Zobrazeno 1 - 10
of 359
pro vyhledávání: '"Lennart, Larsson"'
Autor:
Hjalmar Staf, Per-Lennart Larsson
Publikováno v:
Applied Sciences, Vol 13, Iss 22, p 12296 (2023)
Finite element (FE) simulations are frequently used nowadays in order to analyse powder compaction and sintering, for example, when determining the shape of a cutting blank insert. Such analyses also make it possible to determine in detail the stress
Externí odkaz:
https://doaj.org/article/64a083a6999e4ef6ac60cf0d42c6982d
Publikováno v:
Crystals, Vol 13, Iss 6, p 926 (2023)
During unloading, pressed hard metal powder compacts expand (spring back), leading to unwarranted tensile stresses and, subsequently, crack initiation in the green body. Here, the elastic spring back and the green strength are analyzed for different
Externí odkaz:
https://doaj.org/article/6839b0ec08e646ceb438328de407a9ac
Publikováno v:
Crystals, Vol 13, Iss 6, p 978 (2023)
The densification of cemented carbides during sintering was studied using an existing constitutive model based on powder particle size and material composition. In the present analysis, we study how well the constitutive model can capture the experim
Externí odkaz:
https://doaj.org/article/958f1112c9774603b8861f6d649e7640
Autor:
Pascal Forquin, Mahdi Saadati, Dominique Saletti, Bratislav Lukic, Federico Schiaffini, Kenneth Weddfelt, Per-Lennart Larsson
Publikováno v:
Applied Sciences, Vol 12, Iss 22, p 11621 (2022)
In the present study, dynamic experiments are developed to investigate the induced damage modes when Lingulid sandstone is subjected to dynamic and impact loading. To do so, a series of spalling tests were carried out in order to investigate the mate
Externí odkaz:
https://doaj.org/article/98c1408a8e9343bea7b13d2954067c7f
Autor:
Pascal Forquin, Mahdi Saadati, Dominique Saletti, Bratislav Lukic, Frederico Schiaffini, Kenneth Weddfelt, Per-Lennart Larsson
Publikováno v:
Applied Sciences, Vol 12, Iss 21, p 10806 (2022)
A constitutive model able to describe both tensile damage and plastic deformation under confinement is a prerequisite to numerically simulate the behaviour of sandstone rock under an impact loading induced in a percussive drilling process. Therefore,
Externí odkaz:
https://doaj.org/article/9d95eac28096402ea7da23dd848a26cb
Autor:
Per-Lennart Larsson
Publikováno v:
Lubricants, Vol 10, Iss 6, p 121 (2022)
Correlation of sharp contact problems is investigated with the focus on rigid-plastic contact behavior pertinent to engineering metals and alloys. The aim is to determine relations between the contact hardness and constitutive parameters suitable for
Externí odkaz:
https://doaj.org/article/33cfc5dd84fa46e8afc42da27f051f0f
Publikováno v:
Lubricants, Vol 9, Iss 3, p 29 (2021)
Correlation of sharp indentation problems is examined theoretically and numerically. The analysis focuses on elastic-plastic pressure-sensitive materials and especially the case when the local plastic zone is so large that elastic effects on the mean
Externí odkaz:
https://doaj.org/article/70ab66e2793f4d609946e676ff5cca9c
Publikováno v:
Lubricants, Vol 8, Iss 12, p 106 (2020)
The rock fragmentation response to drilling, in particular percussive drilling, is important in order to improve the efficiency of such an operation. The resulting problem includes spherical contact between the drill bit and the material and therefor
Externí odkaz:
https://doaj.org/article/cb9a238820544301a529b9b5f6fb9e83
Publikováno v:
Journal of Materials Engineering and Performance. 30:9078-9083
The correlation between granule strength and green strength of hard metal powders is examined. The approach is based on experiments and numerics. In the latter case, a Design of Experiment software is used. The granule strength of the powder (particl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5851865d8b8fea5633832dac9fbc3943
https://doi.org/10.1007/s11665-021-06089-1
https://doi.org/10.1007/s11665-021-06089-1
Publikováno v:
Journal of Materials Engineering and Performance. 30:2545-2551
The relation between pressing energy and green strength is examined experimentally and numerically using a commercially available design of experiment (DOE) software, at compaction of five hard metal powder materials. This is of substantial practical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98f5ee74f4cf3b97b697ce2936891c2e
https://doi.org/10.1007/s11665-021-05588-5
https://doi.org/10.1007/s11665-021-05588-5