Faculty Publications
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Publications by NITK Faculty
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Item Low-velocity Impact Response of Jute/Banana Fiber in Natural Rubber-Based Hybrid Composites: FE Approach(Springer, 2024) Kumbhare, K.; Mahesh, V.; Joladarashi, S.Green composites are proposed as environmentally friendly, easily recycled, and reusable advanced composite materials. The present study aims at studying the damage done by low-velocity impact (LVI) of jute and banana fiber-based green composites using commercial finite element (FE) software. The LVI response is evaluated for flat, hemispherical, and conical impactors at three velocities of 5, 10, and 15 m/s. Hybrid composites are modeled in two stacking sequences: jute-rubber-banana-rubber-jute (JRBRJ) and banana-rubber-jute-rubber-banana (BRJRB). These hybrid green composites are compared to their pure fiber counterpart composites, i.e., jute-rubber-jute-rubber-jute (JRJRJ) and banana-rubber-banana-rubber-banana (BRBRB). The ABAQUS Finite Element Modeling software is used to model, and the explicit dynamic solver is used to simulate these proposed composites. The absorbed energy at 5 m/s for flat impactor for JRJRJ and BRBRB is 3.5 J and 0.52 J, respectively, whereas for JRBRJ and BRJRB is 2.3 J and 1.4 J, respectively. Similar results are obtained for 10 and 15 m/s. The energy absorbed follows a sequence JRJRJ > (JRBRJ, BRJRB) > BRBRB. The flat impactor has more damage due to its larger contact area and high energy absorption at higher velocities. Impact due to conical impactor shows local penetration and lower energy absorption. Results show that the proposed composites exhibit better energy absorption due to a flexible matrix and more resistance to damage due to the involvement of a hybrid structure which makes the composite stiffer. © 2024, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.Item Comparative study on low velocity impact behavior of natural hybrid and non hybrid flexible thermoplastic based composites(SAGE Publications Ltd, 2023) Kumbhare, K.; Mahesh, V.; Joladarashi, S.; Kulkarni, S.M.The current study attempts to evaluate the low-velocity impact (LVI) behavior of jute and banana fiber-based hybrid and non hybrid green composites. The proposed composites are fabricated using compression moulding method with variety of positioning of layers namely jute-rubber-jute-rubber-jute (JRJRJ), banana-rubber-banana-rubber-banana (BRBRB), jute-rubber-banana-rubber-jute (JRBRJ) and banana-rubber-jute-rubber-banana (BRJRB). Thus developed composites are subjected to LVI testing using conical and hemispherical shaped impactor in drop weight impact testing machine and different impact velocities of 5 m/s, 10 m/s and 15 m/s. Based on the ability of the proposed composites to absorb energy, coefficient of restitution (CoR), energy loss percentage (ELP), and failure behaviour, the suggested flexible composites’ performances are assessed. The study reveals that JRJRJ composite exhibits better energy absorption capability and BRBRB exhibits least energy absorption capability compared to its counterparts. The damage study reveals that hemispherical impactor leads to more damage area due to its larger contact area whereas, conical impactor results in local penetration. Results reveals that inclusion of jute fiber as reinforcement results in better LVI properties compared to banana fiber. It is also clear that the presence of a compliant matrix improves energy absorption and damage resistance in flexible composites. © The Author(s) 2022.