Ujendra Komal currently works at the Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee. Ujendra does research in Manufacturing Engineering, Materials Engineering and Mechanical Engineering. Their current project is 'Characterization, Processing and Degradation of Polymer Based Green Composites.
RESEARCH INTERESTS
Composite Materials, Polymer Composites, Natural Fibers, Natural Fiber Reinforced Composites, Recycling and Degradation of Polymer Composites, Mechanical Behavior of Advanced Materials
Analysis of Open-Hole Tensile Characteristics of Additively Manufactured Continuous Glass Fiber/Onyx Composites Mansingh Yadav, Ujendra Kumar Komal, Asim Tewari Polymer Composites, 2026 The development of additively manufactured continuous fiber‐based polymer composites has received remarkable attention in developing next‐generation composite materials for numerous structural and non‐structural applications. The present study used an FDM‐based 3D printer to fabricate continuous glass fiber/Onyx composites (with and without holes) utilizing three infill patterns (solid, triangular, and gyroid). The open‐hole tensile properties of the composites were evaluated under quasi‐static tensile loading. The initiation and propagation of damage during testing were captured and analyzed using DIC. For specimens with holes, triangular infill provided the highest tensile strength (183 MPa), followed by solid (172 MPa) and gyroid patterns (167 MPa). The solid infill exhibited the highest tensile strength (278 MPa) for specimens without a hole, followed by triangular (264 MPa) and gyroid (252 MPa) infill patterns. For the composite with a hole, the gyroid infill exhibited the highest specific stiffness (735 MPa/g), followed by 720 and 700 MPa/g for triangular and solid infill, respectively. DIC results depict infill patterns, and stress concentrators significantly influence the damage initiation and propagation in the composites. Fractographic analysis revealed that composites with holes and solid infill patterns primarily failed due to longitudinal splitting at the gauge center. In contrast, those with gyroid and triangular infill patterns exhibited lateral failure.
Recent Advancements in Epoxy Resins: Imine, Transesterification, and Disulfide Vitrimer Systems Sathyaraj Sankar Lal, Sekar Kannan, Favas Edavankaran, Ujendra Kumar Komal Polymers for Advanced Technologies, 2026 The exceptional dimensional stability, mechanical strength, and resistance to heat and chemicals have made epoxy resins essential materials in numerous applications, such as automotive and aerospace components, the appliance industry, decorative paints and coatings, electronic potting applications, biomedical devices, and industrial equipment. However, due to their highly crosslinked thermoset nature, epoxy resins are not reprocessable, repairable, or recyclable, which has led to a significant amount of material waste at the end of their service life. With increasing environmental awareness and cost pressures, there has been a growing demand over the past decade to develop epoxy systems that can be reprocessed through molding or remelting. In this context, vitrimers have emerged as a promising alternative, enabling, in principle, recyclability and reparability through dynamic covalent chemistry. These properties make vitrimers a potentially powerful class of sustainable polymer materials, extending beyond the use of slowly recyclable plastics. This paper provides a comprehensive overview of epoxy vitrimers, with particular emphasis on systems incorporating dynamic bonds from the imine, ester, and disulfide families, as well as composite formulations and the latest advances reported in this rapidly expanding field.
Investigation of the structural performance and failure mechanisms of 3D printed continuous carbon fiber-based composites Ujendra Kumar Komal, Amir Hamza Siddiqui, Asim Tewari Polymer Composites, 2025 Additive manufacturing of continuous fiber‐based polymeric composites has attracted global attention. This contemporary technology enables the flexibility of manufacturing customized, partially and fully functional, and advanced composite components for numerous semi‐structural and structural applications. The current study investigates the structural performance of 3D‐printed carbon fiber‐based composites in the context of tensile, flexural, and high‐cycle fatigue. The crucial S‐N curves for the unidirectional (UD) (0°) and cross‐ply (CP) (0, 90) composites have been plotted. The dominating failure mechanisms responsible for the failure of 3D printed composites under tensile, flexural, and high cycle fatigue loading at the micro‐scale have been thoroughly investigated. The influence of fiber orientation on the failure mechanisms under different structural loading has been rigorously studied. The current findings conclude that cross‐ply (0, 90) composites exhibited superior fatigue performance than the unidirectional composites when investigated at 70% of their ultimate tensile strength. The current investigation reveals that the formation of voids during 3D printing and majorly during loading is one of the leading causes of the failure of additively manufactured composites under mechanical and cyclic loads. The fiber pull‐out, fiber breakage, de‐bonding, and voids are the dominating failure mechanisms observed under tensile loading. In addition to the failure mechanisms listed under tensile loading, matrix fractures have also been observed under flexural loading. The dominating failure mechanisms differed for UD, CP (0, 90), and CP (45, −45) composites.Highlights Investigated tensile, flexural, and fatigue properties of continuous fiber 3D‐printed composites. Examined failure mechanisms under tensile, bending, and fatigue loading. Developed test coupons with built‐in tabs for tensile and fatigue testing. Cross‐ply composites showed better fatigue performance than unidirectional.
