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Vitala, H. R.
- Design of Harvesting Mechanism for Advanced Remote-controlled Coconut Harvesting Robot (A.R.C.H-1)
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Authors
Affiliations
1 Department of Mechanical Engineering, East Point College of Engineering and Technology, Bangalore, IN
1 Department of Mechanical Engineering, East Point College of Engineering and Technology, Bangalore, IN
Source
Indian Journal of Science and Technology, Vol 7, No 10 (2014), Pagination: 1465-1470Abstract
A.R.C.H (ark), robot is a coconut tree-climbing robot, designed specifically to harvest coconuts quickly, safely and efficiently. This robot is controlled remotely from the ground, and the operator can see what is happening on top of the tree on his remote-display. The A.R.C.H-1 robot prototype with its novel climbing and fastening mechanism is designed to climb a pole of varying diameter, which simulates a coconut tree. This manuscript deals with the design of a manipulator, with two unique modular end-effectors for the harvesting mechanism of A.R.C.H-1. The two robotic arms with three degrees of freedom are designed in such a way that it can be mounted on either side of the robot head. In addition, this paper also proposes two types of harvesting blades, suitable for the conditions on top of a coconut tree, which can be attached to the robotic arm.Keywords
Agriculture Robot, Agrobot, Cocobot, Coconut-tree Climber, Harvesting RobotFull Text
- Mixed-mode fracture (KI and KII) evaluation in epoxy resin using ASENB configuration
Abstract Views :101 |
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Authors
Affiliations
1 Dayananda Sagar University, Bengaluru, IN
2 SJB Insitute of Technology, Bengaluru, IN
3 Sri Sai Ram College of Engineering, Bengaluru, IN
4 Reva University, Bengaluru, IN
1 Dayananda Sagar University, Bengaluru, IN
2 SJB Insitute of Technology, Bengaluru, IN
3 Sri Sai Ram College of Engineering, Bengaluru, IN
4 Reva University, Bengaluru, IN
Source
Journal of Mines, Metals and Fuels, Vol 69, No 12A (2021), Pagination: 129-136Abstract
Asymmetric Single Edge Notched Bend (ASENB) specimen which is exposed to asymmetric 3-point bending is used to estimate the mixed-mode fracture (I/II) in epoxy. The mode I and mode II combination stress intensity factors (SIF) were calculated for various locations of loading points and different crack lengths using the finite element analysis tool ANSYS. By selecting suitable points for the support positions with the loading point mode I to mode II mixities can be achieved. Then, several fracture tests on epoxy resin were conducted using the suggested ASENB specimen. The crack path follows a straight line for mode I fracture and a curved path from the crack initiation angle for mode II fracture and mode II dominant loading. The broken specimen surfaces under various conditions of loading were observed using scanning electron microscopy (SEM). Fractured specimen surfaces of the tested specimens showed reasonably smooth patterns indicating cleavage fractureKeywords
Epoxy resin, fracture toughness, asymmetric single edge notched bend (ASENB) specimen, stress intensity factor (SIF), 3-point bending.
References
- M. R. Ayatollahi, M. R. M. Aliha, and H. Saghafi, (2011): “An improved semi-circular bend specimen for investigating mixed-mode brittle fracture,” Eng. Fract. Mech., vol.78, no.1, pp.110–123, doi: 10.1016/ j.engfracmech. 2010.10.001.
- M. R. Ayatollahi, M. R. M. Aliha, and M. M. Hassani, (2006): “Mixed mode brittle fracture in PMMA - An experimental study using SCB specimens,” Mater. Sci. Eng. A, vol.417, no.1–2, pp.348–356, doi: 10.1016/ j.msea. 2005.11.002.
- M. R. M. Aliha, A. Bahmani, and S. Akhondi, (2016): “Mixed mode fracture toughness testing of PMMA with different three-point bend type specimens,” Eur. J. Mech. A/Solids, vol.58, no. October, pp. 148–162, doi: 10.1016/j.euromechsol.2016.01.012.
- M. Engineering, (2013): “Rock fracture toughness testing using SCB specimen M. R. Ayatollahi 1,*, M. J. Alborzi 1 1,” pp. 1–7.
- T. Funatsu, N. Shimizu, M. Kuruppu, and K. Matsui, (2014): “Evaluation of Mode I Fracture Toughness Assisted by the Numerical Determination of KResistance,” Rock Mech. Rock Eng., vol.48, no.1, pp.143–157, doi: 10.1007/s00603-014-0550-8.
- K. V. N. Surendra and K. R. Y. Simha, (2013): “Design and analysis of novel compression fracture specimen with constant form factor: Edge cracked semicircular disk (ECSD),” Eng. Fract. Mech., vol.102, pp.235–248, doi: 10.1016/j.engfracmech.2013.02.014.
- K.V.N. Surendra and K.R.Y. Simha, (2014): “Analysis of cracked and un-cracked semicircular rings under symmetric loading,” Eng. Fract. Mech., vol. 128, no. C, pp. 69-90, doi: 10.1016/j.engfracmech. 2014.07.004.
- M. R. Ayatollahi and S. Pirmohammad, (2013): “Experimental determination of mode II fracture resistance in asphalt concretes,” 13th Int. Conf. Fract. 2013, ICF 2013, vol. 7, pp. 5947–5954.
- K. V.N. Surendra and K.R.Y. Simha, (2013): “Synthesis and application of weight function for edge cracked semicircular disk (ECSD),” Eng. Fract. Mech., vol. 107, pp. 61-79, doi: 10.1016/j.engfracmech. 2013.05.010.
- S. Devalapur and H. V Lakshminarayana, (2014): “Studies on Mixed Mode Fracture: Prediction and Verification,” Int. J. Mech. Ind. Technol. ISSN, vol.2, no.1, pp.130–137.