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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.extension resistance curve, to analyze crack propagation during the entire concrete fracture processThe variation of the crack extension resistance is mainly associated with the energy consumption in theThe crack extension resistance is then a function of the softening curve, which is a basic mechanicalThe relationship between the softening curve and the crack extension resistance curve is then analyzed

Keywords： concrete     fracture process zone     crack extension G<sub>Rsub> resistance     tension softening curve    

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Preparation and characterization of hydrothermally engineered TiO

Kanchapogu Suresh, G. Pugazhenthi, R. Uppaluri

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 2,   Pages 266-279 doi: 10.1007/s11705-017-1608-4

Abstract: This work targets the preparation and characterization of an inexpensive TiO -fly ash composite membrane for oily wastewater treatment. The composite membrane was fabricated by depositing a hydrophilic TiO layer on a fly ash membrane via the hydrothermal method, and its structural, morphological and mechanical properties were evaluated. The separation potential of the composite membrane was evaluated for 100–200 mg·L synthetic oily wastewater solutions. The results show that the composite membrane has excellent separation performance and can provide permeate stream with oil concentration of only 0.26–5.83 mg·L . Compared with the fly ash membrane in the average permeate flux and performance index (49.97 × 10 m ·m ·s and 0.4620%, respectively), the composite membrane exhibits better performance (51.63 × 10 m ·m ·s and 0.4974%). For the composite ash membrane, the response surface methodology based analysis inferred that the optimum process parameters to achieve maximum membrane flux and rejection are 207 kPa, 200 mg·L and 0.1769 m·s for applied pressure, feed concentration and cross flow velocity, respectively. Under these conditions, predicted responses are 41.33 × 10 m ·m ·s permeate flux and 98.7% rejection, which are in good agreement with the values obtained from experimental investigations (42.84 × 10 m ·m ·s and 98.82%). Therefore, we have demonstrated that the TiO -fly ash composite membrane as value added product is an efficient way to recycle fly ash and thus mitigate environmental hazards associated with the disposal of oily wastewaters.

Keywords： TiO<sub>2sub>-fly ash membrane     oily wastewater     fouling     microfiltration    

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Study of the Relationship Between Fractal Model Parameters and Roughness Parameter R<sub>asub>

Pan Yuliang,Wu Liqun,Zhang Yundian

Strategic Study of CAE 2004, Volume 6, Issue 5,   Pages 49-51

Abstract:

The W-M fractal model and the physical meaning of fractal parameters (D, G，y) are briefly introducedThe relationships between model parameters and roughness parameter R<sub>asub> are studied theoretically

Keywords： W-M fractal model     fractal parameters     roughness R<sub>asub>    

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Non-thermal plasma for exhaust gases treatment

Elvia ALVA R.,Marquidia PACHECO P.,Fernando GÓMEZ B.,Joel PACHECO P.,Arturo COLÍN C.

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 3,   Pages 301-305 doi: 10.1007/s11465-015-0344-z

Abstract:

This article describes a study on a non-thermal plasma device to treat exhaust gases in an internal combustion engine. Several tests using a plasma device to treat exhaust gases are conducted on a Honda GX200-196 cm3 engine at different rotational speeds. A plasma reactor could be efficient in degrading nitrogen oxides and particulate matter. Monoxide and carbon dioxide treatment is minimal. However, achieving 1%–3% degradation may be interesting to reduce the emission of greenhouse gases.

Keywords： plasma treatment     NO<sub>xsub>     CO     CO<sub>2sub>     particulate matter     vehicle    

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Denitrification performance and sulfur resistance mechanism of Sm–Mn catalyst for low temperature NH-SCR

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 5,   Pages 617-633 doi: 10.1007/s11705-022-2258-8

Abstract: MnO<sub>xsub> and Sm–Mn catalysts were prepared with the coprecipitation method, and they showedsub> by NH<sub>3sub> between 50 and 300 °C in the presence of excess oxygen. 0.10Sm–Mn catalyst indicatedbetter catalytic activity and sulfur resistance.Therefore, it significantly enhances the NO conversion, N<sub>2sub> selectivity, and sulfur resistancesulfur resistance of the 0.10Sm–Mn catalyst.

