Professor Ashraf Osman's Outputs (73)

Weather Impact on DER Long-term Performance: A Formal Verification Approach (2025)
Presentation / Conference Contribution
Santana, M. A., Stefanakos, I., Fang, X., Garg, A., Sun, H., & Osman, A. (2024, November). Weather Impact on DER Long-term Performance: A Formal Verification Approach. Presented at 2024 IEEE PES Innovative Smart Grid Technologies - Asia (ISGT Asia), Bangalore, India

Distributed energy resources (DERs), such as solar photovoltaic (PV) panels, are essential to modern energy systems, providing resilience and producing clean, local energy. However, their long-term performance is vulnerable to environmental factors,... Read More about Weather Impact on DER Long-term Performance: A Formal Verification Approach.

A 3D material point discretization approach for complex terrain and geological body: Numerical implementation and application (2024)
Journal Article
You, Y., Yang, J., Zheng, X., Xie, Y., Lyu, J., & Osman, A. S. (2025). A 3D material point discretization approach for complex terrain and geological body: Numerical implementation and application. Computers and Geotechnics, 177, Article 106884. https://doi.org/10.1016/j.compgeo.2024.106884

The construction of three-dimensional numerical models for complex terrains and geological bodies has always posed a challenge in geoengineering. This study introduces an efficient discretization approach that facilitates the establishment of materia... Read More about A 3D material point discretization approach for complex terrain and geological body: Numerical implementation and application.

Approximate upper- and lower-bound analyses of translational rainfall-induced landslides in curvilinear hillslopes (2024)
Journal Article
Zhang, L., Zhang, W., Wang, Y., & Osman, A. (online). Approximate upper- and lower-bound analyses of translational rainfall-induced landslides in curvilinear hillslopes. Géotechnique, 1-13. https://doi.org/10.1680/jgeot.23.00263

Increased frequency of rainfall-induced landslides (RILs) with global climate change is expected to be a huge challenge. Previous studies have focused on RILs encompassing the examination of rotational failure mechanisms and straightforward slope geo... Read More about Approximate upper- and lower-bound analyses of translational rainfall-induced landslides in curvilinear hillslopes.

Effect of soil stiffness on end bearing resistance of foundations in clay from large deformation numerical modelling (2024)
Journal Article
Zhou, S., Zhang, W., & Osman, A. S. (2024). Effect of soil stiffness on end bearing resistance of foundations in clay from large deformation numerical modelling. Computers and Geotechnics, 173, Article 106515. https://doi.org/10.1016/j.compgeo.2024.106515

Accurately predicting the installation resistance is of great benefit to a rational and economical design of foundations. This research performs a large-deformation finite-element analysis to investigate the effect of soil stiffness on the end bearin... Read More about Effect of soil stiffness on end bearing resistance of foundations in clay from large deformation numerical modelling.

Estimate end bearing resistance of a circular foundation using small strain and large deformation finite element modelling (2024)
Presentation / Conference Contribution
Zhou, S., Zhang, W., & Osman, A. (2024, April). Estimate end bearing resistance of a circular foundation using small strain and large deformation finite element modelling. Presented at 2024 UK Association for Computational Mechanics Conference, Durham, UK

Accurately predicting the end bearing resistance of the foundation is important for its design and application. This research compares the results of a circular foundation end bearing resistance in uniform clay from small strain finite-element (SSFE)... Read More about Estimate end bearing resistance of a circular foundation using small strain and large deformation finite element modelling.

A fully coupled dynamic water-mooring line system: Numerical implementation and applications (2024)
Journal Article
Zheng, X., Seaid, M., & Osman, A. S. (2024). A fully coupled dynamic water-mooring line system: Numerical implementation and applications. Ocean Engineering, 294, Article 116792. https://doi.org/10.1016/j.oceaneng.2024.116792

Several numerical challenges exist in the analysis of water-mooring line systems which require robust, yet practical, methods to address this type of fully coupled nonlinear dynamic problems. The present study proposes a novel class of numerical tech... Read More about A fully coupled dynamic water-mooring line system: Numerical implementation and applications.

