The in-plane tensile behaviors of bi-axial warp-knitted(BWK) composites under quasi-static and high strain rates loading were experimentally analyzed in this article. The tensile tests were conducted along warp direct...The in-plane tensile behaviors of bi-axial warp-knitted(BWK) composites under quasi-static and high strain rates loading were experimentally analyzed in this article. The tensile tests were conducted along warp direction( 0°) and weft direction( 90°) at quasi-static rate of 0. 001 s^(-1) and high strain rates ranging from 1 450 to 2 540 s^(-1),respectively. It is found that the significant strain rate sensitivity can be observed in the stress-strain curves of BWK composites. The fracture morphologies of BWK composites demonstrate that the tensile failure modes are shear failure and fiber breakage under the quasi-static testing condition while interface failure and fibers pullout are at high strain rates.展开更多
This paper was published online on 28 June 2025,and there is a numerical error in Fig.1 of the published version.This correction only resulted in minor changes to the last decimal places of the root mean square(rms)de...This paper was published online on 28 June 2025,and there is a numerical error in Fig.1 of the published version.This correction only resulted in minor changes to the last decimal places of the root mean square(rms)deviation of the BWK formula,and through rigorous verification,such discrepancies will not have any impact on the key conclusions of the paper.The Fig.1 in the published version is corrected as Fig.1 in this erratum.Fig.1.Differences between the experimental binding energies and predictions calculated using the BWK*and BWK formulas,respectively.The dashed lines denote the traditional magic numbers.展开更多
The effect of courtyards as microclimate modifiers on the sustainability of traditional houses in a region with 13Wks mesoclimate in Iran was explored. The principle behind traditional Iranian courtyards was investiga...The effect of courtyards as microclimate modifiers on the sustainability of traditional houses in a region with 13Wks mesoclimate in Iran was explored. The principle behind traditional Iranian courtyards was investigated to identify the most intluential physical-environmental character- istics that can effectively improve energy efficiency in contemporary residential buildings. A field study was performed to analyze various physical elements of six valuable traditional courtyard houses located in a region with BWks mesodimate in Iran. These elements included the orientation, extension, rotation angle, dimensions, and proportions of enclosed and open spaces, as well as physical bodies （opaque waUs）, transparent surfaces （openings）, and natural elements （water and soil）. Results showed that most of the studied Iranian courtyards were particularly designed to enable orientation, dimension, and proportion to act as microdimate modifiers. All survey-based data were sumrnarized and integrated to propose a physical- environmental design model for courtyards as a useful energy-efficient strategy for contem- porary sustainable housing in a region with BWks mesoctimate. The proposed model can be generalized to all design cases located in areas with similar climatic conditions.展开更多
基金National Natural Science Foundations of China(Nos.11272087,11572085)Financial Supports from Foundation for the Fok Ying-Tong Education Foundation of China(No.141070)the Fundamental Research Funds for the Central Universities of China(No.170310103)
文摘The in-plane tensile behaviors of bi-axial warp-knitted(BWK) composites under quasi-static and high strain rates loading were experimentally analyzed in this article. The tensile tests were conducted along warp direction( 0°) and weft direction( 90°) at quasi-static rate of 0. 001 s^(-1) and high strain rates ranging from 1 450 to 2 540 s^(-1),respectively. It is found that the significant strain rate sensitivity can be observed in the stress-strain curves of BWK composites. The fracture morphologies of BWK composites demonstrate that the tensile failure modes are shear failure and fiber breakage under the quasi-static testing condition while interface failure and fibers pullout are at high strain rates.
基金National Natural Science Foundation of China(12375109,11875070,11935001)the Anhui project(Z010118169)+2 种基金the Key Research Foundation of Education Ministry of Anhui Province(2023AH050095)University Synergy Innovation Program of Anhui Province(GXXT-2023-007)the University Natural Science Outstanding Youth Research Projects of Anhui Province(2022AH030039)。
文摘This paper was published online on 28 June 2025,and there is a numerical error in Fig.1 of the published version.This correction only resulted in minor changes to the last decimal places of the root mean square(rms)deviation of the BWK formula,and through rigorous verification,such discrepancies will not have any impact on the key conclusions of the paper.The Fig.1 in the published version is corrected as Fig.1 in this erratum.Fig.1.Differences between the experimental binding energies and predictions calculated using the BWK*and BWK formulas,respectively.The dashed lines denote the traditional magic numbers.
文摘The effect of courtyards as microclimate modifiers on the sustainability of traditional houses in a region with 13Wks mesoclimate in Iran was explored. The principle behind traditional Iranian courtyards was investigated to identify the most intluential physical-environmental character- istics that can effectively improve energy efficiency in contemporary residential buildings. A field study was performed to analyze various physical elements of six valuable traditional courtyard houses located in a region with BWks mesodimate in Iran. These elements included the orientation, extension, rotation angle, dimensions, and proportions of enclosed and open spaces, as well as physical bodies （opaque waUs）, transparent surfaces （openings）, and natural elements （water and soil）. Results showed that most of the studied Iranian courtyards were particularly designed to enable orientation, dimension, and proportion to act as microdimate modifiers. All survey-based data were sumrnarized and integrated to propose a physical- environmental design model for courtyards as a useful energy-efficient strategy for contem- porary sustainable housing in a region with BWks mesoctimate. The proposed model can be generalized to all design cases located in areas with similar climatic conditions.