Keywords： MnO<sub>xsub>     Sm–Mn     catalyst     NH<sub>3sub>-SCR     sulfur resistance    

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Ductile extension of 3-D external circumferential cracks in pipe structures

Wuchao YANG, Xudong QIAN

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 294-303 doi: 10.1007/s11709-011-0115-9

Abstract: This study investigates the ductile fracture resistance of 3-D external circumferential cracks in theThe ductile crack extension utilizes an element extinction technique implemented in the computationalcomputational cell method, i.e., the initial porosity ratio , is calibrated using both the fracture resistanceThe fracture resistance along the 3-D semi-elliptical crack front is computed from the calibrated celldemonstrates that an equivalent 2-D axi-symmetric model provides conservative estimations of the fracture resistance

Keywords： ductile fracture     computational cell method     G-T model     J-R curve    

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Adsorption characteristics of ciprofloxacin onto g-MoS<sub>2sub><

Zhenyu Yang, Rong Xing, Wenjun Zhou, Lizhong Zhu

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 3, doi: 10.1007/s11783-019-1218-0

Abstract: The g-MoS2 coated composites (g-MoS2-BC) were synthesized.The adsorption mechanisms of CIP on g-MoS2-BC were proposed.The g-MoS2 coated biochar (g-MoS2-BC) composites were synthesized by coating original biochar with g-MoS2The coated g-MoS2 nanosheets contributed more to CIP adsorption on the g-MoS2-BC composites due to theiron g-MoS2-BC300.

Keywords： Adsorption     Ciprofloxacin     g-MoS<sub>2sub> nanosheets     Biochar     Soil remediation    

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g-CN-coated MnO hollow nanorod cathode for stable aqueous Zn-ion batteries

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 2,   Pages 217-225 doi: 10.1007/s11705-022-2214-7

Abstract: Herein, superior α-MnO<sub>2sub>@g-C<sub>3sub>N<sub>4sub> was successfully prepared forstable zinc-ion batteries (ZIBs) cathode by introducing g-C<sub>3sub>N<sub>4sub> nanosheets.Compared with pure α-MnO<sub>2sub>, α-MnO<sub>2sub>@g-C<sub>3sub>N<sub>4sub> hasEven at 1 A·g–1, the α-MnO<sub>2sub>@g-C<sub>3sub>N<sub>4sub> still retains 100The α-MnO<sub>2sub>@g-C<sub>3sub>N<sub>4sub>-based cathode has the highest energy density

Keywords： α-MnO<sub>2sub> hollow nanorods     g-C<sub>3sub>N<sub>4sub>     heterojunction     aqueous Zn-ion    

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Spray Preparation, Microstructure and Properties of Al<sub>2sub>O<sub>3sub>-M<sub>xsub>O Hard -

Wang Biao,Wang Yudong,Li Huiling,Zhang Zihua

Strategic Study of CAE 2002, Volume 4, Issue 9,   Pages 75-80

Abstract: carbon steel substrate, base coating of nickel-coated aluminium and intermediate coating of 50% Al<sub>2sub>O<sub>3sub> + 50% Ni were prepared by means of oxyacetylene spray, and final coating of Al<sub>2sub>O<sub>3sub> ～ M<sub>xsub>O<sub>ysub> was prepared by means of plasma spray.of 60% (mass) sulphuric acid with 60 % concentration, and 40% (mass) phosphoric ore powder, the Al<sub>2sub>O<sub>3sub> ～ M<sub>xsub>O<sub>ysub> coating resistance to corrosion and wear, is 7.46

Keywords： Al<sub>2sub>O<sub>3sub>-M<sub>xsub>O<sub>ysub>     coating     plasma     resistance to corrosion     resistance    

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Direct Evidence of Coal Swelling and Shrinkage with Injecting CO<sub>2sub> and N<sub>2sub> Using Article

Guanglei Zhang, P.G. Ranjith, Herbert E. Huppert

Engineering 2022, Volume 18, Issue 11,   Pages 88-95 doi: 10.1016/j.eng.2022.03.010

Abstract: >2sub>) disposal and are generally located near large point sources of CO<sub>2sub> emissions.The injection of CO<sub>2sub> into coal seams has great potential to sequester CO<sub>2sub> whilesimultaneously enhancing coalbed methane (CO<sub>2sub>-ECBM) recovery.>2sub> adsorption.>2sub> and CO<sub>2sub>—is an attractive alternative for ECBM recovery instead of pure CO<sub

Keywords： CCS     CO<sub>2sub>     -ECBM     Carbon neutrality     X-ray imaging     Coal permeability    

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Preparation and lithium storage performances of g-C

Zhengxu BIAN, Zehua TANG, Jinfeng XIE, Junhao ZHANG, Xingmei GUO, Yuanjun LIU, Aihua YUAN, Feng ZHANG, Qinghong KONG

Frontiers in Energy 2020, Volume 14, Issue 4,   Pages 759-766 doi: 10.1007/s11708-020-0810-0

Abstract: To ameliorate the volume expansion issue of silicon-based anode materials, g-C N /Si nanocomposites areIt is well known that g-C N /Si nanocomposites can not only improve the electronic transmission abilityWhen g-C N /Si electrode is evaluated, the initial discharge capacity of g-C N /Si nanocomposites isas high as 1033.3 mAh/g at 0.1 A/g, and its reversible capacity is maintained at 548 mAh/g after 400at 2.0 A/g.

