WorldCat Identities

Kunc, Robert

Overview
Works: 122 works in 152 publications in 2 languages and 177 library holdings
Genres: Educational films  Instructional films 
Roles: Author, Thesis advisor, Other
Publication Timeline
.
Most widely held works by Robert Kunc
Secrets of job search( Visual )

1 edition published in 2009 in English and held by 11 WorldCat member libraries worldwide

Uporabniku varnejši cestno prometni sistemi : vmesno poročilo o rezultatih raziskovalnega projekta v obdobju od 21.11.2000 do 20.05.2001( Book )

6 editions published between 1999 and 2002 in Slovenian and held by 6 WorldCat member libraries worldwide

Opisna geometrija : potrebna znanja za pravilno risanje - osnove tehničnega risanja by Ivan Prebil( Book )

1 edition published in 2011 in Slovenian and held by 5 WorldCat member libraries worldwide

Določitev malociklične nosilnosti kotalnega stika = Determination of low cycle carrying capacity of rolling contact by Robert Kunc( )

2 editions published between 1998 and 1999 in Slovenian and held by 3 WorldCat member libraries worldwide

The carrying capacity of large axial bearings with surface hardened raceway is usually given with the maximal permissible force on the rolling element with the highest load. The established criteria of the maximal premissible plastic deformation of the raceway, and the maximal allowed subsurface stress on the hardened layer boundary give widely varying values for the carrying capacity of the rolling contacts. On the models of bearing raceways from 42CrMo4 and C45 steels we have determined the cyclic curves (force - deformation), the limit of fast increase in (elastic and plastic) deformation gradient, and the size of the contact surface. The sub surface stresses were simultaneously checked using a FEM model and considering the material nonlinearities
Dinamika upravljanja in vožnje terenskih vozil : poročilo o rezultatih raziskovalnega projekta v obdobju od 16.11.2000 do 15.11.2001( Book )

3 editions published between 2001 and 2002 in Slovenian and held by 3 WorldCat member libraries worldwide

Malociklična nosilnost pri ležajih z utrjeno kotalno površino = Low cycle carrying capacity of bearings with hardened rolling layer by Robert Kunc( )

2 editions published between 1997 and 1998 in Slovenian and held by 3 WorldCat member libraries worldwide

V prispevku je obravnavan problem dejanske nosilnosti kotalnega stika pri velikih aksialnih ležajih s površinsko utrjeno tečino. Nosilnost takih ležajev je navadno določena z največjo dopustno stično silo na najbolj obremenjenem kotalnem elementu. Znani merili za dopustno plastično deformacijo tečine in dopustno podpovršinsko napetost na meji kaljene plasti podajata zelo različne vrednosti za dovoljeno nosilnost kotalnega stika. Z namenom, da ugotovimo dejansko nosilnost kotalnega stika pri aksialnih ležajih z majhno vrtilno hitrostjo, če je upoštevana lastnost osnovnega materiala, trdota in debelina kaljene plasti ter geometrija kotalnega stika, smo izvedli meritve na modelih ležajnih tečin iz materiala 42CrMo4 in C45. Obremenjevanje stika je bilo statično in malociklično. Ugotovljene so bile ciklične krivulje (sila - raztezek), meja, pri kateri začne naraščati gradient deformacije (elastično-plastična), in velikost stične površine. Kontrolo podpovršinskih napetosti smo opravili istočasno z eksperimentom na identičnem modelu MKE, ki upošteva nelinearnost modela. Na osnovi rezultatov meritev in izračuna modela MKE želimo izpeljati poenostavljeno matematično zvezo, ki ob upoštevanju lastnosti utrjenega in osnovnega materiala ter geometrijskega modela kotalnega stika poda dopustno stično silo
Malociklična nosilnost tečine ležaja z utrjeno kotalno površino = [Low cycle carrying capacity for bearing raceway with hardened rolling surface] : doktorsko delo by Robert Kunc( Book )

1 edition published in 2002 in Slovenian and held by 3 WorldCat member libraries worldwide

