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Narayanaswamy, K. S.
- Mixed-mode fracture (KI and KII) evaluation in epoxy resin using ASENB configuration
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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.
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- Review Paper on Development of Nano Inserts for Machining HRSA Materials for Aerospace Applications
Abstract Views :75 |
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Authors
Affiliations
1 School of Mechanical Engineering, Reva University, Kattigenahalli, Bangalore, Karnataka, India., IN
1 School of Mechanical Engineering, Reva University, Kattigenahalli, Bangalore, Karnataka, India., IN
Source
Journal of Mines, Metals and Fuels, Vol 70, No 10A (2022), Pagination: 416-423Abstract
In the current scenario, cutting tool industries use the powder material tungsten carbide of 60-80 microns grain size to produce cutting inserts. There are a lot of scopes to improve the properties of cutting tool materials to enhance their ability to machine challenging materials like heat resistant super alloys (HRSA). Reducing the grain size of cutting tool material powder to nano level may help to increase the strength, substrate hardness, Fracture toughness, and thermal conductivity of the cutting insert. This review studies different strategies used to develop nano powders for the cutting tool application. We observed that most of the studies focused on the latest powders used in cutting tool industries like tungsten carbide, boron carbide powders which are reduced as nano powders, pressed, and sintered with different techniques like hot isostatic pressing (HIP), Spark plasma sintering. Finally, the current research gaps and the future challenges in understanding the development of nano powders for cutting tool applications are critically discussed, providing an interpretation of the possible directions for scientific development in this field.
Keywords
HRSA, Cutting Tools, Nano Powders, Tungsten Carbide, Grain Growth Inhibitors, Spark Plasma Sintering.References
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