Towards an error indicator-based h -adaptive refinement scheme in kinematic upper-bound limit analysis with the presence of seepage forces (2023)
Journal Article
Zheng, X., Qin, A., Yang, F., Wang, S., Yang, J., & Osman, A. (2024). Towards an error indicator-based h -adaptive refinement scheme in kinematic upper-bound limit analysis with the presence of seepage forces. Computers and Geotechnics, 166, Article 106005. https://doi.org/10.1016/j.compgeo.2023.106005

A material point/finite volume method for coupled shallow water flows and large dynamic deformations in seabeds (2023)
Journal Article
Zheng, X., Seaid, M., Pisanò, F., Hicks, M. A., Vardon, P. J., Huvaj, N., & Osman, A. S. (2023). A material point/finite volume method for coupled shallow water flows and large dynamic deformations in seabeds. Computers and Geotechnics, 162(October), Article 105673. https://doi.org/10.1016/j.compgeo.2023.105673

A hybrid material point/finite volume method for the numerical simulation of shallow water waves caused by large dynamic deformations in the bathymetry is presented. The proposed model consists of coupling the nonlinear shallow water equations for th... Read More about A material point/finite volume method for coupled shallow water flows and large dynamic deformations in seabeds.

An Apparatus to Monitor Suction Evolution and Water Migration within a Soil Mass for Climate-Adaptive Infrastructure (2023)
Presentation / Conference Contribution
Rana, A., Kumar Sharma, A., Kumar, A., Azizi, A., Muguda, S., Osman, A., & Toll, D. G. (2023, July). An Apparatus to Monitor Suction Evolution and Water Migration within a Soil Mass for Climate-Adaptive Infrastructure. Presented at Geo-Risk 2023, Arlington, Virginia

The present study investigates the potential utility of a capillary barrier system that limits water infiltration into the underlying soil. This was achieved by developing a cylindrical apparatus capable of monitoring matric suction and water content... Read More about An Apparatus to Monitor Suction Evolution and Water Migration within a Soil Mass for Climate-Adaptive Infrastructure.

Installation performance of structurally enhanced caissons in sand (2023)
Journal Article
Mehravar, M., Osman, A., Harireche, O., Faramarzi, A., Rahimzadeh, F., & Dirar, S. (2023). Installation performance of structurally enhanced caissons in sand. Computers and Geotechnics, 159, Article 105464. https://doi.org/10.1016/j.compgeo.2023.105464

Suction caissons are attractive solutions to support offshore structures. Their capacity, both pull-out and bearing, grows with their embedment depth. However, higher embedment depths increase risks of installation failure due to uncertainty of seabe... Read More about Installation performance of structurally enhanced caissons in sand.

Application of geographical information system (GIS) using artificial neural networks (ANN) for landslide study in Langat Basin, Selangor (2022)
Journal Article
Selamat, S. N., Majid, N. A., Taha, M. R., & Osman, A. (2022). Application of geographical information system (GIS) using artificial neural networks (ANN) for landslide study in Langat Basin, Selangor. IOP Conference Series: Earth and Environmental Science, 1064(1), https://doi.org/10.1088/1755-1315/1064/1/012052

The landslide was recognized as the most common geologic hazard around the world. The assessment of the relationship landslide conditioning factors is a critical step in managing landslide hazards and risks. Several models have been made to develop t... Read More about Application of geographical information system (GIS) using artificial neural networks (ANN) for landslide study in Langat Basin, Selangor.

Centrifuge modelling of an expansive clay profile using artificial fissuring to achieve realistic swell magnitudes in a short timeframe (2022)
Journal Article
Gaspar, T., Jacobsz, S., Smit, G., Gens, A., Toll, D., & Osman, A. (2023). Centrifuge modelling of an expansive clay profile using artificial fissuring to achieve realistic swell magnitudes in a short timeframe. Engineering Geology, 312, Article 106928. https://doi.org/10.1016/j.enggeo.2022.106928

This paper presents the results of a centrifuge study in which swell of an expansive clay profile was induced in the centrifuge. A factor which has previously hindered such research is the time required to induce significant swell in-flight, within a... Read More about Centrifuge modelling of an expansive clay profile using artificial fissuring to achieve realistic swell magnitudes in a short timeframe.

Measurement of pile uplift forces due to soil heave in expansive clays (2022)
Journal Article
da Silva Burke, T. S., Jacobsz, S., Elshafie, M. Z., & Osman, A. S. (2022). Measurement of pile uplift forces due to soil heave in expansive clays. Canadian Geotechnical Journal, 59(12), https://doi.org/10.1139/cgj-2021-0079

Piled foundations are widely used to limit the movement of foundations in expansive clays. These piles are subjected to large uplift forces as the clay swells (and downdrag forces when it shrinks). The appropriate method to estimate these forces is n... Read More about Measurement of pile uplift forces due to soil heave in expansive clays.

