Question

150A 4. A machine element is subjected to the following respective maximum and minimum stress states (all values are in MPa): nt Name: Minimum: Maximum: 800 200 -150 -600 -300 500 -150 200 The endurance limit for the machine elements when corrected for all of its Marin factors is 925 MPa. Please determine the life of the machine element nder this load assuming a finite life and using Goodman line equation. Ote: The state of stress is two dimensional but multi-axial, therefore, you ed to use Von Misses equivalent stress. amplitnde & the mea [st Campute the state ct Stress mmes ut the

Answer 1

Maciumum Maniuuun 6n=-60 Gn=8.00 -3 2-00 aeing ui vateut strees Vou mies es 2. t 6 2 Gu-6 Ge = 2 altesnate nltrees in x dse ducetion Neau alhers n 8o01600 100 mpa (Pop-Lom) MPa 2 2 dueilisn Yaie alluu ate Stuees in y Heau elees iu 4 00 MPa Meau shear elrees 20n -150)- HPa alttsnati ebree Za)my 20n-150) 2 Gwk t Guy 6me 144 2 + 3 x 252 100t100-100 6me me 108.97 MPe

SGai 2 6ae Sau Cay t Gae 2 4 00 (θωχέιο) 3X175 6ae= 79.6 M Pa Cnian) 925 Se 679.61 Sat 108097 B lies in riole) line Cekandy Snfinut Aife yrad the ntees state mau will haue Machine llew eut the S0 Anfenete Rife e ) Se bap -Se 925 649.61-6a0 N