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Online since: March 2009
Authors: Gergana Nikolova, Jordanka Ivanova
Lemaitre et al
The crack singularities at bi-material interfaces were analysed by Cook and Erdogan [2], Rizk and Erdogan [3], Hutchinson and Suo [4], Song et al. [5].
Limit value of combined loading cε for the elastic - slip interface model For , f cr el L τ τ= = the limit value of cε is equal to 0 0.016 c A T ε ε α= − ∆ = .
The behaviour of the length of debonding zone el (non-dimensional) from loading (nondimensional) is illustrated at the given bellow figure: (a) (b) Fig.2 Dependence of length of debonding zone el from (a) mechanical and (b) combined loading Figure 2 shows the influence of the tension load 0ε and combined loading c ε on the length of debonding el .
For plates with elastic-plastic-cohesion behaviour of the interface the value is 79.4=el (see Eq. (6) and [7, 8]).
The crack singularities at bi-material interfaces were analysed by Cook and Erdogan [2], Rizk and Erdogan [3], Hutchinson and Suo [4], Song et al. [5].
Limit value of combined loading cε for the elastic - slip interface model For , f cr el L τ τ= = the limit value of cε is equal to 0 0.016 c A T ε ε α= − ∆ = .
The behaviour of the length of debonding zone el (non-dimensional) from loading (nondimensional) is illustrated at the given bellow figure: (a) (b) Fig.2 Dependence of length of debonding zone el from (a) mechanical and (b) combined loading Figure 2 shows the influence of the tension load 0ε and combined loading c ε on the length of debonding el .
For plates with elastic-plastic-cohesion behaviour of the interface the value is 79.4=el (see Eq. (6) and [7, 8]).
Online since: January 2022
Authors: Alexandra Bourdot, Chady El Hachem, Maroua Maaroufi, Kamilia Abahri
These materials are well known for their hygrothermal and acoustic insulation performances, their resistance to fire and heat and most importantly their environmental and energy performance (Väisänen et al., 2017, Akadiri et al., 2012).
However, it is a hygroscopic material that tends to swell or shrink with humidity (Žlahtič et al., 2018).
A non-hysteresis model is also used in the numerical computations in order to evaluate the influence of sorption hysteresis phenomenon on the moisture transfers. 2 MATERIALS AND METHODS The material of interest in this paper is a spruce wood presented in a previous study (El hachem et al., 2020).
This model was validated by comparison of numerical and experimental results in a previous work (Maaroufi et al., 2021).
Construction and Building Materials 160. https://doi.org/10.1016/j.conbuildmat.2017.11.096 [7] El Hachem, C., Abahri, K., Leclerc, S., Bennacer, R., 2020.
However, it is a hygroscopic material that tends to swell or shrink with humidity (Žlahtič et al., 2018).
A non-hysteresis model is also used in the numerical computations in order to evaluate the influence of sorption hysteresis phenomenon on the moisture transfers. 2 MATERIALS AND METHODS The material of interest in this paper is a spruce wood presented in a previous study (El hachem et al., 2020).
This model was validated by comparison of numerical and experimental results in a previous work (Maaroufi et al., 2021).
Construction and Building Materials 160. https://doi.org/10.1016/j.conbuildmat.2017.11.096 [7] El Hachem, C., Abahri, K., Leclerc, S., Bennacer, R., 2020.
Online since: December 2010
Authors: Guo Liang Bai, Shu Yun Zhang, Lai Shun Zhao
Three seismic waves are from EL-Centro earthquake, Taft earthquake and simulative ground motion in site class of Ⅱ, the characteristic period of ground motion is 0.35 s, the design basic acceleration of ground motion is 0.20g, the seismic fortification intensity is 8 degrees, waves were adjusted in the light of correspondence principle between acceleration peak of ground motion and acceleration peak of seismic wave in frequent earthquakes[9], seismic waves were input along the weak axis.
(a) Response to EL-Centro earthquake (b) Response to Taft earthquake (c) Response to simulative ground motion Fig. 5 The top displacement Time-history curve The top displacement-time history curves under different connection type are given in Fig. 5, the responses for hinged model to three seismic waves lag behind those of rigid model, that reflects the differences in stiffness for connection type.
