Correction to: A FEA Model to Predict Mechanical Properties of Laminated Bamboo Composites

This study about laminated bamboo strip from gigantochloa levis type mixed with epoxy composite. Due to the existence of demand for products that are comfortable, healthy and environmentally friendly, this research has focused on the use of renewable sources that is bamboo. Bamboos are some of fastest growing plant in the world and also have a higher compressive strength than wood, brick or concrete and a tensile strength that rivals steel. Certain species of bamboo can grow 35 inchies within 24 hour period, at a rate of 3 cm/h. That means bamboos can growth of approximately 1 mm every 2 minutes. In this study, the bamboo strip reinforced with epoxy was processed through hand lay-out method. Bamboo strips are combined with epoxy for a total sample thickness of 3 mm. This study is performed using the impact test that is Charpy (ASTM D-6110) and Izod (ASTM D-256) to measure the mechanical properties of energy absorbtion, followed by hardness test (ASTM D-1037). The 0, 60 and 90 degree of laminated bamboo strip epoxy composite with two types of load 7 kg and 14 kg has been tested. It is found that the 0 degree specimen Charpy test give the best value is 4.79 Joule energy absorbtion for 14 kg load. While for the Izod test, the best composition is also 0 degree with 4.51 Joule energy absorbtion for 14 kg load. It is shown that when the degree of bamboo laminate configuration increases, the impact absorbtion decrease. The result also shown that, when the load is increase the impact also increases. It means that got relative significant between bamboo strip configuration and load. The impact properties relate to the loading weight. The hardness test also shown that the laminated bamboo strip for 14 kg load resulting 91 rating, that is more higher than 7 kg load that is 84. It is shown that more loads will result more hardness rating for the laminated bamboo strip.

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Finite Element Modeling of Pad Deformation due to Diamond Disc Conditioning in Chemical Mechanical Polishing (CMP)

ASME 2012 International Manufacturing Science and Engineering Conference ◽

10.1115/msec2012-7364 ◽

2012 ◽

Author(s):

Emmanuel A. Baisie ◽

Z. C. Li ◽

X. H. Zhang

Keyword(s):

Mechanical Properties ◽

Finite Element ◽

Material Removal ◽

High Performance ◽

Removal Rate ◽

Chemical Mechanical Planarization ◽

Element Analysis ◽

Fea Model ◽

Pad Wear ◽

Diamond Disc

Chemical mechanical planarization (CMP) is widely used to planarize and smooth the surface of semiconductor wafers. In CMP, diamond disc conditioning is traditionally employed to restore pad planarity and surface asperity. Pad deformation which occurs during conditioning affects the material removal mechanism of CMP since pad shape, stress and strain are related to cut rate during conditioning, pad wear rate and wafer material removal rate (MRR) during polishing. Available reports concerning the effect of diamond disc conditioning on pad deformation are based on simplified models of the pad and do not consider its microstructure. In this study, a two-dimensional (2-D) finite element analysis (FEA) model is proposed to analyze the interaction between the diamond disc conditioner and the polishing pad. To enhance modeling fidelity, image processing is utilized to characterize the morphological and mechanical properties of the pad. An FEA model of the characterized pad is developed and utilized to study the effects of process parameters (conditioning pressure and pad stiffness) on pad deformation. The study reveals that understanding the morphological and mechanical properties of CMP pads is important to the design of high performance pads.