Landslide Susceptibility Model Using Artificial Neural Network (ANN) Approach in Langat River Basin, Selangor, Malaysia (2022)
Journal Article
Selamat, S. N., Majid, N. A., Taha, M. R., & Osman, A. (2022). Landslide Susceptibility Model Using Artificial Neural Network (ANN) Approach in Langat River Basin, Selangor, Malaysia. Land, 11(6), Article 833. https://doi.org/10.3390/land11060833

Landslides are a natural hazard that can endanger human life and cause severe environmental damage. A landslide susceptibility map is essential for planning, managing, and preventing landslides occurrences to minimize losses. A variety of techniques... Read More about Landslide Susceptibility Model Using Artificial Neural Network (ANN) Approach in Langat River Basin, Selangor, Malaysia.

The mechanical properties of a high plasticity expansive clay (2022)
Journal Article
Gaspar, T., Jacobsz, S., Heymann, G., Toll, D., Gens, A., & Osman, A. (2022). The mechanical properties of a high plasticity expansive clay. Engineering Geology, 303, https://doi.org/10.1016/j.enggeo.2022.106647

The mechanical properties of a high plasticity expansive clay from South Africa are reported. The experimental programme considered wetting after loading tests followed by one-dimensional consolidation and unloading of undisturbed and statically comp... Read More about The mechanical properties of a high plasticity expansive clay.

Rainfall induced deformation on unsaturated collapsible soils (2021)
Presentation / Conference Contribution
Moghaddasi, H., Osman, A., Toll, D., & Khalili, N. (2022, December). Rainfall induced deformation on unsaturated collapsible soils. Presented at Proceedings of the 4th International Conference on Transportation Geotechnics, Chicago, Illinois, on 23-26 May 2021

The stability of transportation infrastructure can be affected by seasonal rainfall infiltrated adjacent excavations and natural slopes. The paper investigates the rainfall-induced deformation of an anchored excavation constructed in unsaturated soil... Read More about Rainfall induced deformation on unsaturated collapsible soils.

Piling 2020 (2021)
Book
Higgins, K., Ainsworth, Y., Toll, D., & Osman, A. (Eds.). (2021). Piling 2020. ICE Publishing

A Computational Model for Simulation of Shallow Water Waves by Elastic Deformations in the Topography (2021)
Journal Article
Al-Ghosoun, A., Osman, A., & Seaid, M. (2021). A Computational Model for Simulation of Shallow Water Waves by Elastic Deformations in the Topography. Communications in computational physics, 29(4), 1095–1124. https://doi.org/10.4208/cicp.oa-2020-0098

We propose a coupled model to simulate shallow water waves induced by elastic deformations in the bed topography. The governing equations consist of the depth-averaged shallow water equations including friction terms for the water freesurface and the... Read More about A Computational Model for Simulation of Shallow Water Waves by Elastic Deformations in the Topography.

A hybrid finite volume/finite element method for shallow water waves by static deformation on seabeds (2020)
Journal Article
Al-Ghosoun, A., Osman, A., & Seaid, M. (2021). A hybrid finite volume/finite element method for shallow water waves by static deformation on seabeds. Engineering Computations, 38(5), 2434-2459. https://doi.org/10.1108/ec-05-2020-0275

Purpose The purpose of this study is twofold: first, to derive a consistent model free-surface runup flow problems over deformable beds. The authors couple the nonlinear one-dimensional shallow water equations, including friction terms for the water... Read More about A hybrid finite volume/finite element method for shallow water waves by static deformation on seabeds.

Water retention and characteristic curves representing tropical clay soils from Africa (2020)
Presentation / Conference Contribution
Alhaj, K., Biscontin, G., Elshafie, M., & Osman, A. (2020, December). Water retention and characteristic curves representing tropical clay soils from Africa. Presented at 4th European Conference on Unsaturated Soils (E-UNSAT 2020), ONLINE CONFERENCE

Soil water retention curves (SWRCs) form an essential component of frameworks coupling the hydromechanical behaviour of unsaturated soils. The curves describe how suction changes with variables such as degree of saturation, void ratio and volumetric/... Read More about Water retention and characteristic curves representing tropical clay soils from Africa.