Comparison of newly proposed test methods to evaluate the bonding quality of Cross-Laminated Timber (CLT) panels by means of experimental data and finite element (FE) analysis

Shape Memory Alloys (SMA) are promising materials for actuation in space applications, because of the relatively large deformations and forces that they offer. However, their complex behaviour and interaction of several physical domains (electrical, thermal and mechanical), the study of SMA behaviour is a challenging field. Present work aims at correlating the Finite Element (FE) analysis of SMA with closed form solutions and experimental data. Though sufficient literature is available on closed form solution of SMA, not much detail is available on the Finite element Analysis. In the present work an attempt is made for characterization of SMA through solving the governing equations by established closed form solution, and finally correlating FE results with these data. Extensive experiments were conducted on 0.3mm diameter NiTinol SMA wire at various temperatures and stress conditions and these results were compared with FE analysis conducted using MSC.Marc. A comparison of results from finite element analysis with the experimental data exhibits fairly good agreement.

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The Investigation of the Effect Caused by Deposition Velocity on Bonding Degree within the Structure of FDM

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.764.142 ◽

2018 ◽

Vol 764 ◽

pp. 142-155 ◽

Cited By ~ 1

Author(s):

Jie Li ◽

Hong Bin Li ◽

Jing Chuan Dong ◽

Tai Yong Wang ◽

Hai Tao Zhang

Keyword(s):

Finite Element ◽

Deposition Velocity ◽

Quantitative Relationship ◽

Optimal Temperature ◽

Bonding Quality ◽

Building Process ◽

First Time ◽

Area Deposition ◽

Printing Method

In this paper, the effect of deposition velocity on bonding degree is studied in the aspects of experiment and theory. The experimental results show that the bonding quality of the adjacent filaments is weakened with increasing of deposition velocity. In addition, on the premise of guaranteeing every point in the building process to remain at the optimal temperature, the quantitative relationships between interval and filled area, deposition velocity are investigated by using the technique of deactivate and reactivate element of finite element. On the base of the quantitative relationships, the variable deposition velocity printing method is proposed for the first time. Namely, to reap the best bonding quality of filaments the time of completing one layer can be determined according to the filled area, and then, the optimal deposition velocity can be obtained according to the quantitative relationship between the interval and the deposition velocity. Printing the model at this speed can obtain the part with the best bonding quality between adjacent layers.

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Prediction of Temperature Distribution during Curing Thick Thermoset Composite Laminates

Materials Science Forum ◽

10.4028/www.scientific.net/msf.544-545.427 ◽

2007 ◽

Vol 544-545 ◽

pp. 427-430 ◽

Cited By ~ 2

Author(s):

Je Hoon Oh

Keyword(s):

Heat Transfer ◽

Experimental Data ◽

Finite Element ◽

Temperature Distribution ◽

Composite Laminates ◽

Fe Analysis ◽

Curing Process ◽

Thermoset Composites ◽

Simulated Temperature ◽

Laminate Thickness

A 3-D transient heat transfer finite element (FE) analysis was performed to simulate the curing process of thick thermoset composites. The simulated temperature was compared with the available experimental data to check the validity of the analysis. The influence of thickness of composite laminates on the temperature distribution was investigated, and how the size of laminates affects the inside temperature was also discussed. The results indicate that the laminate thickness rather than the laminate size has a significant influence on temperature distribution, and the 3-D analysis offers more accurate predictions than the 1-D analysis.