Introduction to Green Composites Hitesh Sharma, Ujendra Kumar Komal, Inderdeep Singh, Joy Prakash Misra, Pawan Kumar Rakesh Materials Horizons from Nature to Nanomaterials, 2019
From static properties to fatigue life: comprehensive evaluation of unidirectional and woven flax fiber composites for structural applications P Rakesh, UK Komal, N Muthu Composite Structures, 120121 , 2026 2026
Analysis of Open‐Hole Tensile Characteristics of Additively Manufactured Continuous Glass Fiber/Onyx Composites M Yadav, UK Komal, A Tewari Polymer Composites 47 (2), 1798-1811 , 2026 2026 Citations: 1
Recent Advancements in Epoxy Resins: Imine, Transesterification, and Disulfide Vitrimer Systems S Sankar Lal, S Kannan, F Edavankaran, UK Komal Polymers for Advanced Technologies 37 (1), e70515 , 2026 2026
Investigation of the mechanical response of MWCNTs infused carbon/glass fiber-based hybrid composites using digital image correlation SC Mallampati, UK Komal, P Rakesh, P Barman Construction and Building Materials 492, 143068 , 2025 2025 Citations: 4
Recent advances in lignocellulosic fibers for developing sustainable composites: extraction, surface modification and characterization-A review P Barman, P Rakesh, SC Mallampati, UK Komal International Journal of Biological Macromolecules 310, 143360 , 2025 2025 Citations: 15
Investigation of the structural performance and failure mechanisms of 3D printed continuous carbon fiber‐based composites UK Komal, AH Siddiqui, A Tewari Polymer Composites , 2025 2025 Citations: 9
Pineapple Leaf Fibers: Physical, Mechanical, and Morphological Characterization for Its Application in Sustainable Polymer Composites P Barman, P Rakesh, SC Mallampati, UK Komal Conference on Research and Industrial Conclave-Integration, 281-297 , 2024 2024
4D printing of composites: Challenges, opportunities, and paths to commercialization UK Komal, M Yadav, SA Hamza, MK Dewangan 4D Printing of Composites Methods and Applications, 350 , 2024 2024
Sustainable treatments of pineapple leaf fibers for polylactic acid based biocomposites UK Komal, I Singh Journal of Natural Fibers 19 (16), 13438-13456 , 2022 2022 Citations: 20
Extraction and characterization of munja fibers and its potential in the biocomposites MK Lila, UK Komal, Y Singh, I Singh Journal of Natural Fibers 19 (7), 2675-2693 , 2022 2022 Citations: 51
Processing of PLA/pineapple fiber based next generation composites UK Komal, MK Lila, I Singh Materials and Manufacturing Processes 36 (14), 1677-1692 , 2021 2021 Citations: 40
Property Analysis and Characterization of Biomass-Based Composites TP Naik, UK Komal, I Singh Value-Added Biocomposites, 65-85 , 2021 2021
Comparative performance analysis of polylactic acid parts fabricated by 3D printing and injection molding UK Komal, BK Kasaudhan, I Singh Journal of Materials Engineering and Performance 30 (9), 6522-6528 , 2021 2021 Citations: 54
Thermal post-processing of bagasse fiber reinforced polypropylene composites MK Lila, UK Komal, I Singh Composites Communications 23, 100546 , 2021 2021 Citations: 11
Development of banana fiber reinforced composites from plastic waste BK Singh, UK Komal, Y Singh, SS Banwait, I Singh Materials Today: Proceedings 44, 2194-2198 , 2021 2021 Citations: 24
Effect of chemical treatment on thermal, mechanical and degradation behavior of banana fiber reinforced polymer composites UK Komal, V Verma, T Ashwani, N Verma, I Singh Journal of Natural Fibers , 2020 2020 Citations: 94
PLA/banana fiber based sustainable biocomposites: A manufacturing perspective UK Komal, MK Lila, I Singh Composites Part B: Engineering 180, 107535 , 2020 2020 Citations: 207
Characterization Techniques of Reinforced Polymer Composites MK Lila, UK Komal, I Singh Reinforced Polymer Composites: Processing, Characterization and Post Life … , 2019 2019 Citations: 7
Fabrication of Short Fiber Reinforced Polymer Composites UK Komal, MK Lila, S Chaitanya, I Singh Reinforced Polymer Composites: Processing, Characterization and Post Life … , 2019 2019 Citations: 28
Introduction to green composites H Sharma, UK Komal, I Singh, JP Misra, PK Rakesh Processing of green composites, 1-13 , 2019 2019 Citations: 21