Keywords： magnesium thermal reduction     g-C<sub>3sub>N<sub>4sub>/Si nanocomposites     volume expansion     electroconductivity    

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Metal-organic framework-based CO

Yujie Ban, Meng Zhao, Weishen Yang

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 2,   Pages 188-215 doi: 10.1007/s11705-019-1872-6

Abstract: targets secondary building units, pore structure, topology and hybridization and (ii) construction of crack-free

Keywords： CO<sub>2sub> capture     CO<sub>2sub>-philic MOFs     crack-free membranes    

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A CO and CO

Guoxing Chen, Marc Widenmeyer, Binjie Tang, Louise Kaeswurm, Ling Wang, Armin Feldhoff, Anke Weidenkaff

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 3,   Pages 405-414 doi: 10.1007/s11705-019-1886-0

Abstract: Their chemical compatibility, oxygen permeability, CO and CO tolerance, and long-term CO resistance

Keywords： K<sub>2sub>NiF<sub>4sub> structure     oxygen permeation membrane     CO<sub>2sub> and CO resistances     CO<sub>2sub> plasma resistance     long-term robustness    

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Tuning nitrogen defects and doping sulfur in carbon nitride for enhanced visible light photocatalytic activity

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 93-101 doi: 10.1007/s11705-022-2175-x

Abstract: heteroatom doping are effective strategies for improving photocatalytic activity of carbon nitride (g-CHigh-energy electrons generated by plasma can produce N defects and embed sulfur atoms into g-C<sub>3The g-C<sub>3sub>N<sub>4sub> with moderate concentration of N defects exhibited the highest photocatalyticS-doped g-C<sub>3sub>N<sub>4sub> exhibited 11.25 times higher photocatalytic activity than pure g-CThe N vacancy-enriched and S-doped g-C<sub>3sub>N<sub>4sub> are beneficial for widening absorption

Keywords： g-C<sub>3sub>N<sub>4sub>     nitrogen defect     sulfur doping     photodegradation     plasma    

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Fracture resistance on aggregate bridging crack in concrete

ZHANG Xiufang, XU Shilang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 1,   Pages 63-70 doi: 10.1007/s11709-007-0006-2

Abstract: In this investigation, the fracture resistance induced by aggregate bridging, denoted by GI-bridging,Utilizing the obtained load against crack opening displacement curve, the value of G at any crack extensionas well as the change of G with the crack extension is examined.It is found that G will firstly increase with the development of crack and then stay constant once theThe results reveal that the values of G of different specimens at any crack propagation are strongly
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Title Author Date Type Operation

Correlation between tension softening relation and crack extension resistance in concrete

Xiufang ZHANG , Shilang XU ,

Journal Article

Preparation and characterization of hydrothermally engineered TiO

Kanchapogu Suresh, G. Pugazhenthi, R. Uppaluri

Journal Article

Study of the Relationship Between Fractal Model Parameters and Roughness Parameter R<sub>asub>

Pan Yuliang,Wu Liqun,Zhang Yundian

Journal Article

Non-thermal plasma for exhaust gases treatment

Elvia ALVA R.,Marquidia PACHECO P.,Fernando GÓMEZ B.,Joel PACHECO P.,Arturo COLÍN C.

Journal Article

Denitrification performance and sulfur resistance mechanism of Sm–Mn catalyst for low temperature NH-SCR

Journal Article

Ductile extension of 3-D external circumferential cracks in pipe structures

Wuchao YANG, Xudong QIAN

Journal Article

Adsorption characteristics of ciprofloxacin onto g-MoS<sub>2sub><

Zhenyu Yang, Rong Xing, Wenjun Zhou, Lizhong Zhu

Journal Article

g-CN-coated MnO hollow nanorod cathode for stable aqueous Zn-ion batteries

Journal Article

Spray Preparation, Microstructure and Properties of Al<sub>2sub>O<sub>3sub>-M<sub>xsub>O Hard -

Wang Biao,Wang Yudong,Li Huiling,Zhang Zihua

Journal Article

Direct Evidence of Coal Swelling and Shrinkage with Injecting CO<sub>2sub> and N<sub>2sub> Using

Guanglei Zhang, P.G. Ranjith, Herbert E. Huppert

Journal Article

Preparation and lithium storage performances of g-C

Zhengxu BIAN, Zehua TANG, Jinfeng XIE, Junhao ZHANG, Xingmei GUO, Yuanjun LIU, Aihua YUAN, Feng ZHANG, Qinghong KONG

Journal Article

Metal-organic framework-based CO

Yujie Ban, Meng Zhao, Weishen Yang

Journal Article

A CO and CO

Guoxing Chen, Marc Widenmeyer, Binjie Tang, Louise Kaeswurm, Ling Wang, Armin Feldhoff, Anke Weidenkaff

Journal Article

Tuning nitrogen defects and doping sulfur in carbon nitride for enhanced visible light photocatalytic activity

Journal Article

Fracture resistance on aggregate bridging crack in concrete

ZHANG Xiufang, XU Shilang

Journal Article