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1、FEATURECouldthermoplasticsbetheanswerforutility-scalewindturbineblades?Themanufactureofwindturbinebladeshasbeenbasedonthermosetcompositetechnology,butthermoplasticcompositescouldofferrecyclabilityandotheradvantages.GeorgeMarshreportsonthecurrentresearchgoingonintothermopl
2、asticturbineblades.einforcedthermoplasticsofferjoinedbyheatingtheinterfaceslocallyandingeneral,aremoredamagetolerant.Rsignificantadvantagesoverthermosetsweldingthem.SmallpartscanbeinjectionCrackspropagatemoreslowlyand,beingwhenusedtoproducerotorbladesmouldedfromgranules.mor
3、eductile,thermoplasticsresistimpactsforutility-scalewindturbines.Forastart,betterandtendtoshowdamageasvisiblethermoplasticsaremalleablewhenheatedReinforcedthermoplasticscanbestrongerdentsratherthanhidingitwithinthelami-andremainplasticinsteadofsettingperma-forthesameweigh
4、tthanthermosets,sonatebehindanunblemishedsurfaceasnentlyrigidasthermosetsdo.Consequently,permittinglighterstructures.Optimisingcanhappenwiththethermosetcompos-attheendofservicelife,thermoplasticbladedesignforthesematerialsmightitesnormallyused.bladescanberecycledbyheating
5、andresultindifferentlyconfiguredstructures.formingthemintosomethingelse.GivenForinstance,bydesigningablademoreDrawbacksthatblademanufacturenowaccountslikeanaircraftwing,withribsandsparsforhundredsofthousandsoftonnesofforstiffening,designersmightbeabletoItisnotallupsideofc
6、ourse.Adisad-compositematerialeachyear,thiswilldispensewithmuchofthestructuralcorevantageofreinforcedthermoplasticsisbecomeanincreasinglyimportantbenefit.materialusedinexistingblades.Foamstheirrelativelypoorfatigueperformanceandothercoresabsorbresin,addweightcausedbyweaker
7、bondingbetweentheThermoplasticscanalsoaddressthecurecycleandcost,andmustbemachinedtoshape.fibresandtheplasticmatrix.Thebondroadblockthatslowsdownproductionofbetweenthetwoismechanical,createdbythermosetbladestoday.Inessence,theirlinearThermoplasticpropertiesincludehighshri
8、nkageofthematrixaroundthefibrespolymerchainsdonotcrosslinkandthereforestrengthandstiffnesstoweig