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A comprehensive nonlinear finite element modelling and parametric analysis of reinforced concrete beams

World Journal of Engineering ◽

10.1108/wje-04-2021-0212 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Pandimani Pandimani ◽

Markandeya Raju Ponnada ◽

Yesuratnam Geddada

Keyword(s):

Experimental Data ◽

Finite Element ◽

Reinforced Concrete ◽

Ultimate Load ◽

Fe Analysis ◽

Fe Model ◽

Rc Beams ◽

Content Type ◽

Bond Slip ◽

Slip Mechanism

Purpose This study aims to present comprehensive nonlinear material modelling techniques and simulations of reinforced concrete (RC) beams subjected to short-term monotonic static load using the robust and reliable general-purpose finite element (FE) software ANSYS. A parametric study is carried out to analyse the flexural and ductility behaviour of RC beams under various influencing parameters. Design/methodology/approach To develop and validate the numerical FE models, a total of four experimentally tested simply supported RC beams are taken from the available literature and two beams are selected from each author. The concrete, steel reinforcements, bond-slip mechanism, loading and supporting plates are modelled using SOLID65, LINK180, COMBIN39 and SOLID185 elements, respectively. The validated models are then used to conduct parametric FE analysis to investigate the effect of concrete compressive strength, percentage of tensile reinforcement, compression reinforcement ratio, transverse shear reinforcement, bond-slip mechanism, concrete compressive stress-strain constitutive models, beam symmetry and varying overall depth of beam on the ultimate load-carrying capacity and ductility behaviour of RC beams. Findings The developed three-dimensional FE models can able to capture the load and midspan deflections at critical points, the accurate yield point of steel reinforcements, the formation of initial and progressive concrete crack patterns and the complete load-deflection curves of RC beams up to ultimate failure. From the numerical results, it can be concluded that the FE model considering the bond-slip effect with Thorenfeldt’s concrete compressive stress-strain model exhibits a better correlation with the experimental data. Originality/value The ultimate load and deflection results of validated FE models show a maximum deviation of less than 10% and 15%, respectively, as compared to the experimental results. The developed model is also capable of capturing concrete failure modes accurately. Overall, the FE analysis results were found quite acceptable and compared well with the experimental data at all loading stages. It is suggested that the proposed FE model is a practical and reliable tool for analyzing the flexural behaviour of RC members and can be used for performing parametric studies.

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Calibration of the ISO tapping machine for finite-element prediction tool on a wooden-base floor

Building Acoustics ◽

10.1177/1351010x19855227 ◽

2019 ◽

Vol 26 (3) ◽

pp. 157-167 ◽

Cited By ~ 2

Author(s):

Cheng Qian ◽

Sylvain Ménard ◽

Delphine Bard-Hagberg ◽

Jean-Luc Kouyoumji ◽

Juan Negreira

Keyword(s):

Finite Element ◽

Dynamic Properties ◽

Low Frequency ◽

Experimental Tests ◽

Cross Laminated Timber ◽

Acoustic Insulation ◽

Impact Noise ◽

Important Challenge ◽

The Impact

One important challenge of the wooden constructions is to achieve a high quality of acoustic insulation, especially decreasing the impact noise in the low-frequency range. In order to avoid over-designed solutions and expensive experimental tests in the design phase, reliable prediction tools are called for. This article is an initial investigation of modeling the ISO standardized tapping machine on a cross-laminated timber floor, using finite element method. The wooden-based floor was first calibrated in terms of its dynamic properties. The influence of the material properties of the cross-laminated timber floor was discussed. The force generated by the tapping machine was then introduced in the established cross-laminated timber model. The model was finally validated by comparing the simulation results with the measured accelerations.

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Development of Novel Test Specimens for Characterization of Multi-Material Parts Manufactured by Material Extrusion

Applied Sciences ◽

10.3390/app8081220 ◽

2018 ◽

Vol 8 (8) ◽

pp. 1220 ◽

Cited By ~ 6

Author(s):

Hagen Watschke ◽

Lennart Waalkes ◽

Christian Schumacher ◽

Thomas Vietor

Keyword(s):

