The microstructural evolution and performance of diamond/Al composites during thermal cycling has rarely been investigated.In the present work,the thermal stability of diamond/Al composites during thermal cycling for ...The microstructural evolution and performance of diamond/Al composites during thermal cycling has rarely been investigated.In the present work,the thermal stability of diamond/Al composites during thermal cycling for up to 200 cycles was explored.Specifically,the thermal conductivity(λ)of the composites was measured and scanning electron microscopy of specific areas in the same samples was carried out to achieve quasi-in situ observations.The interface between the(100)plane of diamond and the Al matrix was well bonded with a zigzag morphology and abundant needle-like Al4C3 phases.By contrast,the interface between the(111)plane of diamond and the Al matrix showed weak bonding and debonded during thermal cycling.The debonding length increased rapidly over the first 100 thermal cycles and then increased slowly in the following 100 cycles.Theλof the diamond/Al composites decreased abruptly over the initial 20 cycles,increased afterward,and then decreased monotonously once more with increasing number of thermal cycles.Decreases in theλof the Al matrix and the corresponding stress concentration at the diamond/Al interface caused by thermal mismatch,rather than interfacial debonding,may be the main factors influencing the decrease inλof the diamond/Al composites,especially in the initial stages of thermal cycling.展开更多
Liver fibrosis,a wound healing response induced by multiple pathogenic factors(alcohol,virus,drugs,etc.),is a familiar pathological state in multiple chronic liver diseases(CLD)including non-alcoholic fatty liver dise...Liver fibrosis,a wound healing response induced by multiple pathogenic factors(alcohol,virus,drugs,etc.),is a familiar pathological state in multiple chronic liver diseases(CLD)including non-alcoholic fatty liver disease,virus hepatitis and liver cirrhosis etc[1].Longstanding hepatic fibrosis could result in cirrhosis of liver and even tumor.A recent World Health Organization report estimated that about twenty million human beings have hepatic cirrhosis and/or liver cancer globally,in which 1-2 million people die from hepatic failure every year[2].It is well known that the over-accumulation of extracellular matrix components which secreted by the activation of hepatic stellate cell is the core incident in hepatic fibrosis progress[3].Present evidence indicated that hepatic fibrosis stage is the unique reversible phase,as well as the best treatment phase of CLD.In consequence,it is urgent to exploit effective drugs to intervene liver fibrosis further develop to liver cirrhosis or cancer[4].However,there are currently no effective strategy or drugs for the treatment of liver fibrosis[5].Amazingly,Traditional herbal medicine shows significant curative effects in the treatment of CLD due to its characteristics of multi-ingredients,multi-target points,and multi-signal pathway exert effects[6-8].Among these effective herbal medicines,Curcumae Rhizoma-Sparganii Rhizoma herb pair has excellent performance in treating CLD.展开更多
The water entry is a classic fluid-structure interaction problem in ocean engineering.The prediction of impact loads on structure during the water entry is critical to some engineering applications.In this paper,a mul...The water entry is a classic fluid-structure interaction problem in ocean engineering.The prediction of impact loads on structure during the water entry is critical to some engineering applications.In this paper,a multiphase Riemann-SPH model is developed to investigate water entry problems.In this model,a special treatment,a cut-off value for the particle density,is arranged to avoid the occurrence of negative pressure.A remarkable advantage of the present multiphase SPH model is that the real speed of sound in air can be allowed when simulating water-air flows.In the present work,considering the air effect,several typical water entry problems are studied,and the evolution of multiphase interface,the motion characteristic of structure and complex fluid-structure interactions during the water entry are analyzed.Compared with the experimental data,the present multiphase SPH model can obtain satisfactory results,and it can be considered as a reliable tool in reproducing some fluid-structure interaction problems.展开更多
Correction to:Adv Aerodyn 3,13(2021)https://doi.org/10.1186/s42774-021-00066-x After publication of this article[1],it is noticed the article contained some errors.The details are listed below:(1)Page 3:In the sentenc...Correction to:Adv Aerodyn 3,13(2021)https://doi.org/10.1186/s42774-021-00066-x After publication of this article[1],it is noticed the article contained some errors.The details are listed below:(1)Page 3:In the sentence‘ca and cb denote the sound of speed of particles a and b,respectively.’,‘sound of speed’should be corrected to‘speed of sound’.(2)Page 4:In the sentence‘whereρ0 and c0 denote the initial density and the artificial sound of speed,respectively.’,‘sound of speed’should be corrected to‘speed of sound’。展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.1871072,51871073,52171136,51771063,61604086,and U1637201)the China Postdoctoral Science Foundation(Nos.2016M590280 and 2017T100240)+1 种基金the Heilongjiang Postdoctoral Foundation(Nos.LBH-Z16075 and LBH-TZ2014)the Fundamental Research Funds for the Central Universities,China(Nos.HIT.NSRIF.20161 and HIT.MKSTISP.201615).