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Modeling and Assessment of Porosity Effects on Mechanical Properties of Tissue Scaffolds

Manufacturing Science and Engineering, Parts A and B ◽

10.1115/msec2006-21040 ◽

2006 ◽

Author(s):

W. M. Parks ◽

Y. B. Guo ◽

K. A. Woodbury

Keyword(s):

Mechanical Properties ◽

Finite Element ◽

Mechanical Behavior ◽

Tissue Scaffolds ◽

Materials Testing ◽

Mechanical Behaviors ◽

Fea Model ◽

Pore Architecture ◽

Static Mechanical ◽

Scaffold Architecture

Mechanical properties of scaffolds are important for fabricating engineered tissues. However, localized mechanical properties of scaffold cannot be directly obtained from experiments. This study provides a solid modeling approach to simulate mechanical behaviors of alginate scaffolds with different porosity. A scaffold micro-domain has been modeled as made of sub-units, arranged in a sphere-based pore architecture. An expression to calculate porosity was also derived for the scaffold architecture. Finite element simulations of compressing alginate scaffolds were performed to evaluate the effect of porosity on quasi-static mechanical behavior. The developed FEA model is capable of computing scaffold strength and predicting localized mechanical behavior without destructive materials testing.

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Experimental study on laminated bamboo lumber column

E3S Web of Conferences ◽

10.1051/e3sconf/20183802001 ◽

2018 ◽

Vol 38 ◽

pp. 02001 ◽

Cited By ~ 1

Author(s):

Chenwei Wang ◽

Huizhong Zhang ◽

Chenjie Zhao ◽

Chenge Zhang ◽

Tongwei Cao ◽

...

Keyword(s):

Mechanical Properties ◽

Experimental Study ◽

Tensile Stress ◽

Bearing Capacity ◽

Influencing Factors ◽

Ultimate Load ◽

Eccentric Compression ◽

Laminated Bamboo ◽

Standard Normal ◽

Laminated Bamboo Lumber

This paper presents and discusses the experimental study on the mechanical properties of LBL column both under axial and eccentric compression. The results shows that the ultimate load for the eccentric compression specimens with the eccentricity values of 30 mm and 110 mm are 95.2 kN and 31.8 kN respectively. Eccentricity is one of the main influencing factors for the ultimate bearing capacity of the LBL columns. Because of the vulnerability of the mechanical connections or natural nodes to tensile stress and secondly, laminated bamboo is vulnerable to defects that has more detrimental influence on the tensile resistance of the material. The variation in strain for the laminated bamboo lumber column sections is linear throughout the loading process, following standard normal section bending theory which is similar as that for the beam.

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Studies on Water Sorption Behaviour of Laminated Bamboo Polymer Composite

E3S Web of Conferences ◽

10.1051/e3sconf/201913001040 ◽

2019 ◽

Vol 130 ◽

pp. 01040 ◽

Cited By ~ 1

Author(s):

Yuniar Ratna Pratiwi ◽

Indah Widiastuti ◽

Budi Harjanto

Keyword(s):

Mechanical Properties ◽

Water Absorption ◽

Tensile Properties ◽

Water Immersion ◽

Bamboo Fiber ◽

Epoxy Composites ◽

Gravimetric Analysis ◽

Sorption Behaviour ◽

Laminated Bamboo ◽

The Matrix

The aim of this article is to evaluate water absorption in bamboo fiber composites. Bamboo is hydrophilic, means that it easily absorbs water. In this study the bamboo fiber-based composites were developed using hand lay up method, with epoxy resin as the matrix constituent. Water absorption characteristics of specimens of bamboo composite and epoxy were determined from water immersion tests at several temperatures. Gravimetric analysis was performed to determine the moisure absorbed as a function of time at two different temperatures: 25 ºC and 50 C. The diffusivity of water in an epoxy bamboo composite was determined after reaching saturation point. During room temperature soaking, epoxy specimen showed the characteristic of Fickian behavior. Similar immersion tests on bamboo-epoxy composites followed nonfickian behavior. Changes in the mechanical properties of material due to water absorption were evaluated from tensile testing on materials with varied water content. It was found that the waterabsorption in all samples reduced the tensile properties. The degradation of tensile properties was greater with an increasing temperature of immersion. The results of this study emphasize the importance ofconsidering deterioration of mechanical properties in the bamboo epoxy composites during their application in water and possibly in humid environment.

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