Fastener Pin Rotational thiab Non-Rotational Looseness Analysis
Kev siv cov fastener pin sib txuas yog qhov dav heev, thiab qhov teeb meem uas ua rau peb mob taub hau yog xoob ntawm fastener pins thaum siv. Hauv kev teb rau qhov teeb meem no, tus neeg tsim khoom tau tsim ib txoj hauv kev los tiv thaiv tus pin fastener los ntawm kev xoob, thiab muaj ntau lub tswv yim uas ua rau lub loosening ntawm tus pin fastener. Mechanism, cov hauv qab no yog thawj qhov kev paub peb qhia rau koj, Kuv vam tias nws yuav pab tau koj.
Rotational thiab non-rotational loosening
Nyob rau hauv ntau daim ntawv thov, fastener pins yog nruj kom thov preload nyob rau hauv kev sib koom tes. Loosening tuaj yeem txhais tau tias poob ntawm preload tom qab zawm tiav. Qhov no tuaj yeem tshwm sim hauv ob qho tib si. Rotational loosening, feem ntau hu ua self-loosening, yog qhov sib txawv ntawm cov pins fastener nyob rau sab nraud loads. Non-rotational looseness txhais tau hais tias tsis muaj qhov sib txawv ntawm sab hauv thiab sab nraud, tab sis poob ntawm preload tshwm sim.
Loosening ntawm fastener pins vim tsis-rotational loosening
Tom qab sib dhos, deformation ntawm tus pin fastener nws tus kheej los yog sib koom ua ke yuav ua rau tsis muaj kev sib hloov. Qhov no tej zaum yuav tshwm sim ntawm ib feem ntawm cov yas vau ntawm cov interfaces. Thaum ob qhov chaw nyob rau hauv kev sib cuag nrog ib leeg, lub asperities ntawm txhua qhov chaw yog raug rau cov kabmob nto siab load. Txij li qhov chaw sib cuag tiag tiag ntawm cov pob yuav me dua li thaj chaw macroscopic, txawm tias nyob rau hauv cov khoom nruab nrab, qhov kev ntxhov siab ntawm cov khoom tawm vim yog qhov roughness ntawm cov khoom yuav ntau dua li cov khoom siv zog, thiab cov khoom no yuav dais. siab heev hauv zos kev nyuaj siab, ua rau cov yas deformation.
