Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Majid Reza Ayatollahi"'
Publikováno v:
Polymers, Vol 15, Iss 11, p 2454 (2023)
In this research, the fracture behavior of brittle specimens weakened by V-shaped notches with end holes (VO-notches) is studied. First, an experimental investigation is conducted to evaluate the effect of VO-notches on fracture behavior. To this end
Externí odkaz:
https://doaj.org/article/3d4327547f634ff29f0b7e082c53fb23
Publikováno v:
Materials, Vol 15, Iss 10, p 3661 (2022)
Spruce wood (Picea Mariana) is a highly orthotropic material whose fracture behavior in the presence of U-shaped notches and under combined tensile-tearing loading (so-called mixed-mode I/III loading) is analyzed in this work. Thus, several tests are
Externí odkaz:
https://doaj.org/article/d5f1bd6384a242e1b24f2500c50051e4
Autor:
Alireza Akhavan-Safar, Ana Queirs Barbosa, Lucas Filipe Martins da Silva, Majid Reza Ayatollahi
Publikováno v:
Frattura ed Integrità Strutturale, Vol 12, Iss 46, Pp 266-274 (2018)
In this work, the effects of natural particles on the micro failure mechanisms and static strength of an epoxy are studied using scanning electron microscope (SEM) technique. To this end, bulk specimens and adhesively bonded single lap joints (SLJs)
Externí odkaz:
https://doaj.org/article/806dff1bea1f432cae6e8aae3b865c42
Publikováno v:
Polymers, Vol 13, Iss 17, p 3017 (2021)
This paper gathers experimental and theoretical investigations about both the geometry-dependent fracture initiation angle and the fracture strength in VO-notched polymethyl methacrylate (PMMA) specimens under mode I loading conditions. The numerical
Externí odkaz:
https://doaj.org/article/89868587c6d5435fb7d1e6fcf364f61e
Publikováno v:
Frontiers in Materials, Vol 6 (2019)
One of the common issues that occur after total knee replacement surgery is the aseptic loosening. The problem usually occurs after about 15 years from the surgery. The destructive effects of residual particles due to wear, the stress shielding effec
Externí odkaz:
https://doaj.org/article/3ef591e81b8d40dfa17b9bb8f4a58fe3
Publikováno v:
Polymers, Vol 13, Iss 7, p 1057 (2021)
This paper attempts to validate the application of the Virtual Isotropic Material Concept (VIMC) in combination with the average strain energy density (ASED) criterion to predict the critical load in notched laminated composites. This methodology was
Externí odkaz:
https://doaj.org/article/d0e1f8979cb24e1bb475bf3ba5ee11aa
Publikováno v:
Applied Sciences, Vol 10, Iss 23, p 8445 (2020)
This paper analyzes the notch effect on the fracture behavior of two biomaterials (a brittle bone cement and a ductile dental material) under mode I loading. U-notched Brazilian disk (UNBD) specimens of both materials were tested under remote compres
Externí odkaz:
https://doaj.org/article/a50bdea335af4ce79482e229e3a1b5fe
Autor:
Seyed Saeid Rahimian Koloor, Atefeh Karimzadeh, Noorfaizal Yidris, Michal Petrů, Majid Reza Ayatollahi, Mohd Nasir Tamin
Publikováno v:
Polymers, Vol 12, Iss 1, p 157 (2020)
Composite structures are made of multidirectional (MD) fiber-reinforced polymer (FRP) composite laminates, which fail due to multiple damages in matrix, interface, and fiber constituents at different scales. The yield point of a unidirectional FRP co
Externí odkaz:
https://doaj.org/article/4b1253abe7ae4aa8883c4054d0394f0b
Autor:
Atefeh Karimzadeh, Majid Reza Ayatollahi, Seyed Saeid Rahimian Koloor, Abd Razak Bushroa, Mohd Yazid Yahya, Mohd Nasir Tamin
Publikováno v:
Polymers, Vol 11, Iss 10, p 1571 (2019)
Despite wide industrial applications of Bis-GMA polymer, very few studies are available about the material classification, mechanical properties, and behavior of this material. In this study, the compressive behavior of Bis-GMA polymer was studied us
Externí odkaz:
https://doaj.org/article/e7fc71d8dcdc4a16bcced5a83917f1c0
Publikováno v:
علوم و تکنولوژی پلیمر, Vol 25, Iss 4, Pp 315-322 (2012)
The nanoscale fracture behavior of epoxy-based nanocomposites reinforced with double-walled carbon nanotube (DWNT) was investigated by molecular dynamics (MD) simulations technique. In order to prepare a nanocomposite model including polymer and DWNT
Externí odkaz:
https://doaj.org/article/7ecaf92232e34706b22e202e62be3b11