Shumilo A. Determination of fatigue strength and providing of longevity of parts of machines by the regime of loading

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0408U001546

Thesis Registration Form

0408U001546.pdf

Applicant for

Specialization

  • 05.02.02 - Машинознавство

14-03-2008

Specialized Academic Board

Д 41.052.02

Odessa National Polytechnic University

Essay

This is devoted to a pressing problem of determination of resistance of fatigue and providing of longevity of parts on the regime of loading and for the realization of expert esti-mation of their breakages from a fatigue. Here I confirm the correctness of using a linear hypothesis of summing up the fatigue defects to determine the bound damage by the indi-vidual fatigue curve for a separate machine part on basis of relations among its parameters. Method of substituting the factual multistep regime by an equivalent two-step one is developed to eliminate the effects of fatigue damage low bound on division accuracy of loading spectrum as to dam-aging and undamaging parts. Here is given the improve-ment of mathematical model of fatigue curve: I offer to use the fatigue curve of a new form where the left section is with power function while the right section is with Weybull function. Method of determining fatigue limit correspond-ing best of all to operating time and loading conditions of the part on base of a new fatigue curve and an equivalent twostep regime has been developed. For optimum choice of material according to reasonable strength levels, the statisti-cal theory of similarity of fatigue damage way be used.

Read more

Files

Aref.doc

PRILOZENIYA--ACT_1.tif

PRILOZENIYA--ACT_2.tif

PRILOZENIYA--ACT_3.tif

PRILOZENIYA--Prilozenie_А.doc

PRILOZENIYA--Prilozenie_В.doc

PRILOZENIYA--Prilozenie_Д.doc

PRILOZENIYA--Prilozenie_З.doc

PRILOZENIYA--Prilozenie_К.doc

PRILOZENIYA--Prilozenie_Л.doc

PRILOZENIYA--Prilozenie_М.doc

PRILOZENIYA--Prilozenie_П.doc

PRILOZENIYA--Prilozenie_Р.doc

PRILOZENIYA--prilozenie_Б.doc

PRILOZENIYA--prilozenie_Ж.doc

PRILOZENIYA--prilozenie_Н.doc

RAZDEL_1.doc

RAZDEL_2.DOC

RAZDEL_3.doc

RAZDEL_4.doc

SODERZANIE.doc

SPISOK_LITERA.doc

TABL_3_2.DOC

TABL_3_3.DOC

TABL_3_4.DOC

TABL_3_5_6.DOC

TITUL.doc

VVEDENIE.doc

VYVODY.doc

ris_4_11.doc

ris_4_6.doc

ris_4_8.doc

Similar theses

0521U102117

Polishchuk Mykhaylo Mykolaiovych

Automated synthesis of mobile robots of arbitrary orientation in the technological space

0521U101510

Bereziuk Oleh V.

Scientific and technical basis for designing highly efficient working bodies of machines for collecting and primary processing of municipal solid waste

0421U101896

Sukov Maksym Gennadiyovych

Substantiation of parameters of large-wave wave gears of drives of powerful machines

0421U101076

Pyliavets Volodymyr

Adaptive hydraulic system with cross link for mobile machines

0421U101069

Zilinskyi Andrii I.

Ultrasonic cavitation filter with self-cleaning effect for liquid media