MOST CITED SCHOLAR PUBLICATIONS
PLA/banana fiber based sustainable biocomposites: A manufacturing perspective UK Komal, MK Lila, I Singh Composites Part B: Engineering 180, 107535 , 2020 2020 Citations: 207
Effect of chemical treatment on thermal, mechanical and degradation behavior of banana fiber reinforced polymer composites UK Komal, V Verma, T Ashwani, N Verma, I Singh Journal of Natural Fibers , 2020 2020 Citations: 94
Accelerated thermal ageing behaviour of bagasse fibers reinforced Poly (Lactic Acid) based biocomposites MK Lila, K Shukla, UK Komal, I Singh Composites Part B: Engineering 156, 121-127 , 2019 2019 Citations: 75
Effect of chemical treatment on mechanical behavior of banana fiber reinforced polymer composites UK Komal, V Verma, T Aswani, N Verma, I Singh Materials Today: Proceedings 5 (9), 16983-16989 , 2018 2018 Citations: 58
Amelioration of diethylnitrosamine (DEN)-induced hepatocellular carcinogenesis in animal models via knockdown oxidative stress and proinflammatory markers by Madhuca longifolia … D Singh, M Singh, E Yadav, N Falls, U Komal, DS Dangi, V Kumar, ... RSC advances 8 (13), 6940-6953 , 2018 2018 Citations: 55
Comparative performance analysis of polylactic acid parts fabricated by 3D printing and injection molding UK Komal, BK Kasaudhan, I Singh Journal of Materials Engineering and Performance 30 (9), 6522-6528 , 2021 2021 Citations: 54
Extraction and characterization of munja fibers and its potential in the biocomposites MK Lila, UK Komal, Y Singh, I Singh Journal of Natural Fibers 19 (7), 2675-2693 , 2022 2022 Citations: 51
Processing of PLA/pineapple fiber based next generation composites UK Komal, MK Lila, I Singh Materials and Manufacturing Processes 36 (14), 1677-1692 , 2021 2021 Citations: 40
One‐pot green synthesis and structural characterisation of silver nanoparticles using aqueous leaves extract of Carissa carandas : antioxidant, anticancer and … D Singh, V Kumar, E Yadav, N Falls, M Singh, U Komal, A Verma IET nanobiotechnology 12 (6), 748-756 , 2018 2018 Citations: 35
Fabrication of Short Fiber Reinforced Polymer Composites UK Komal, MK Lila, S Chaitanya, I Singh Reinforced Polymer Composites: Processing, Characterization and Post Life … , 2019 2019 Citations: 28
Development of banana fiber reinforced composites from plastic waste BK Singh, UK Komal, Y Singh, SS Banwait, I Singh Materials Today: Proceedings 44, 2194-2198 , 2021 2021 Citations: 24
Introduction to green composites H Sharma, UK Komal, I Singh, JP Misra, PK Rakesh Processing of green composites, 1-13 , 2019 2019 Citations: 21
Sustainable treatments of pineapple leaf fibers for polylactic acid based biocomposites UK Komal, I Singh Journal of Natural Fibers 19 (16), 13438-13456 , 2022 2022 Citations: 20
Recent advances in lignocellulosic fibers for developing sustainable composites: extraction, surface modification and characterization-A review P Barman, P Rakesh, SC Mallampati, UK Komal International Journal of Biological Macromolecules 310, 143360 , 2025 2025 Citations: 15
Lignocellulosic Polymer Composites: Processing, Challenges, and Opportunities UK Komal, H Sharma, I Singh Processing of Green Composites, 15-30 , 2019 2019 Citations: 13
Thermal post-processing of bagasse fiber reinforced polypropylene composites MK Lila, UK Komal, I Singh Composites Communications 23, 100546 , 2021 2021 Citations: 11
Investigation of the structural performance and failure mechanisms of 3D printed continuous carbon fiber‐based composites UK Komal, AH Siddiqui, A Tewari Polymer Composites , 2025 2025 Citations: 9
Characterization Techniques of Reinforced Polymer Composites MK Lila, UK Komal, I Singh Reinforced Polymer Composites: Processing, Characterization and Post Life … , 2019 2019 Citations: 7
Investigation of the mechanical response of MWCNTs infused carbon/glass fiber-based hybrid composites using digital image correlation SC Mallampati, UK Komal, P Rakesh, P Barman Construction and Building Materials 492, 143068 , 2025 2025 Citations: 4
Drilling Behaviour of Natural Fibre-Reinforced Polymer Matrix Composites UK Komal, MK Lila, I Singh Primary and Secondary Manufacturing of Polymer Matrix Composites, 173-187 , 2017 2017 Citations: 4