The determination of the actual carrying capacity of the rolling contact in low speed axial bearings with the established standardised criteria did not give satisfactory results. An exploitation of large axial bearings also includes some load peaks, which cause permanent deformation of rolling contact. The plastic strain of base material under the hardened rolling layer starts to grow. The consequence may be micro cracks on the edge of the hardened layer or also pealing of the hardened layer. Because of that we have used a constitutive damage model for a determination subsurface strain stress relationship. The model includes isotropic and kinematic hardening or softening and growth of damage with growth of oscillation. For a established numerical material model we have determined the material parameters of a bearings ring with a help of various experimental low cycle tests. We have integrated the damage model into a numerical computation with finite element model where the simulation of the contact of the raceway and rolling element on the cyclic loading has been done. The comparison of experimental and numerical results confirmed use of an established model for the determination of the actual carrying capacity of the rolling contact in low speed axial bearings
Materiali in nosilnost velikih kotalnih ležajev = Materials and carrying capacity of large rolling bearings by Robert Kunc( )

2 editions published between 1999 and 2000 in Slovenian and held by 3 WorldCat member libraries worldwide

Za določitev nosilnosti kotalnega stika velikih aksialnih ležajev z majhno vrtilno hitrostjo so bile izvedene meritve na modelih ležajnih tečin, izdelanih iz materiala 42CrMo4 in C45 (ISO 683/1). Upoštevana je bila lastnost osnovnega materiala ležajnega obroča, trdota in globina kaljene plasti tečine ter geometrija stika. Obremenjevanje stika je bilo malociklično. Določene so bile malociklične krivulje ter meja in gradient rasti deformacije stika. Istočasno z eksperimentom je bil numerično, z metodo končnih elementov preverjen potek podpovršinskih napetosti. Upoštevane so bile eksperimentalno določene malociklične materialne lastnosti ležajnih obročev
Verification of numerical determination of carrying capacity of large rolling bearings with hardened raceway by Robert Kunc( )

2 editions published between 2006 and 2007 in English and held by 2 WorldCat member libraries worldwide

For the purpose of the numerical analysis of the actual carrying capacity of rolling contacts in large rolling bearings with surface-hardened raceways, an elasto-plastic constitutive model was used which links the mechanics of material damage with the isotropic and kinematic hardening or softening. A damage material model, implemented into a commercial finite element program, allows us to monitor the elastic strain, plastic strain increase, stress changes and material damage growth, which are closely related to the number ofload cycles. In this way, the location and the time of occurrence of bearing raceway damage can be determined along with the growth of damage up to the point when a microcrack is formed. In other words, low cycle life of rotational rolling connection can be assessed. The paper presents the material model, numerical analysis of the actual carrying capacity of the rolling contact in single-row ball bearings and the verification of the numerical material model with experimental results of low cycle carrying capacity
Fenomen tečenja v konstitutivnih modelih ciklične plastifikacije : doktorsko delo by Andrej Žerovnik( Book )

1 edition published in 2010 in Slovenian and held by 2 WorldCat member libraries worldwide

Nosilnostni kriteriji pri ležajih z utrjeno kotalno površino : magistrsko delo by Robert Kunc( Book )

1 edition published in 1999 in Slovenian and held by 2 WorldCat member libraries worldwide

Naloga z naslovom "Nosilnostni kriteriji za ležaje z utrjeno kotalno površino" je zasnovana na rešitvi realne malociklične nosilnosti kotalnega stika vrtljive zveze z upoštevanjem vseh parametrov kotalnega stika vrtljive zveze. Ker uveljavljena kriterija za določitev dopustne stične sile glede na dopustno trajno deformacijo in dopustno podpovršinsko napetost na meji kaljene plasti ne ustrezata primeru površinsko utrjene tečine, smo izdelali preizkušance ležajnih obročev in numerični model kotalnega stika. Z eksperimentom smo določili velikost trajne deformacije tečine v odvisnosti od stične sile. S primerjanjem rezultata trajne deformacije eksperimenta in numeričnega preračuna modela končnih elementov, pri katerem upoštevamo eksperimentalno določeno malociklično o-e krivuljo materiala, opazimo odstopanje obeh rezultatov. Posledica je v intenzivni začetni rasti trajne deformacije eksperimenta. Numerični preračun podpovršinskih napetosti podaja strogost napetostnega kriterija oziroma problematiko tehnologije površinskega utrjevanja tečine. Z ustrezno debelino in trdoto kaljene plasti so dopustne stične sile različnih kriterijev primerljive. Dobljeni rezultati potrjujejo pravilnost iskanja realne dopustne stične sile kotalnega stika v prihodnosti
Uporabniku varnejši cestno prometni sistemi : raziskovalni projekt( Book )