Standardized Test ◽

Functional Integration ◽

Polymeric Materials ◽

Test Methods ◽

Fracture Pattern ◽

Bonding Quality ◽

Material Extrusion ◽

Lap Shear

Multi-material additive manufacturing (AM) offers new design opportunities for functional integration and opens new possibilities in innovative part design, for example, regarding the integration of damping or conductive structures. However, there are no standardized test methods, and thus test specimens that provide information about the bonding quality of two materials printed together. As a result, a consideration of these new design potentials in conceptual design is hardly possible. As material extrusion (ME) allows easily combination of multiple polymeric materials in one part, it is chosen as an AM technique for this contribution. Based on a literature review of commonly used standards for polymer testing, novel test specimens are developed for the characterization of the bonding quality of two ME standard materials printed together. The proposed specimen geometries are manufactured without a variation of process parameters. The load types investigated in the course of this study were selected as examples and are tensile, lap-shear, and compression-shear. The conducted tests show that the proposed test specimens enable a quantification of the bonding quality in the material transition. Moreover, by analyzing the fracture pattern of the interface zone, influencing factors that probably affect the interface strength are identified, which can be further used for its optimization.

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Bonding quality of industrially produced cross-laminated timber (CLT) as determined in delamination tests

Construction and Building Materials ◽

10.1016/j.conbuildmat.2016.12.057 ◽

2017 ◽

Vol 133 ◽

pp. 219-225 ◽

Cited By ~ 4

Author(s):

Markus Knorz ◽

Stefan Torno ◽

Jan-Willem van de Kuilen

Keyword(s):

Bonding Quality ◽

Cross Laminated Timber

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Towards Predicting Relative Belt Edge Endurance With the Finite Element Method

Tire Science and Technology ◽

10.2346/1.2141701 ◽

1990 ◽

Vol 18 (4) ◽

pp. 216-235 ◽

Cited By ~ 19

Author(s):

J. De Eskinazi ◽

K. Ishihara ◽

H. Volk ◽

T. C. Warholic

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Three Dimensional ◽

The Finite Element Method ◽

Shear Deformations ◽

Element Analysis ◽

Vertical Loading ◽

Predicted Values ◽

Element Method

Abstract The paper describes the intention of the authors to determine whether it is possible to predict relative belt edge endurance for radial passenger car tires using the finite element method. Three groups of tires with different belt edge configurations were tested on a fleet test in an attempt to validate predictions from the finite element results. A two-dimensional, axisymmetric finite element analysis was first used to determine if the results from such an analysis, with emphasis on the shear deformations between the belts, could be used to predict a relative ranking for belt edge endurance. It is shown that such an analysis can lead to erroneous conclusions. A three-dimensional analysis in which tires are modeled under free rotation and static vertical loading was performed next. This approach resulted in an improvement in the quality of the correlations. The differences in the predicted values of various stress analysis parameters for the three belt edge configurations are studied and their implication on predicting belt edge endurance is discussed.

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Орошение томата F1 Донской в открытом грунте Московской области

Kartofel` i ovoshi ◽

10.25630/pav.2019.29.90.002 ◽

2019 ◽

Author(s):

D.I. Engalychev ◽

N.A. Engalycheva ◽

A.M. Menshikh

Keyword(s):

Experimental Data ◽

Agricultural Technology ◽

Tomato Fruits ◽

River Floodplain ◽

Yield And Quality ◽

Open Ground ◽

Alluvial Meadow ◽

Standard Production ◽

Moscow River

Представлены экспериментальные данные о влиянии капельного орошения на урожайность и качество плодов томата при выращивании культуры в открытом грунте Московской области. На плодородных аллювиальных луговых почвах Москворецкой поймы при соблюдении агротехники без орошения в среднем за три года исследований в полевых условиях получена урожайность томата F1 Донской 31,9 т/га, с орошением 48,5 т/га, в т.ч. стандартной продукции 42,6 т/га.The article presents experimental data on the effect of drip irrigation on the yield and quality of tomato fruits when growing crops in open ground of the Moscow Region. On fertile alluvial meadow soils of the Moscow river floodplain, with the observance of agricultural technology without irrigation, the field yield of tomato hybrid F1 Donskoi on average for three years of research was 31.9 t/ha, with irrigation 48.5 t/ha, incl. standard production 42.6 t/ha.

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