Tribology, Sealing & Lubrication Expertise’s Post

[The cornerstone of composites simulation: Damage] Detailed analysis of damage in #compositestructures is done through Computational Mesomechanics. These models represent individual plies which is ideal to capture any #damage mechanism inside the ply (intralaminar) as well as delamination (interlaminar).     ▶ Intralaminar damage refers to all the degradation mechanisms within the ply, such as #fiber breakage, fiber kinking, matrix cracking, etc. Often implemented through CDM (Continuum Damage Mechanics) following one of the many constitutive models available in the literature (e.g. Hashin, Puck, Ladeveze, LaRC, CompDam...).    ▶ Interlaminar damage or delamination, is often represented by CZM (Cohesive Zone Models), using cohesive surfaces or cohesive elements. CZM have demonstrated unmatched performance in #finiteelementanalysis.    Leveraging the theoretical foundations of damage models is a must to succeed in such detailed #simulations. And that's not easy, along the journey we'll need to address convergence issues, preview the influence of material properties, put in practice advanced meshing techniques, etc.      🔔 On Friday, I will give an online #seminar where I will be showing the fundamentals about Computational Mesomechanics through practical examples featuring multiple damage phenomena (matrix cracking, delamination...), and a lot more about simulation of composite materials with #abaqus. To attend this seminar, you can register here: https://lnkd.in/eDUKiSdR #mechanicalengineering #fem #fea

🚀 Excited to Share Our Latest Publication! 📄 I'm happy to announce that our new research paper, " Multiscale finite element modeling of origami-inspired dual matrix deployable composite with visco-hyperelastic hinge." has been published in Composite Structures Thanks to all co-authors, specially our group members Dr Israr Uddin, Dr Adnan Ahmed and Siddhesh Kulkarni, for their invaluable contributions and dedications.. This remarkable accomplishment could not have been achieved without the generous funding and support from Khalifa University. 🔍 Key Highlights:. This study presents a multiscale FE modeling approach to investigate the folding and deployment behavior of origami inspired dual-matrix deployable composite with visco-hyperelastic hinge. The proposed multiscale FE model was employed to simulate the influence of modulus relaxation of hinge on the long-term deployment behavior of a origami-inspired structures. 🔗 Read the Full Paper: https://lnkd.in/d9Hua2_H

I would like to extend my heartfelt thanks to everyone who has supported our research. A special note of gratitude goes to Rajasekhar Sir, who has been a constant source of motivation and encouragement throughout this journey. Your guidance has been instrumental in our success, and I’ve never experienced this level of support before. I would also like to thank my co-authors for their invaluable contributions to our published papers. Research Focus: Isogeometric Analysis (IGA) and Optimization for Thermal Applications in Fins Our current research focuses on two key areas: Isogeometric Analysis (IGA) and Optimization applied to thermal applications in fins, which are widely used in everyday surroundings. IGA offers a more effective alternative to the traditional Finite Element Method (FEM), particularly for solving complex shapes in linear problems. Unlike FEM, where meshing and refinement can be challenging—especially for irregular and small areas—IGA provides superior accuracy with less simulation time. Additionally, IGA allows us to optimize shapes by simply varying control points, eliminating the need to modify the model. This methodology holds great potential for advancing thermal application designs, and we are excited to contribute to this evolving field. You can find more details about our research in the paper linked below. link :-https://lnkd.in/gBxV4kuN Title:- Multi-objective shape optimization of fin using IGA and NSGA-II

This paper is useful for analyzing SIFs for various crack length accurately and efficiently. Title: Analysis method useful for calculating various interface stress intensity factors efficiently by using a proportional stress field of a single reference solution modeling Journal: Archive of Applied Mechanics DOI 10.1007/s00419-024-02540-6

Ever wondered how zirconia particles influence the toughness and damage resistance of TRIP steel composites? Discover the intricate mechanisms behind microstructural deformation and damage in our latest open-access article published in the Journal of Materials Science. Read more about it at: https://lnkd.in/eQYsJGzn

𝗔𝗱𝘃𝗮𝗻𝗰𝗶𝗻𝗴 𝘁𝗵𝗲 𝗳𝗶𝗲𝗹𝗱 𝗼𝗳 𝗖𝗙𝗗: 𝗳𝗹𝘂𝗶𝗱𝘀 𝗼𝗳 𝗰𝗼𝗺𝗽𝗹𝗲𝘅 𝗿𝗵𝗲𝗼𝗹𝗼𝗴𝘆 The Weissenberg effect, also known as rod climbing, is a phenomenon observed in rheology of complex fluids like polymers. This effect occurs when a viscoelastic material is subject to shear forces and rotation simultaneously. In the Weissenberg effect, a cylindrical rotating rod immersed in a viscoelastic material, such as a polymer melt or solution, starts climbing along its axis as shown in the video. From the paper: "The Weissenberg effect or rod climbing occurs due to the influence of normal stress differences in the variation of the pressure value in the radial direction. Therefore, the normal stresses may cause the total normal pressure to decrease in the radial direction (...)" Want to know the details about modeling and numerics? Have a look at this paper: https://lnkd.in/eiwVQe59 Enjoy! #CFD #simulation #technology #rheology #polymer #flow #engineering #CAE #community #sharingsiscaring #IANUS #IANUSSimulation Source: https://lnkd.in/eJ396FUW