2 editions published in 2000 in Slovenian and held by 2 WorldCat member libraries worldwide

Izvedba deformacijsko napetostne analize enostavnega nosilca in palične konstrukcije s pomočjo programskega paketa MD Patran : učno gradivo by Matej Zupin( Book )

1 edition published in 2010 in Slovenian and held by 2 WorldCat member libraries worldwide

Vpliv položaja prsnega koša na gibanje in obremenitev vratne hrbtenice v fazi trka : doktorsko delo by Senad Omerović( Book )

1 edition published in 2016 in Slovenian and held by 2 WorldCat member libraries worldwide

Whiplash injuries to the cervical spine represent a considerable economic burden on society with medical conditions, in some cases persisting for more than a year. Numerous studies of whiplash injuries have been made for occupant normal seated position, leaving the analysis of neck injuries for out-of-normal positions not well documented. For that purpose, a detailed human cervical spine finite element model was developed. The analysis was made for four most common occupant seated positions, such as: Normal Position with the torso against the seat back and the head looking straight ahead, Torso Lean forward position with the torso away from the seat back for approximately 10°, Head Flexed position with the head flexed forward approximately 20° from the normal position and Head-Flexed with Torso Lean forward position with the head flexed forward approximately 20° and torso 10° from the normal position. The comparative study included the analysis of capsular ligament deformation and the level of S-curvature of the cervical spine. The developed numerical model predicted that Head Flexed seated position and Head-Flexed with Torso Lean forward seated position are most threatening for upper and lower cervical spine capsular ligament respectively. As for the level of S-curvature, the numerical model predicted that Head-Flexed with Torso Lean forward seated position would be most prone to neck injuries associated with it. This study demonstrated that the occupant seated position has a significant influence on potential whiplash injuries. With the use of developed numerical model further investigation of whiplash injury mechanism is possible enabling better occupant%s protection
Automation of LCF material model parameters' identification( )

2 editions published in 2010 in English and held by 2 WorldCat member libraries worldwide

Modeling of material behaviour has significant influence on design and optimiyation of mechanical structures and consequently calculation of their lifetime. When using complex constitutive material model that describes elastic-plastic behaviour of the cyclically loaded material and takes into account damage occurrence and accumulation, the process of parameter identification from experimental data is very complex and time-consuming. In this paper the damage occurrence and accumulation within the material are described by means of models of Bauschinger effect, kinematic and isotropic hardening (or softening) according to Chaboche material model and mean stress relaxation according to Ohno-Wang material model. Since the material model is highly non-linear, its parameter identification requires complex numerical procedures, carefully chosen algorithms and numerical operators, followed by software solution development. The developed automated system for material model parameter identification is validated by comparing the calculated with experimental response of the material. Its usage can make material behaviour modeling for numerous materials accurate, fast and user-friendly
Pasivna in aktivna varnost vozil by Gašper Šušteršič( )

6 editions published in 2012 in Slovenian and held by 0 WorldCat member libraries worldwide

Finomehanika by Robert Kunc( )

6 editions published in 2011 in Slovenian and held by 0 WorldCat member libraries worldwide

 
moreShow More Titles
fewerShow Fewer Titles
Audience Level
0
Audience Level
1
  Kids General Special  
Audience level: 0.78 (from 0.19 for Secrets of ... to 0.98 for Izvedba de ...)

Languages