Kunduru Sravanthi
@mlritm.ac.in
associate professor/mechanical engineering
Marri Laxman Reddy Institute of Technology and Management
RESEARCH INTERESTS
composite materials
Scopus Publications
Scopus Publications
K. Sravanthi, V. Mahesh, B. Nageswara Rao, and S. P. Jani
Wiley
AbstractE‐glass fibers are widely preferred due to ease of processing and its low cost, which has substantial scope in the fields of electronics and electrical insulation applications. Because of its low strength and corrosion resistance, use of E‐glass fibers is limited in aerospace and automotive applications. There is a need for enhancing the properties of the composite to overcome such limitations. Therefore, an attempt is made to introduce multi‐walled carbon nanotubes (MWCNT) as fillers into E‐glass fibers to meet the industry needs. In the current study, woven glass fiber of 5 layers and multi‐walled nano carbon fillers of 2, 4 and 6 by wt%, LY556 epoxy resin, and HY951 hardener were used to prepare 4 different type of composites along with the neat epoxy glass fiber reinforced polymer composites (GFRP). The hand‐layup route was used in the composite preparation due to its low cost, technological feasibility, and simple process setup. The developed samples were characterized for mechanical properties via tensile, flexural and impact tests. Tribological characteristics were performed by air jet erosion test. Chauvenet's criterion is applied for identifying the outliers (if any) from the data of repeated test properties. Taguchi's (orthogonal array) is selected for obtaining optimal hybrid composite, which yield better mechanical properties. Empirical relations are developed for the material properties in terms of process variables. The sample (4 wt% MWCNT) exhibited enhancement of 17.27% in tensile strength, 6% of impact strength and 7.3% of flexural strength when compared with neat epoxy GFRP. This hybrid composite is considered for thermal aging and observed at 60°C, 8% increase in tensile, 7% increase of impact and 15% in flexural strength due to the precipitation on carbon nano tubes along the gain boundaries. The present study recommends 4% MWCNT fillers in developing hybrid glass epoxy polymer composites for use in aerospace, automotive and civil construction industries due to economic and technological feasibility.Highlights Utilize low‐cost E‐glass fibers in electronics and electrical insulation applications. Improve composite properties for aerospace and automotive industries. Develop hybrid glass epoxy composites with 2 to 6 wt% MWCNT fillers. Examine wear characteristics under air jet erosion and study the impact of thermal aging on mechanical properties. Apply Chauvenet's criterion for outlier identification in measured properties datasets.
K. Sravanthi, B. Nageswara Rao, and V. Mahesh
AIP Publishing
P. Sai Vardhan Reddy, K. Sravanthi, and S.P. Jani
Trans Tech Publications, Ltd.
The natural filler material is reinforced along with natural fibers in the composite to improve the quality and property of the component materials based on the requirements and its applications. In this paper, the hybrid composite was developed with Hemp/ Basalt fiber. Various wt% (15%,20%,25%) of Hemp fiber and filler materials were used as reinforcement. The Hemp fiber was surface treated with 5% of KMnO4. The developed hybrid natural fiber composites were performed with various mechanical properties studies like tensile, bending, impact, and Brinell hardness all these tests were performed as per ASTM standards. From the mechanical property study, 25 wt% Hemp fiber hybrid composite hold good mechanical properties compared to all other wt% developed hybrid composite.
K. Sravanthi, V. Mahesh, B.N. Rao, George Fernandez, and Lenin A. Haiter
Hindawi Limited
In the current study, multiwalled carbon nanotubes (MWCNTs) and carbon particles (micron size) were employed to create carbon particle dispersions. At different impact angles, the erosion of abrasive particles in an air jet is examined. Carbon particles dispersed across a metal matrix increased the fibre bonding but decreased the mechanical strength. In the sample, carbon nanotubes make up 5% of the total. The strength of carbon nanotubes in matrix materials overcomes the growth in carbon particle length significantly. When carbon particles are present, the matrix material weakens and becomes brittle. Due to the effect of attrition on exposed surfaces, materials that are subjected to particle impingement are more vulnerable to erosive processes. Carbon has significantly improved the matrix material’s surface property. The research findings significantly affect 5% of the CNT composite. At 30°, 0.0033 g/min showed the least proportion of abrasive wear. Erosive wear decreases at the lowest impingement angle but increases as the impact angle increases. Since it causes brittleness, increasing the weight percentage of carbon particles is discouraged.
Kinnera Rambabu, P. Gandhi, Modem Susmitha, and K Sravanthi
Elsevier BV
Kishore Chakinala, K. Sravanthi, and S.P. Jani
Elsevier BV
K. Sravanthi, V. Mahesh, and B. Nageswara Rao
Elsevier BV