Rajaram Attukur Nandagopal

Dr. Rajaram Attukur Nandagopal

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Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 March 2020 in Composite Structures
Verified
Journal Article
Closed access
RNRajaram Attukur Nandagopal
Rajaram Attukur Nandagopal
CBChai Gin Boay
Chai Gin Boay
Srikanth NarasimaluSrikanth Narasimalu
Srikanth Narasimalu


1 December 2020 in Composites Communications
Verified
Journal Article
Closed access
RNRajaram Attukur Nandagopal
Rajaram Attukur Nandagopal
CBChai Gin Boay
Chai Gin Boay
NSNarasimalu Srikanth
Narasimalu Srikanth

1 August 2020 in International Journal of Fatigue
Verified
Journal Article
Closed access
RNRajaram Attukur Nandagopal
Rajaram Attukur Nandagopal
GCGin Boay Chai
Gin Boay Chai
Srikanth NarasimaluSrikanth Narasimalu
Srikanth Narasimalu

1 February 2021 in Composites Communications
Verified
Journal Article
Closed access
RNRajaram Attukur Nandagopal
Rajaram Attukur Nandagopal
Srikanth NarasimaluSrikanth Narasimalu
Srikanth Narasimalu
GCGin Boay Chai
Gin Boay Chai

11 November 2021 in Journal of Composites Science
Verified
Journal Article
Open access
PDF file
EMEldho Mathew
Eldho Mathew
RNRajaram Attukur Nandagopal
Rajaram Attukur Nandagopal
SJSunil Chandrakant Joshi
Sunil Chandrakant Joshi
PAPinter Armando
Pinter Armando
PMPasi Matteo
Pasi Matteo
Tension-compression (T-C) fatigue response is one of the important design criteria for carbon-fibre-reinforced polymer (CFRP) material, as well as stress concentration. Hence, the objective of the current study is to investigate and quantify the stress concentration in CFRP dog-bone specimens due to T-C quasi-static and fatigue loadings (with anti-buckling fixtures). Dog-bone specimens with a [(0/90),(45/−45)4]s layup were fabricated using woven CFRP prepregs and their low-cycle fatigue behaviour was studied at two stress ratios (−0.1 & −0.5) and two frequencies (3 Hz & 5 Hz). During testing, strain gauges were mounted at the centre and edge regions of the dog-bone specimens to obtain accurate, real-time strain measurements. The corresponding stresses were calculated using Young’s moduli. The stress concentration at the specimen edges, due to quasi-static tension, was significant compared to quasi-static compression loads. Furthermore, the stress concentration increased with the quasi-static loading within the elastic limit. Similarly, the stress concentration at the specimen edges, due to tensile fatigue loads, was more significant and consistent than due to compressive fatigue loads. Finally, the effects of the stress ratio and loading frequency on the stress concentration were noted to be negligible.