I am thrilled to share our latest research paper, which introduces a pioneering #auxetic unit cell design inspired by the intricate geometric patterns of the #IsfahanJamehMosque in Iran. This innovative approach not only showcases the significant advancement in the field of #metamaterials but also represents a rich historical motif of my home country. I extend my heartfelt gratitude to Mr. Mohammad Bashtani, my esteemed master student, and Prof. Hong Hu for their invaluable contributions to this impactful research to publish in “Materials Today Communications” journal. Together, we are paving the way for a new era of energy absorption technology, driven by creativity, collaboration, and a deep appreciation for the cultural heritage that inspires our work. Our study encompasses the creation of two distinct auxetic structures utilizing varying configurations of the proposed unit cell, manufactured using fused deposition modeling (#FDM) additive technology. Through a combination of experimental testing and finite element method (#FEM) analysis, we have assessed their negative Poisson’s ratio and Specific Energy Absorption. The results of our comparative analysis reveal that these newly designed structures exhibit a remarkable improvement in energy absorption capabilities when compared to traditional reentrant auxetic structures. This discovery positions our auxetic structures as highly efficient energy absorbers, with the potential to outperform existing alternatives. To see deeper into our findings, please visit: https://lnkd.in/gFh9ZUS4.

Understanding rheology is key for accurate CFD modeling of non-Newtonian fluids. The Weissenberg effect is a great example. #CFD #rheology #fluids

𝗔𝗱𝘃𝗮𝗻𝗰𝗶𝗻𝗴 𝘁𝗵𝗲 𝗳𝗶𝗲𝗹𝗱 𝗼𝗳 𝗖𝗙𝗗: 𝗳𝗹𝘂𝗶𝗱𝘀 𝗼𝗳 𝗰𝗼𝗺𝗽𝗹𝗲𝘅 𝗿𝗵𝗲𝗼𝗹𝗼𝗴𝘆 The Weissenberg effect, also known as rod climbing, is a phenomenon observed in rheology of complex fluids like polymers. This effect occurs when a viscoelastic material is subject to shear forces and rotation simultaneously. In the Weissenberg effect, a cylindrical rotating rod immersed in a viscoelastic material, such as a polymer melt or solution, starts climbing along its axis as shown in the video. From the paper: "The Weissenberg effect or rod climbing occurs due to the influence of normal stress differences in the variation of the pressure value in the radial direction. Therefore, the normal stresses may cause the total normal pressure to decrease in the radial direction (...)" Want to know the details about modeling and numerics? Have a look at this paper: https://lnkd.in/eiwVQe59 Enjoy! #CFD #simulation #technology #rheology #polymer #flow #engineering #CAE #community #sharingsiscaring Source: https://lnkd.in/eJ396FUW

𝗔𝗱𝘃𝗮𝗻𝗰𝗶𝗻𝗴 𝘁𝗵𝗲 𝗳𝗶𝗲𝗹𝗱 𝗼𝗳 𝗖𝗙𝗗: 𝗳𝗹𝘂𝗶𝗱𝘀 𝗼𝗳 𝗰𝗼𝗺𝗽𝗹𝗲𝘅 𝗿𝗵𝗲𝗼𝗹𝗼𝗴𝘆 The Weissenberg effect, also known as rod climbing, is a phenomenon observed in rheology of complex fluids like polymers. This effect occurs when a viscoelastic material is subject to shear forces and rotation simultaneously. In the Weissenberg effect, a cylindrical rotating rod immersed in a viscoelastic material, such as a polymer melt or solution, starts climbing along its axis as shown in the video. From the paper: "The Weissenberg effect or rod climbing occurs due to the influence of normal stress differences in the variation of the pressure value in the radial direction. Therefore, the normal stresses may cause the total normal pressure to decrease in the radial direction (...)" Want to know the details about modeling and numerics? Have a look at this paper: https://lnkd.in/eiwVQe59 Enjoy! #CFD #simulation #technology #rheology #polymer #flow #engineering #CAE #community #sharingsiscaring Source: https://lnkd.in/eJ396FUW