Table 5 Contrast of inner force in exterior frame under frequent earthquake Floor Hinged model Rigid model Hinged model Rigid model EL Taft II EL Taft II EL Taft II EL Taft II 30 14.8% 13.3% 11.4% 11.1% 11.1% 8.7% 1.5% 1.5% 1.2% 1.3% 1.1% 1.0% 27 14.4% 13.2% 11.2% 11.5% 11.6% 9.0% 6.1% 6.0% 4.8% 6.0% 5.2% 4.7% 24 16.4% 14.8% 12.8% 13.4% 13.5% 10.7% 11.3% 11.0% 8.8% 11.4% 10.0% 9.1% 21 17.7% 15.4% 14.1% 14.7% 14.6% 12.3% 16.9% 16.4% 13.3% 17.5% 15.2% 14.0% 18 18.0% 15.3% 14.7% 15.3% 15.0% 13.5% 22.7% 21.7% 18.0% 23.8% 20.5% 19.4% 15 17.2% 14.8% 14.3% 15.0% 15.9% 13.7% 28.4% 26.5% 22.6% 30.1% 25.5% 25.1% 12 15.0% 13.8% 13.8% 13.4% 16.8% 12.5% 33.5% 30.5% 26.8% 35.9% 29.9% 30.4% 9 12.1% 13.3% 12.7% 11.2% 15.5% 11.4% 37.6% 33.8% 30.1% 40.7% 33.5% 35.0% 6 12.4% 13.3% 12.5% 11.8% 14.9% 11.6% 40.9% 36.8% 32.7% 44.8% 36.3% 38.8% 3 15.7% 16.4% 15.6% 15.1% 17.4% 14.8% 43.5% 39.1% 35.1% 47.9% 39.4% 41.6% 1 5.5% 5.5% 5.9% 5.3% 5.4% 5.8% 44.4% 39.9% 36.2% 48.8% 40.8% 42.4% Note:is the extremes
References [1] Peifu Xu, Cuikun Wang, Congzhen Xiao: Building structure, Vol. 39 (9) ( 2009), p. 28 (in Chinese) [2] Zuyan Shen, Donghui Wen, Yuanqi Li: Building structure, Vol. 39 (9) ( 2009), p. 15 (in Chinese) [3] Pei-fu XU, Xue-yi Fu, Cui-kong WANG, et al: The Architecture Structure Design of Complex Tall Buildings (China Architecture and Building Press, Beijing 2005) (in Chinese) [4] Bahram M.
Shahrooz, Bingnian Gong, Gokhan Tunc,et al: Progress in Structural Engineering and Materials, Vol. 3(2) ( 2001), p. 149 [5] Peifu XU, Yantao XUE, cong-zhen XIAO, et al: Building Structure, Vol. 35(5) ( 2005), p. 3 (in Chinese) [6] Xilin Lü, Yun Zou, Wensheng Lu , et al: Earthquake Engineering and Engineering Vibration, Vol. 24 (3)( 2004), p. 57(in Chinese) [7] Xia-sa Studio.
(a) Response to EL-Centro earthquake (b) Response to Taft earthquake (c) Response to simulative ground motion Fig. 5 The top displacement Time-history curve The top displacement-time history curves under different connection type are given in Fig. 5, the responses for hinged model to three seismic waves lag behind those of rigid model, that reflects the differences in stiffness for connection type.
Table 5 Contrast of inner force in exterior frame under frequent earthquake Floor Hinged model Rigid model Hinged model Rigid model EL Taft II EL Taft II EL Taft II EL Taft II 30 14.8% 13.3% 11.4% 11.1% 11.1% 8.7% 1.5% 1.5% 1.2% 1.3% 1.1% 1.0% 27 14.4% 13.2% 11.2% 11.5% 11.6% 9.0% 6.1% 6.0% 4.8% 6.0% 5.2% 4.7% 24 16.4% 14.8% 12.8% 13.4% 13.5% 10.7% 11.3% 11.0% 8.8% 11.4% 10.0% 9.1% 21 17.7% 15.4% 14.1% 14.7% 14.6% 12.3% 16.9% 16.4% 13.3% 17.5% 15.2% 14.0% 18 18.0% 15.3% 14.7% 15.3% 15.0% 13.5% 22.7% 21.7% 18.0% 23.8% 20.5% 19.4% 15 17.2% 14.8% 14.3% 15.0% 15.9% 13.7% 28.4% 26.5% 22.6% 30.1% 25.5% 25.1% 12 15.0% 13.8% 13.8% 13.4% 16.8% 12.5% 33.5% 30.5% 26.8% 35.9% 29.9% 30.4% 9 12.1% 13.3% 12.7% 11.2% 15.5% 11.4% 37.6% 33.8% 30.1% 40.7% 33.5% 35.0% 6 12.4% 13.3% 12.5% 11.8% 14.9% 11.6% 40.9% 36.8% 32.7% 44.8% 36.3% 38.8% 3 15.7% 16.4% 15.6% 15.1% 17.4% 14.8% 43.5% 39.1% 35.1% 47.9% 39.4% 41.6% 1 5.5% 5.5% 5.9% 5.3% 5.4% 5.8% 44.4% 39.9% 36.2% 48.8% 40.8% 42.4% Note:is the extremes
References [1] Peifu Xu, Cuikun Wang, Congzhen Xiao: Building structure, Vol. 39 (9) ( 2009), p. 28 (in Chinese) [2] Zuyan Shen, Donghui Wen, Yuanqi Li: Building structure, Vol. 39 (9) ( 2009), p. 15 (in Chinese) [3] Pei-fu XU, Xue-yi Fu, Cui-kong WANG, et al: The Architecture Structure Design of Complex Tall Buildings (China Architecture and Building Press, Beijing 2005) (in Chinese) [4] Bahram M.
