Blar i NTNU Open på forfatter "Sas, Gabriel"
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Biochar-Added Cementitious Materials—A Review on Mechanical, Thermal, and Environmental Properties
Mensah, R.A.; Shanmugam, Vigneshwaran; Narayanan, Sreenivasan; Razavi, Seyed Mohammad Javad; Ulfberg, Adrian; Blanksvärd, Thomas; Sayahi, Faez; Simonsson, Peter; Reinke, Benjamin; Försth, Michael; Sas, Gabriel; Sas, Daria; Das, Oisik (Peer reviewed; Journal article, 2021)The enhanced carbon footprint of the construction sector has created the need for CO2 emission control and mitigation. CO2 emissions in the construction sector are influenced by a variety of factors, including raw material ... -
Circular economy in biocomposite development: State-of-the-art, challenges and emerging trends
Shanmugam, Vigneshwaran; Mensah, Rhoda Afriyie; Försth, Michael; Sas, Gabriel; Restás, Ágoston; Addy, Cyrus; Xu, Qiang; Jiang, Lin; Neisiany, Rasoul Esmaeely; Singha, Shuvra; George, Gejo; Jose E, Tomlal; Berto, Filippo; Hedenqvist, Mikael S; Das, Oisik; Ramakrishna, Seeram (Peer reviewed; Journal article, 2021)Biocomposites being environmentally-friendly alternative to synthetic composites are gaining increasing demand for various applications. Hence, biocomposite development should be integrated within a circular economy (CE) ... -
Efficient Improvement in Fracture Toughness of Laminated Composite by Interleaving Functionalized Nanofibers
Razavi, Seyed Mohammad Javad; Esmaeely neisiany, Rasoul; Razavi, Moe; Fakhar, Afsaneh; Shanmugam, Vigneshwaran; Alagumalai, V; Försth, Michael; Sas, Gabriel; Das, Oisik (Journal article; Peer reviewed, 2021)Functionalized polyacrylonitrile (PAN) nanofibers were used in the present investigation to enhance the fracture behavior of carbon epoxy composite in order to prevent delamination if any crack propagates in the resin rich ... -
Experimental Investigation of Thrust Force, Delamination and Surface Roughness in Drilling Hybrid Structural Composites
Shanmugam, Vigneshwaran; Marimuthu, Uthayakumar; Rajendran, Sundarakannan; Veerasimman, Arumugaprabu; Mahaboob Basha, A; Bin Abdul Majid, MS; Esmaeely neisiany, Rasoul; Försth, Michael; Sas, Gabriel; Razavi, Seyed Mohammad Javad; Das, Oisik (Peer reviewed; Journal article, 2021)Filled hybrid composites are widely used in various structural applications where machining is critical. Hence, it is essential to understand the performance of the fibre composites’ machining behaviour. As such, a new ... -
Impact response and damage tolerance of hybrid glass/kevlar-fibre epoxy structural composites
Alagumalai, Vasudevan; Shanmugam, Vigneshwaran; Balasubramanian, Navin Kumar; Krishnamoorthy, Yoganandam; Ganesan, Velmurugan; Försth, Michael; Sas, Gabriel; Berto, Filippo; Chanda, Avishek; Das, Oisik (Peer reviewed; Journal article, 2021)The present study is aimed at investigating the effect of hybridisation on Kevlar/E-Glass based epoxy composite laminate structures. Composites with 3 mm thickness and 16 layers of fibre (14 layers of E-glass centred and ... -
Influence from Asperities - Modelling of Laboratory Test
Steen, Sigurd Sætherø (Master thesis, 2017)Traditional stability analysis of concrete dams is based on the Mohr-Coulomb failure criteria with a peak friction angle to find the shear capacity. The peak friction angle is often in the range between 40 and 50 degrees, ... -
Influence of concrete’s mechanical properties on the cracking of concrete dams
Ulfberg, Adrian; Seger, Andreas; Bista, Dipen; Wilde, Marie Westberg; Johansson, Fredrik; Das, Oisik; Sas, Gabriel (Chapter, 2021)Analytical methods of structural stability assessment of concrete dams are often too simple and thus conservative in their predictions.Without the actual foundation geometry, capacity for some rigid body failure modes are ... -
Influence of large-scale asperities on the shear strength of concrete-rock interface of small buttress dams
Sas, Gabriel; Popescu, Cosmin; Bista, Dipen; Seger, Andreas; Arntsen, Bård (Peer reviewed; Journal article, 2021)This paper presents an investigation of the influence of large-scale asperities on the shear strength of four physical models of a pillar (also known as buttress web)from Kalhovd dam in Norway. The objective was to observe ... -
Influence of large-scale asperities on the stability of concrete dams
Ulfberg, Adrian; Jaime, Gonzales-Libreros; Das, Oisik; Sas, Gabriel; Andersson, Erik; Bista, Dipen; Arntsen, Bård; Seger, Andreas (Chapter, 2022)For concrete dams founded on rock, there are only a few options in the common analysis methods to account for large‐scale asperities. However, previous research alludes that they have a significant impact on the behaviour ... -
Influence of location of large-scale asperity on shear strength of concrete-rock interface under eccentric load
Bista, Dipen; Sas, Gabriel; Johansson, Fredrik; Lia, Leif (Peer reviewed; Journal article, 2020)The location and geometry of large-scale asperity present at the foundation of concrete gravity dams and buttress dams affect the shear resistance of the concrete-rock interface. However, the parameters describing the ... -
Optimisation of Mechanical Properties in Saw-Dust/Woven-Jute Fibre/Polyester Structural Composites under Liquid Nitrogen Environment Using Response Surface Methodology
Ganesan, V; Shanmugam, Vigneshwaran; Kaliyamoorthy, B; Sanjeevi, S; Shanmugam, SK; Alagumalai, V; Krishnamoorthy, Y; Försth, Michael; Sas, Gabriel; Razavi, Seyed Mohammad Javad; Das, Oisik (Journal article; Peer reviewed, 2021)Natural fibre-based composites are replacing traditional materials in a wide range of structural applications that are used in different environments. Natural fibres suffer from thermal shocks, which affects the use of ... -
Probabilistic finite element analysis of failures in concrete dams with large asperities in the rock–concrete interface
Ulfberg, Adrian; Gonzalez-Libreros, Jaime; Das, Oisik; Bista, Dipen; Westberg Wilde, Marie; Johansson, Fredrik; Sas, Gabriel (Peer reviewed; Journal article, 2023)Common analytical assessment methods for concrete dams are unlikely to predict material fracture in the dam body because of the assumption of rigid body behavior and uniform- or linear stress distribution along a predetermined ... -
Stabilitet av betongdammer - Ruhetens påvirkning på skjærkapasiteten mellom betong og berg
Liahagen, Simen Alexander (Master thesis, 2012)Skjærkapasiteten mellom betong og fundament i dammer beregnes i dag ofte med det lineære Mohr-Coulomb-kriteriet. Dette er et empirisk kriteriet som er forholdsvis enkelt å benytte mye på grunn av dets enkle oppbygning og ...