Green Design and Manufacturing for Sustainability

Jha, Nand K.

doi:10.1201/b19526

Cited by 10 publications

(6 citation statements)

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“…For a typical static bolted joint, the evaluation of three failure modes to determine the highest load that the bolted joint can withstand is performed further. These failure modes are tensile failure of the bolt body, shear failure of the bolt threads and shear failure of the internal threads (Jha, 2015). The amount of force required to break the bolt (designed pin in this case) in tension and shear are calculated below assuming factor of safety as 1.…”

Section: Thread Failure Analysismentioning

confidence: 99%

“…1. Tensile force required to break the bolt or pin, Pt = Syt×At = 161.7 kN Where, Syt= Yield strength in tension (EN31 = 660 N/mm 2 ) (Mahata, 2015) and At = Tensile stress area of the bolt or pin = 245 mm 2 (Jha, 2015).…”

Section: Thread Failure Analysismentioning

confidence: 99%

“…3. Shearing force required to break the internal threads, Psi = Ssy×Asi= 345.7 kN where, Asi = Shear stress area or stripping area of internal threads = 45.4Le (Jha, 2015).…”

Section: Thread Failure Analysismentioning

confidence: 99%

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A Design Insight for Substitution of Metal Shims with Reverse Engineered Element in Tool Post for Alignment of Tool-Work Center

Lata

Hitesh

2020

EJEST

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This research work propounds and analyses the comparison of solution to the issue of height adjustment of tool in four way tool post. The customary way of tool lifting in tool post to centre of work i.e. by adding/removing metal packing, is altered by introducing a design alternative for tool lifting, an upgradation in the former proposed design named solid double cone threaded pin (SDCTP). It is explicitly studied to investigate its limitation and scope for further design amendments. In the premise, a revised design is proposed including modifications named as solid cone threaded pin (SCTP) and is fabricated along with its assembly. Mathematical calculations of least count and screw thread analysis are performed on both the pins. Finite element analysis on CREO is executed to calculate stresses induced for diverse loads to analyze pin failure conditions. The results of new modified design is compared with the erstwhile concluding that SCTP design is preferable over SDCTP design entailing precise tool adjustment, saving time and higher efficiency in machining operations. The paper subsequently explores conventional tool lifting method and its shortfall, shortcomings of former design, revised design and its comparison, fabrication of revised design, conclusions and future ambit.

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Section: Thread Failure Analysismentioning

confidence: 99%

Section: Thread Failure Analysismentioning

confidence: 99%

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A Design Insight for Substitution of Metal Shims with Reverse Engineered Element in Tool Post for Alignment of Tool-Work Center

Lata

Hitesh

2020

EJEST

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“…Regarding potato, global production reached 388 million tons in 2017, and the Brazilian production was 3.6 million tons in the same year (Food and Agriculture Organization, 2017). This production volume represents a large amount of potato peel waste, since 8% of potatoes are lost in peeling during industrial processing (Jha, 2015). Therefore, potato peels and pumpkin seeds are good examples of by-products that could be used in food production in order to reduce environmental impacts.…”

Section: Introductionmentioning

confidence: 99%

Effect of potato peel, pumpkin seed, and quinoa flours on sensory and chemical characteristics of gluten-free breads

Jacinto

Stieven

Maciel

et al. 2020

Braz. J. Food Technol.

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Celiac disease is characterized by the body’s inability to digest gluten in the small intestine, and the dietary treatment consists of avoiding foods that contain this protein. Potato peel, pumpkin seeds, and quinoa are ingredients that can be used to produce gluten-free bread. The aim of this work was to evaluate chemical and sensory characteristics of gluten-free breads consisting of the idea to compare both made with traditional ingredients and with the addition of Potato Peel Flour (PPF), Pumpkin Seed Flour (PSF), and Quinoa Flour (QF). Sensory analysis of the prepared gluten-free breads and chemical analysis of the alternative flours were performed, as well as the formulations developed. The bread formulation with traditional flours and starches that obtained the highest acceptance in the sensory evaluation was used as a base to prepare three bread formulations, with 2.5%, 5.0%, and 7.5% of each alternative flours. Regarding the chemical analysis of the flours, carbohydrate concentrations of PPF and QF did not differ statistically. Lipid, protein, and ash levels in PSF were significantly higher than those in the other flours. Carbohydrate, ash, and lipid contents of the three formulations made with alternative flours showed no significant differences. The formulation with 5.0% of the alternative flours had higher sensory acceptance. The results showed that the alternative flours used are viable alternatives for the production of gluten-free breads, making it possible to improve the diet of part of the population with celiac disease by increasing the nutritional contents of minerals, lipids, and proteins.

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“…DfD involves making design choices for the easier maintenance, repair, recovery, and reuse of components and/or materials (Jha ). Most DfD strategies consist of small changes in the part‐assembling systems, changes to and adaptations of components and parts, and the replacement of connections such as screws by snap‐fitting mechanisms, which may reduce the disassembly effort needed to separate components (Giudice and Kassem ).…”

Section: Introductionmentioning

confidence: 99%

Design for Disassembly Criteria in EU Product Policies for a More Circular Economy: A Method for Analyzing Battery Packs in PC‐Tablets and Subnotebooks

Peiró

Ardente

Mathieux

2017

J of Industrial Ecology

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SummaryTechnological advances are increasing the complexity of products, especially those in the area of information and communication technologies. Complexity has increased in several aspects: An increased number of materials are used in products, small amounts of materials with key functions are included (i.e., rare earths in light-emitting diodes), and there are more combinations of diverse types of components and connections. The difficulty of separating parts of the products limits the development of circular economy strategies where repair, upgrade, and remanufacture prevent wasting valuable resources contained in those products. This article presents a method for analyzing the removal of battery packs in newer portable computer models, namely PC-tablets and subnotebooks, as an example on how the design of batteries can affect the life span and potential reuse of such computers. The study analyzes the difficulty of removing battery packs using the results from previous analyses of the design for disassembly of newer computer models together with audiovisual material available on the Internet. The disassembly tasks for removal of batteries are summarized by disassembly codes that could be used to help identify the design features that facilitate easier disassembly. The article goes on to discuss also how the results could be included in European Union (EU) product policies aimed to help meet some of the objectives of the European Commission's (EC) Circular Economy Package. Keywords:batteries circular economy computer eco-design product design resource efficiency Supporting information is linked to this article on the JIE website

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Green Design and Manufacturing for Sustainability

Cited by 10 publications

References 0 publications

A Design Insight for Substitution of Metal Shims with Reverse Engineered Element in Tool Post for Alignment of Tool-Work Center

A Design Insight for Substitution of Metal Shims with Reverse Engineered Element in Tool Post for Alignment of Tool-Work Center

Effect of potato peel, pumpkin seed, and quinoa flours on sensory and chemical characteristics of gluten-free breads

Design for Disassembly Criteria in EU Product Policies for a More Circular Economy: A Method for Analyzing Battery Packs in PC‐Tablets and Subnotebooks

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