Tātai tātaitanga kawenga mekameka

Ko te tātai tatau kawenga mekameka e whai ake nei: Tātai tatau taumaha mita mekameka hiki? Whakautu: Ko te tātai taketake ko te maha o ngā wāhanga = te roa katoa (mm) ÷ 14. 8 mm = 600 ÷ 14. 8 = 40. 5 (ngā wāhanga) Taumaha o ia wāhanga = He aha te tātai tatau mō te kaha kume o te mekameka maitai porowhita? Kaha pakaru mekameka Te tatau i te kaha pakaru o te mekameka roera pereti 1. Ko te ahotea pakaru iti rawa o te maitai 40Cr ko S=980N/mm2, ko te horahanga whakawhiti-wāhanga iti rawa o te hononga mekameka kotahi kei roto i ngā wae B (mm2), ā, ko te kaha pakaru iti rawa o te mekameka kei roto i ngā wae F (N). Tātai F=S×B3. Te tatau i te mekameka he matotoru 10 me te piko 80: B=15*10*2+12. 5*10*2=550mm2F=980*550=539000N Tātaitanga o te mekameka me te matotoru 16 me te teitei 80: B=15*16*2+12 .5*16*2=880mm2F=980*880=862400N Tātaitanga mekameka me te matotoru 16 me te teitei 120: B=23. 5*16*2+22. 5*16*2=1472mm2F=980*1472=1442560N