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The effects of mismatch fracture properties in encapsulation-based self-healing concrete using cohesive-zone

Luthfi Muhammad MAULUDIN, Chahmi OUCIF, Timon RABCZUK

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3, Pages 792-801 doi: 10.1007/s11709-020-0629-0

Abstract: ratios embedded in the mortar matrix is analyzed numerically along with their interfacial transition zoneThis study focuses on the effects of mismatch fracture properties, namely fracture strength and energysimulations of 2D specimens under uniaxial tension were carried out to investigate the key features on the fracturepatterns of the capsule and produce the fracture maps as the results.The developed fracture maps of capsules present a simple but valuable tool to assist the experimentalists

Keywords： self-healing concrete interfacial zone capsule materials cohesive elements fracture maps

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Correlation between tension softening relation and crack extension resistance in concrete

Xiufang ZHANG , Shilang XU ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3, Pages 323-329 doi: 10.1007/s11709-009-0041-2

Abstract: extension resistance curve, one of the fundamental fracture criteria in crack mechanics.Recently, experimental observation of the fracture behavior in concrete was used to develop a new fractureprocess.process zone ahead of the stress-free crack tip.process zone.

Keywords： concrete fracture process zone crack extension G_R resistance tension softening curve

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Experimental research on ductile fracture criterion in metal forming

Song YU, Weiming FENG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3, Pages 308-311 doi: 10.1007/s11465-011-0233-z

Abstract:

Ductile fracture criterion is key limitation parameter in material forming.Accuracy predicting surface and internal failure in plastic deformation process affects on the technology, and 11 widely used ductile fracture criterion are selected to simulate the physical experiments andtheir relative accuracy for predicting and quantifying fracture initiation sites are investigated.The comparing results show that metal forming process under high triaxiality can be estimated successively

Keywords： ductile fracture criteria metal forming process material experiment stress triaxiality

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Assessment of fracture process in forta and polypropylene fiber-reinforced concrete using experimental

Seyed Hamid KALALI; Hamid ESKANDARI-NADDAF; Seyed Ali EMAMIAN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12, Pages 1633-1652 doi: 10.1007/s11709-022-0876-3

Abstract: This paper aims to characterize the evolution of the fracture process and the cracking behavior in Forta-FerroDIC results revealed that the major crack and fracture appeared at the peak load of the control specimenload was observed in the fiber specimens, which thenbegan to connect with each other up to the final fractureThe accuracy of the results supports DIC as a reliable alternative for the characterization of the fractureprocess in fiber-reinforced concrete.

Keywords： fiber-reinforced concrete forta-ferro and polypropylene fiber fracture process cracking behavior

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Simple model of sludge thickening process in secondary settlers

Yuankai ZHANG,Hongchen WANG,Lu QI,Guohua LIU,Zhijiang HE,Songzhu JIANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2, Pages 319-326 doi: 10.1007/s11783-014-0758-6

Abstract: during peak flows and therefore plays an important role in the performance of the activated sludge processIn this study, by detecting the hindered zone from the complete thickening process of activated sludgevelocity, , describing the potential and performance of activated sludge thickening in the hindered zoneHowever, sludge thickening in the compression zone was not studied because sludge in the compressionzone showed limited thickening.

Keywords： wastewater treatment plants secondary settler sludge thickening sludge settling hindered zone

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Application of Underground Fracture Connection Monitoring in Anpeng Alkali Mine

Qi Tiexin,Liu Jianzhong,Qi Guilin,Dong Feng

Strategic Study of CAE 2006, Volume 8, Issue 7, Pages 63-67

Abstract:

In this paper, the theories, techniques, methodologies, and results of monitoring primary fractures connecting to the injection well in Anpeng Alkali Mine are presented, which combines micro-seismic monitoring with leveling survey techniques. By these theories, techniques and methodologies, the production well was located within the fractured band connecting to the injection well at a depth of over 1 000 meters, which makes it possible for continuous water injection and alkali solution production in Anpeng Alkali Mine.

Keywords： Anpeng Alkali Mine wet process for alkali extraction underground fracture connection leveling survey

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Applying the multi-zone model in predicting the operating range of HCCI engines

Ming JIA, Maozhao XIE, Zhijun PENG,

Frontiers in Energy 2010, Volume 4, Issue 3, Pages 414-423 doi: 10.1007/s11708-010-0108-8

Abstract: In this paper, a multi-zone model is developed to predict the operating range of homogeneous charge compression

Keywords： homogeneous charge compression ignition (HCCI) engine multi-zone operating range

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Tests on impact effect of partial fracture at steel frame connections

CHEN Yiyi, BIAN Ruoning

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4, Pages 295-301 doi: 10.1007/s11709-008-0049-z

Abstract: Impact effect of sudden fracture at steel frame connections under severe earthquake or other extremeThe relation of impulse caused by structural fracture to the release of inner force at the cracked locationIt is proven that the response during the fracture process can be measured quite well using high-frequencyand partial fracture.Numerical evaluation of the impact effect of connection fracture is carried out.

