. Conditions of the different load influence on parameters of carbon-reinforced plastics and glass-reinforced plastics are discussed. Equipment and units for climatic tests of PCM under loading are described. Simulation examples of indices of mechanical properties of PCM under the influence of environment and loads are shown.

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