KumiswaIsayensi

Umthetho kaHooke

Iningi lethu wazibuza ukuthi izinto ngokumangalisayo liziphathe lapho zihlatshwa?

Ngokwesibonelo, kungani indwangu, uma thina yokwelula kuyo yonke izinkomba, Ungahudula ku isikhathi eside, futhi kwenye indawo ungakwazi ngokuzumayo aphule? Futhi kungani ukuhlola okufanayo kunzima kakhulu kangakanani ukuba afeze ngepeniseli? Yini ukumelana elinama kuncike? Indlela zinomthelela elithize abengumsunguli amenable ukuba ukusonteka esisuka?

Zonke lezi futhi abaningi mibuzo neminye eminyakeni engaphezu kuka-300 edlule ngizibuze umcwaningi British Robert Guk. Ngathola izimpendulo, manje bahlanganiswe ngaphansi kwegama ezivamile "Umthetho kaHooke ethi".

Ngokusho nocwaningo lwakhe, impahla ngayinye has a okuthiwa entwasahlobo njalo. Le mpahla, okuvumela kwento okufanele sinwebiswe ngezinga elithile. Coefficient kuyaqina - njalo. Lokhu kusho ukuthi impahla ngayinye kungenziwa kuphela ukusekela izinga elithile ukumelana, ngemva kwalokho-ke sifinyelela ezingeni ukusonteka unomphela.

Ngokuvamile, umthetho kaHooke kungenziwa esashiwo ifomula:

F = k / x /,

lapho F - amandla nokunwebeka, k - the sekushiwo wemfihlo nokunwebeka, kanye / x / - ushintsho ubude impahla. Asho ushintsho kule inkomba? Ngaphansi kwethonya ibutho ukufunda izihloko, kungaba yezinhlamvu, iraba noma yimuphi omunye ushintsho, ukuzelula kancane noma zincipha. Ngokushintsha ubude kulokhu umehluko phakathi obuphelele yokuqala neyokugcina into efundwayo. Okungukuthi, kangakanani welulela / yancipha entwasahlobo (iraba, uchungechunge, njll)

Ngakho, ngokwazi ubude kanye entwasahlobo Coefficient njalo okwesikhathi impahla unikezwa, kungenzeka ukuthola amandla ngawo impahla sisalokhu, amandla nokunwebeka noma efana namanje uvame ukubizwa Umthetho kaHooke.

Zikhona nezinye izimo ezikhethekile lapho umthetho njengoba injalo esezingeni esetshenziswa akukwazi. Sikhuluma yokulinganisa amandla ukusonteka e izimo phuca, okungukuthi, ezimweni lapho ukusonteka kuveza amandla wenza indaba engela. Umthetho kaHooke phuca ungaboniswa kanje:

τ = gy,

lapho τ - amandla adingekayo, G- Coefficient njalo, eyaziwa ngokuthi i-wemfihlo phuca, y - phuca engela inani lapho engela ishintshile into.

Ukuthuthukiswa amandla nokunwebeka (uMthetho kaHooke) kusebenza kuphela endaweni kokucindezelwa amancane ukunwetshwa. Uma amandla siyaqhubeka sinomthelela into wafunda ke kuza iphuzu uma ulahlekelwa izinga awuyeki ukunwebeka, ukuthi ukufinyelela umkhawulo yayo kuyaqina. Kuncike amandla idlula amandla ukumelana naye. Ngokomthetho, lokhu kungabonakala hhayi kuphela njengoba ushintsho nemingcele ebonakalayo indaba, kodwa futhi njengoba ukwehla ukumelana layo. Amandla edingekayo ukushintsha izinto, manje encishisiwe. Ezimweni ezinjalo, ushintsho izakhiwo into, okungukuthi, umzimba ayisekho sikwazi ukumelana. sibona ekuphileni kwansuku zonke, idabukile, ephukile, amakhefu, njll Akunjalo ngempela, yebo, ubuqotho copyright, kodwa izinga ngesikhathi esifanayo kakhulu abathintekayo. Futhi Coefficient kuyaqina of indaba noma nje emzimbeni ukuma undistorted, iyeke ukuba kungathiwa zibalulekile ngokubheka uhlobo angahleliwe.

Lokhu kwenzeka wenza sikwazi ukusho ukuthi uhlelo lwento (Ubuhlobo ithunzi elehlayo elilodwa ipharamitha kusuka kwenye), isibe non-eqondile, lapho ubuhlobo kulahleka izilungiselelo, kanye ushintsho lwenzeka isimiso ezahlukene.

Ngesisekelo lezi kokuma Tomas Yung wadala wemfihlo formula kuyaqina, okwathi ngokuhamba kwesikhathi ngegama lakhe futhi uye waba isisekelo ukudalwa imfundiso yokuziphendukela kuyaqina. wemfihlo okunwebeka Kusinikeza nethuba lokucabangela i ukusonteka lapho izinguquko nokunwebeka zibaluleke. Umthetho simiswe ngalendlela lelandzelako:

E = σ / η,

lapho σ - amandla isetshenziswa endaweni cross-Sectional komzimba ngaphansi cwaningo, η - ukunwebeka wemfihlo noma kokucindezelwa umzimba, E - wemfihlo nokunwebeka belinganisa degree of ukuzelula kancane noma kokucindezelwa komzimba ngaphansi kwethonya ukucindezeleka mechanical.

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