Shahrooz, Bingnian Gong, Gokhan Tunc,et al: Progress in Structural Engineering and Materials, Vol. 3(2) ( 2001), p. 149 [5] Peifu XU, Yantao XUE, cong-zhen XIAO, et al: Building Structure, Vol. 35(5) ( 2005), p. 3 (in Chinese) [6] Xilin Lü, Yun Zou, Wensheng Lu , et al: Earthquake Engineering and Engineering Vibration, Vol. 24 (3)( 2004), p. 57(in Chinese) [7] Xia-sa Studio.
Online since: February 2013
Authors: Mazen Al-Ghoul, Janane Rahbani
Fluorescence Study of Ionic Intercalation/De-intercalation in the Reaction-Diffusion Mediated Polymorphic Transition of a Class of Nanolayered Material
Janane Rahbani1, a, Mazen Al-Ghoul1, b
1Department of Chemistry, American University of Beirut, P.O.Box 11-0236, Riad El-Solh 1107 2020, Beirut, Lebanon
ajfr03@aub.edu.lb, bmazen.ghoul@aub.edu.lb
Keywords: nanolyered materials, Ostwald ripening, phase conversion, reaction-diffusion
Abstract.
El-Batlouni, H.
El-Rassy and M.
Al-Ghoul: The Journal of Physical Chemistry A Vol. 112 (2008), p. 7755-7757
El-Batlouni, H.
El-Rassy and M.
Al-Ghoul: The Journal of Physical Chemistry A Vol. 112 (2008), p. 7755-7757
Online since: August 2015
Authors: V. Sivakumar, E. Ganapathy Sundaram, B. Sakthikiran, T. Sanjay Krishnan, A. Riyaz Hussain
El-Sebaii et al. [2] designed and fabricated a single slope single basin solar still with aluminum movable baffle suspended absorber plate.
A thermal analysis of solar desalination was developed by Tiwari et al. [4] to optimize the inclination of the glass cover for maximum yield.
El-Samadony and Kabeel [5] theoretically estimated that the presence of glass cover cooling may increase the stepped solar still productivity by about 8.2 %.
[2] A.A.El-Sebaii, S.Aboul-Enein, E.El-Bialy, Single basin solar still with baffle suspended absorber, Energy Conversion and Management.
El-Samadony, A.E.
A thermal analysis of solar desalination was developed by Tiwari et al. [4] to optimize the inclination of the glass cover for maximum yield.
El-Samadony and Kabeel [5] theoretically estimated that the presence of glass cover cooling may increase the stepped solar still productivity by about 8.2 %.
[2] A.A.El-Sebaii, S.Aboul-Enein, E.El-Bialy, Single basin solar still with baffle suspended absorber, Energy Conversion and Management.
El-Samadony, A.E.
Online since: August 2021
Authors: Marwa F. El Kady, Ahmed H. El-Shazly, Omneya A. Koriem
El-Shazly1,2,b and Marwa F.
El-Shazly, “Metal organic framework based polymer mixed matrix membranes: Review on applications in water purification,” Membranes (Basel)., vol. 9, no. 7, 2019
Wiersum et al., “An evaluation of UiO-66 for gas-based applications,” Chem. - An Asian J., vol. 6, no. 12, pp. 3270–3280, 2011
Užarević et al., “Mechanochemical and solvent-free assembly of zirconium-based metal-organic frameworks,” Chem.
Katz et al., “A facile synthesis of UiO-66, UiO-67 and their derivatives,” Chem.
El-Shazly, “Metal organic framework based polymer mixed matrix membranes: Review on applications in water purification,” Membranes (Basel)., vol. 9, no. 7, 2019
Wiersum et al., “An evaluation of UiO-66 for gas-based applications,” Chem. - An Asian J., vol. 6, no. 12, pp. 3270–3280, 2011
Užarević et al., “Mechanochemical and solvent-free assembly of zirconium-based metal-organic frameworks,” Chem.
Katz et al., “A facile synthesis of UiO-66, UiO-67 and their derivatives,” Chem.
Online since: November 2011
Authors: Wei Cao, Wen Juan Wang, Rui Wang
The dividing space distance (DS) was calculated as Eq. 2, Cl is defined as the maximum value of the residuals and CS is defined as the minimum value of the residuals,
DS= (CL-CS) / 5=0.1526 (2)
Then the state space was divided into five states, which is showed in Table 1,
Table 1, State Space Division
state space
EL
ES
S1
EL(1)= CL
ES(1)= CL -DS
S2
EL(2)= CL - DS
ES(2)= CL -3* DS
S3
EL(3)= CL -3* DS
ES(3)= CL -3.6* DS
S4
EL(4)= CL -3.6*DS
ES(4)= CL -3.7* DS
S5
EL(5)= CL -3.7* DS
ES(5)= CL -5* DS
The division of the state space depends on the people’s experience, which affects prediction accuracy.
Wu, et al, Wear Characterization by On-Line Ferrograph Image.
Wu, et al, Wear Characterization by On-Line Ferrograph Image.