Ngaba ibholiti ye-axial force kunye nokulayisha kwangaphambili ngumbono?
Amandla e-axial ye-Bolt kunye ne-pretightening force ayiyongcamango efanayo, kodwa inxulumene nomlinganiselo othile.
I-Bolt axial force ibhekisela kuxinzelelo okanye uxinzelelo olwenziwe kwibholithi, eyenziwa ngenxa ye-torque kunye nokuqina kwangaphambili okusebenzayo kwibholithi. Xa i-bolt iqinisiwe, i-torque kunye ne-pre-tightening force isebenza kwi-bolt ukuvelisa i-axial tension okanye i-compression force, eyi-bolt axial force.
Ukulayisha kwangaphambili luxinzelelo lokuqala okanye ucinezelo olusetyenziswayo phambi kokuba ibholithi iqiniswe. Xa ibholithi iqinisiwe, ukulayisha kwangaphambili kudala i-axial tensile okanye i-compressive forces kwi-bolt kwaye icinezele iindawo ezidityanisiweyo kunye. Ubungakanani be-preload budla ngokugqitywa ngumthamo we-torque okanye ukunweba.
Ngoko ke, amandla okuqinisa kwangaphambili esinye sezizathu ze-axial tensile okanye i-compressive force ye-bolt, kwaye enye yezinto ezibalulekileyo ezilawula i-axial tensile okanye i-compressive force ye-bolt.
Luyintoni unxulumano phakathi kokulayisha kwangaphambili kwebholiti kunye namandla ayo esivuno?
Amandla okuqinisa kwangaphambili adlala indima ebaluleke kakhulu ekuqiniseni nasekudibaniseni iibholiti, kwaye ubukhulu bayo bufanele bube ngokwaneleyo ukwenza ukuba iibholithi zivelise ukunyanzeliswa kwe-axial, ngaloo ndlela kuqinisekiswe ukuqina kunye nokukhuseleka kweendawo zokudibanisa.
Amandla esivuno sebholithi abhekisa kumandla ebholithi ukufezekisa ukuguqulwa kweplastiki okanye ukungaphumeleli xa iphantsi koxinzelelo lwe-axial. Ukuba i-preload idlula amandla emveliso yebholithi, ibholithi inokukhubazeka ngokusisigxina okanye ingaphumeleli, ibangele ukuba idibeneyo ikhululwe okanye ingaphumeleli.
Ke ngoko, amandla okuqinisa ibholithi kufuneka alawulwe ngaphakathi koluhlu olufanelekileyo, hayi kakhulu okanye encinci kakhulu, kwaye kufuneka imiselwe ngokwemiba efana namandla esivuno sebholiti, iipropathi zezinto eziphathekayo, imeko yoxinzelelo lwesinxibelelanisi, kunye nendawo yokusebenza. Ngokuqhelekileyo, i-bolt pretightening force kufuneka ilawulwe ngaphakathi kwinqanaba le-70% ~ 80% yamandla okuvelisa i-bolt ukuqinisekisa ukhuseleko kunye nokuthembeka koqhagamshelwano.
Yintoni amandla emveliso yebholithi?
Amandla esivuno sebholithi abhekisele kumandla asezantsi ebholithi athi ajikeke iplastiki xa iphantsi koxinzelelo lwe-axial, kwaye idla ngokubonakaliswa ngokokunyanzeliswa kweyunithi yendawo nganye (N/mm² okanye iMPa). Xa ibholithi itsalwa ngaphaya kwamandla ayo okuvelisa, ibholithi iya kuba ikhubazeke ngokusisigxina, oko kukuthi, ayiyi kukwazi ukubuyela kwimo yayo yangaphambili, kwaye uqhagamshelo lusenokukhululeka okanye lungaphumeleli.
Amandla okuvelisa iibholithi anqunywe yizinto ezifana neempawu eziphathekayo kunye neemeko zenkqubo. Xa uyila kunye nokukhetha iibholiti, kuyimfuneko ukukhetha iibholiti ezinamandla okwaneleyo kwesivuno ngokweemfuno zamacandelo okudibanisa kunye nendawo yokusebenza kunye nezinye izinto. Ngexesha elifanayo, xa uqinisa iibholithi, kuyafuneka kwakhona ukugqiba ubungakanani bamandla okuqinisa kwangaphambili ngokuhambelana namandla emveliso yeebholithi, ukwenzela ukuba kuqinisekiswe ukuba iibholiti zinokuthwala umthwalo wokusebenza ngaphandle kokuguqulwa kweplastiki okanye umonakalo.
Ixesha lokuposa: Aug-07-2023