Keywords： structural fracture natural fracture progressive high-frequency

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Effect of fly ash replacement level on the fracture behavior of concrete

Mahdi AREZOUMANDI, Jeffery S. VOLZ

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4, Pages 411-418 doi: 10.1007/s11709-013-0228-4

Abstract: results of an experimental investigation that evaluates effect of fly ash replacement level on the fractureThis experimental program consisted of 32 fracture beams to study the fracture behavior of concrete.The experimental fracture energies were compared with the fracture energy provisions of different designevaluate whether or not there is any statistically significant difference between the experimental fracturethese statistical tests show that the mix with higher level of fly ash replacement level has higher fracture

Keywords： concrete fracture energy fly ash

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Computational modeling of fracture in concrete: A review

Luthﬁ Muhammad Mauludin, Chahmi Oucif

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3, Pages 586-598 doi: 10.1007/s11709-020-0573-z

Abstract: This paper presents a review of fracture modeling of concrete.Based on comprehensive literature review, there are two main approaches considered to-date of concrete fractureThe purpose of this review is to provide insight comparison from different techniques in modeling of fractureIn the first section, an overview of fracture modeling in general is highlighted.

Keywords： concrete fracture macroscopic micromechanical heterogeneity

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Computational modeling of fracture in capsule-based self-healing concrete: A 3D study

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6, Pages 1337-1346 doi: 10.1007/s11709-021-0781-1

Abstract: We present a three-dimensional (3D) numerical model to investigate complex fracture behavior using cohesivepre-inserted cohesive elements are also applied into the initial meshes of solid elements to account for fractureThe proposed model provides an effective tool for predicting the complex fracture response of capsule-based

Keywords： 3D fracture self-healing concrete spherical cohesive elements heterogeneous

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Evaluating the material strength from fracture angle under uniaxial loading

Jitang FAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2, Pages 288-293 doi: 10.1007/s11709-018-0480-8

Abstract: Generally, shearing fracture model occurs in both the tests.Shearing fracture angle is smaller than 45° under uniaxial compression and greater than 45° under uniaxialof material strength under uniaxial compression and tension is developed by correlating the shearing fracturerelation is quantitatively illustrated by a function for analyzing the material strength from shear fracture

Keywords： strength fracture mechanics

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A dimensional analysis on asphalt binder fracture and fatigue cracking

Qian ZHAO, Zhoujing YE

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 2, Pages 201-206 doi: 10.1007/s11709-017-0402-1

Abstract: Fracture and fatigue cracking in asphalt binder are two of most serious problems for pavement engineersconsists both of dimensional analysis using Buckingham Theorem and -integral analysis based on classic fracturemechanics, to evaluate the fracture and fatigue on asphalt binder.is discovered that the dimensional analysis could provide a new perspective to analyze the asphalt fracture

Keywords： Dimensional analysis asphalt fracture fatigue cracking

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Rolling process and fatigue property of a new-type hot-rolled low-carbon TRIP steel

Liu Ziquan,Tan Xiaodong,Yang Xiaolong,Xu Yunbo,Wu Di and Wang Guodong

Strategic Study of CAE 2014, Volume 16, Issue 1, Pages 54-58

Abstract:

The mechanical properties， microstructures， fatigue properties and fatigue fractures of the conventional C-Mn wheel steels and the low- carbon low- silicon phosphorus/chromium-contained transformation induced plasticity（TRIP）steel were investigated. Results revealed that the new-type TRIP steel possessed similar yield strength ， tensile strength increased by 100~150 MPa and fatigue limit increased by 50~140 MPa，compared with the conventional C-Mn wheel steels. The fatigue limit increased with the increase of the tensile strength. The steel containing ferrite，bainite and retained austenite had a higher fatigue limit than the steel containing ferrite，bainite and pearlite or steel containing ferrite，pearlite and martensite-austenite islands.

Keywords： hot- rolling low-carbon TRIP steel rolling process fatigue property fatigue fracture

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Hybrid deep learning model for risk prediction of fracture in patients with diabetes and osteoporosis

Frontiers of Medicine 2022, Volume 16, Issue 3, Pages 496-506 doi: 10.1007/s11684-021-0828-7

Abstract: The fracture risk of patients with diabetes is higher than those of patients without diabetes due toIn addition, the fracture risk of patients with diabetes and osteoporosis has not been further studiedIn this paper, a hybrid model combining XGBoost with deep neural network is used to predict the fracturepatients with diabetes and osteoporosis, and investigate the effect of patients’ physiological factors on fractureMoreover, the top 18 influencing factors of fracture risks of patients with diabetes are determined.

Keywords： XGBoost deep neural network healthcare risk prediction