?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=A+micromechanical+study+of+the+equivalent+granular+void+ratio+of+soil+mixtures+using+DEM&rft.creator=Minh%2C+NH&rft.creator=Cheng%2C+YP&rft.description=The+concept+of+intergranular+void+ratio+has+become+more+popular+in+characterising+the%0D%0Abehaviour+of+soil+mixtures+of+sand+and+fine+particles+up+to+a+threshold+transitional+fines+content.+The+transitional%0D%0Afines+content+at+which+these+mixtures+change+from+a+sand-dominated+to+a+fines-dominated+behaviour+is%0D%0Ausually+defined+as+the+densest+mixture.+For+samples+having+a+less-than-transitional+fines+content%2C+the+fine+particles%0D%0Acan+fall+inside+the+void+spaces+created+by+the+larger+sand+particles.+Assuming+all+fine+particles+are+inactive%0D%0Aand+hence+treated+as+void%2C+the+compression+curves+of+different+sand-dominated+mixtures+can+be+represented+by%0D%0Aa+single+curve+in+term+of+the+intergranular+void+ratio.+More+recently+an+additional+%E2%80%98b%E2%80%99+parameter+was+defined+as%0D%0Athe+fraction+of+the+active+fine+particles+out+of+the+total+fine+content+and+only+the+inactive+fine+fraction+was+counted%0D%0Aas+void.+The+value+of+b+was+usually+obtained+from+back-analysis+or+predicted+using+a+semi-empirical+approach.%0D%0AIn+this+numerical+study+using+the+Discrete+Element+Method+(DEM)%2C+various+definitions+of+the+intergranular+void%0D%0Aratio+e%E2%88%97+are+investigated+and+discussed%2C+together+with+the+micromechanical+data+showing+the+actual+involvement%0D%0Aof+the+fine+particles+in+the+force+transmission.+The+results+show+that+the+value+of+b+is+related+to+the+fraction+of+the+fine+particles+involved+in+transmitting+the+strong%2C+larger-than-average+contact+forces.+The+value+of+b+is+not+constant+but+increases+with+stress+level+(decreasing+void+ratio)+and+fines+content+for+samples+having+fines+content+less+than+the+threshold+value.&rft.subject=Science+%26+technology%2C+technology%2C+physical+sciences%2C+engineering%2C+geological%2C+geosciences%2C+multidisciplinary%2C+engineering%2C+geology%2C+one-dimensional+compression%2C+behavior%2C+fines%2C+stress%2C+sand.&rft.publisher=CRC+Press-Taylor+%26+Francis+Group&rft.contributor=Soga%2C+K&rft.contributor=Kumar%2C+K&rft.contributor=Biscontin%2C+G&rft.contributor=Kuo%2C+M&rft.date=2014-09-04&rft.type=Proceedings+paper&rft.language=eng&rft.source=+++++In%3A+Soga%2C+K+and+Kumar%2C+K+and+Biscontin%2C+G+and+Kuo%2C+M%2C+(eds.)+Geomechanics+from+Micro+to+Macro.++(pp.+pp.+219-224).++CRC+Press-Taylor+%26+Francis+Group%3A+Cambridge%2C+UK.+(2014)+++++&rft.format=text&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F1466178%2F1%2FA%2520micromechanical%2520study%2520of_Cheng.H.pdf&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F1466178%2F&rft.rights=open