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S. Madhankumar, K. Manonmani, V. Karthickeyan, N. Balaji
JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES, Volume 15, pp 7715-7728; https://doi.org/10.15282/jmes.15.1.2021.08.0608

Abstract:
The ultimate strength is an important property of any material for the manufacturing of components. This paper utilized the laser beam welding (LBW), due to its smaller dimension, which produces lesser distortion and process velocity is higher. Inconel 625 alloy and duplex 2205 stainless steel is having higher strength and corrosive resistance properties. Due to the above-mentioned properties, it could be used in oil and gas storage containers, marine and geothermal applications. This research work presents an investigation of various input variable effects on the output variable (ultimate tensile strength) in LBW for dissimilar materials namely, Inconel 625 alloy and duplex 2205 stainless steel. The input variables for this research are the power of a laser, welding speed, and focal position. The experimental runs are developed with the help of design of experiment (DOE) and utilized statistical design expert software. The ultimate tensile strength on different runs is measured using a universal tensile testing machine. Then from a response surface methodology and ANOVA, the optimum value of ultimate tensile strength was determined to maximize the weld joint and bead geometry. Finally, the confirmation test was carried out, it reveals the maximum error of 0.912% with the predicted value. In addition, the microstructure of the weld beads was examined using optical microscopy.
T. Dziubak
International Journal of Automotive and Mechanical Engineering, Volume 18, pp 8621-8636; https://doi.org/10.15282/ijame.18.1.2021.21.0656

Abstract:
The aim of this study is to provide an experimental properties evaluation of a standard filter material (cellulose) and materials with fiber layer addition with small diameters (nanofibers). Filter media, including cellulose, used in the internal combustion engine inlet air filtration are made of high diameter fibres, approx. 15 µm. Significantly higher separation and filtration efficiency performance are obtained for materials with lower fibre diameters (nanofibres), however, at the expense of a significantly higher pressure drop, affecting the engine performance. Filter media manufacturers mainly specify the structure parameters (pore size, air permeability and thickness), without giving any information on the dust filtration performance and rate. The literature includes test results for models of different filter media structures. Filtration process modelling using polydisperse dust with particles of different shape and density and irregular filter media structure is possible using advanced computer techniques, however, the process is complex and requires many simplifications. Test results can be applied directly in the automotive industry. The data can be obtained by experimental tests on filter medium specimens, complete filter elements or air filters which are costly and time-consuming tests, however, those test methods are the most reliable. Conditions and testing methodology for intake air filter materials used in internal combustion engines were developed. Filtration and flow resistance efficiency and accuracy were done depending on test dust mass stopped per unit area. Tested materials filtration efficiency was assessed by a filtration quality factor, which includes experimentally determined efficiency and accuracy as well as flow resistance values. Much higher efficiency and filtration accuracy of dust grains below 5 µm in filtration materials with nanofibers addition compared to standard filtration material (filter paper) were demonstrated. For the same flow resistance values, filter materials with nanofibers addition accumulate smaller dust mass than standard filter paper. Usage of materials with nanofibers addition used in motor vehicles intake air filtration ensures their high efficiency and accuracy. It minimises its components wear, but at the expense of faster flow resistance increase, which shortens filter life and increases filter replacement frequency. Results obtained during the experimental research partly fill the gap when it comes to the basic material properties used in internal combustion engines intake air filter partitions production.
Harpreet Singh Dhillon, Shibu Sasidharan
Archives of Medicine and Health Sciences, Volume 9; https://doi.org/10.4103/amhs.amhs_97_21

Resat Ozaras, Altan Bayar, Niiar Alioglu, Semiha Baysoy
Asian Pacific Journal of Tropical Medicine, Volume 14; https://doi.org/10.4103/1995-7645.314112

Vijayalakshmi A Senthilkumar, Techi Dodum Tara
TNOA Journal of Ophthalmic Science and Research, Volume 59; https://doi.org/10.4103/tjosr.tjosr_1_21

Sharmila Rajendrababu, Vijayalakshmi A Senthilkumar
TNOA Journal of Ophthalmic Science and Research, Volume 59; https://doi.org/10.4103/tjosr.tjosr_182_20

Kirandeep Kaur, Bharat Gurnani, Shivanand Narayana, Josephine Christy
TNOA Journal of Ophthalmic Science and Research, Volume 59; https://doi.org/10.4103/tjosr.tjosr_183_20

VishnuM Sharma, BaseerAhmmad Walikar
Published: 1 January 2021
Journal of Advanced Lung Health, Volume 1; https://doi.org/10.4103/jalh.jalh_4_21

Takeshi Ogura, Saori Ueno, Atsushi Okuda, Nobu Nishioka, Kazuhide Higuchi
Published: 1 January 2021
Yi-Chien Yang, Chia-Hsien Yen, Jui Lan, Chao-Kai Hsu, Julia Yu-Yun Lee
Published: 1 January 2021
Dermatologica Sinica, Volume 39; https://doi.org/10.4103/ds.ds_4_21

Chin-Yi Yang, Pin-Hsuan Chiang, Chi-Feng Yen, I-Hsin Shih, Guan-Hua Chen
Published: 1 January 2021
Dermatologica Sinica, Volume 39; https://doi.org/10.4103/ds.ds_12_21

ManojV. Murhekar, Anoop Jaiswal, V. Subbaraj, JeromieWesley Vivian Thangaraj, JayaPrakash Muliyil
Published: 1 January 2021
Indian Journal of Medical Research; https://doi.org/10.4103/ijmr.ijmr_1671_21

Sucheta, Sanjay Kumar, Bharti Saklani, Archana, Raman Kapil, Rajeev Sen
Journal of Cancer Research and Therapeutics; https://doi.org/10.4103/jcrt.jcrt_168_19

Ibrahim Altraif, Nourah Altuwaijri, Lamia Aldhbiban, Fai Alhoshan, Raghad Alomari, Afaf Moukaddem, Hamad Alashgar, Fajr Alqahtani
Saudi Journal of Kidney Diseases and Transplantation; https://doi.org/10.4103/1319-2442.307528

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