文摘The microstructural evolution and performance of diamond/Al composites during thermal cycling has rarely been investigated.In the present work,the thermal stability of diamond/Al composites during thermal cycling for up to 200 cycles was explored.Specifically,the thermal conductivity(λ)of the composites was measured and scanning electron microscopy of specific areas in the same samples was carried out to achieve quasi-in situ observations.The interface between the(100)plane of diamond and the Al matrix was well bonded with a zigzag morphology and abundant needle-like Al4C3 phases.By contrast,the interface between the(111)plane of diamond and the Al matrix showed weak bonding and debonded during thermal cycling.The debonding length increased rapidly over the first 100 thermal cycles and then increased slowly in the following 100 cycles.Theλof the diamond/Al composites decreased abruptly over the initial 20 cycles,increased afterward,and then decreased monotonously once more with increasing number of thermal cycles.Decreases in theλof the Al matrix and the corresponding stress concentration at the diamond/Al interface caused by thermal mismatch,rather than interfacial debonding,may be the main factors influencing the decrease inλof the diamond/Al composites,especially in the initial stages of thermal cycling.
基金the National Natural Science Foundation of China(82003948)Basic Public Welfare Research Project of Zhejiang Province(LQ21H280002).
文摘Liver fibrosis,a wound healing response induced by multiple pathogenic factors(alcohol,virus,drugs,etc.),is a familiar pathological state in multiple chronic liver diseases(CLD)including non-alcoholic fatty liver disease,virus hepatitis and liver cirrhosis etc[1].Longstanding hepatic fibrosis could result in cirrhosis of liver and even tumor.A recent World Health Organization report estimated that about twenty million human beings have hepatic cirrhosis and/or liver cancer globally,in which 1-2 million people die from hepatic failure every year[2].It is well known that the over-accumulation of extracellular matrix components which secreted by the activation of hepatic stellate cell is the core incident in hepatic fibrosis progress[3].Present evidence indicated that hepatic fibrosis stage is the unique reversible phase,as well as the best treatment phase of CLD.In consequence,it is urgent to exploit effective drugs to intervene liver fibrosis further develop to liver cirrhosis or cancer[4].However,there are currently no effective strategy or drugs for the treatment of liver fibrosis[5].Amazingly,Traditional herbal medicine shows significant curative effects in the treatment of CLD due to its characteristics of multi-ingredients,multi-target points,and multi-signal pathway exert effects[6-8].Among these effective herbal medicines,Curcumae Rhizoma-Sparganii Rhizoma herb pair has excellent performance in treating CLD.
基金supported by the National Numerical Wind Tunnel Project(NNW2018-ZT2B05)the China National Funds for Distinguished Young Scientists(51925904)the PhD Student Research and Innovation Fund of the Fundamental Research Funds for the Central Universities(3072020GIP0101).
文摘The water entry is a classic fluid-structure interaction problem in ocean engineering.The prediction of impact loads on structure during the water entry is critical to some engineering applications.In this paper,a multiphase Riemann-SPH model is developed to investigate water entry problems.In this model,a special treatment,a cut-off value for the particle density,is arranged to avoid the occurrence of negative pressure.A remarkable advantage of the present multiphase SPH model is that the real speed of sound in air can be allowed when simulating water-air flows.In the present work,considering the air effect,several typical water entry problems are studied,and the evolution of multiphase interface,the motion characteristic of structure and complex fluid-structure interactions during the water entry are analyzed.Compared with the experimental data,the present multiphase SPH model can obtain satisfactory results,and it can be considered as a reliable tool in reproducing some fluid-structure interaction problems.
文摘Correction to:Adv Aerodyn 3,13(2021)https://doi.org/10.1186/s42774-021-00066-x After publication of this article[1],it is noticed the article contained some errors.The details are listed below:(1)Page 3:In the sentence‘ca and cb denote the sound of speed of particles a and b,respectively.’,‘sound of speed’should be corrected to‘speed of sound’.(2)Page 4:In the sentence‘whereρ0 and c0 denote the initial density and the artificial sound of speed,respectively.’,‘sound of speed’should be corrected to‘speed of sound’。
