iosr-JMCE   Volume-20 ~ Issue-3 ~ May – June 2023

Abstract: By u sing DEM CFD numerical simula tion method, a powder bed model and a laser melting model were established to simulate the SLM forming process. Based on this model, the evolution of the melt pool , the formation of defects and the influence of process parameters on the morphology of the m elt channel during the SLM forming process are studied, and the process parameter optimization was carried out with the goal of minimizing surface roughness S urface roughness measurement method based on the numerical simulation method was proposed, and th e effects of laser power, scanning speed and hatch spacing on surface roughness were studied, as well as the effects of connection rate and physical energy density. The research results show that the lap rate......

KeyWord: selective laser melting; numerical simulation; forming analysis; surface roughness; process parameter optimization

[1] Amato K N, Gaytan S M, Murr L E, et al. Microstructures a nd mechanical behavior of Inconel 718 fabricat ed by selective laser melting . Acta Materialia, 2012, 60(5): 2229 2239.
[2] Popovich V A, Borisov E V, Popovich A A, et al. Impact of heat treatment on mechanical behaviour of Inconel 718 processed wit h tailored mi crostructure by selective laser m elting . Materials & Design, 2017, 131: 12 22.
[3] Li Y, Založnik M, Zollinger J, et al. Effects of the powder, laser parameters and surface conditions on the molten pool forma tion in the sel ective laser melting of IN718 . Journa l of Materials Processing Technology, 2021, 289: 116930.
[4] Baicheng Z, Xiaohua L, Jiaming B, et al. Study of selective laser melting (SLM) Inconel 718 part surface improvement by electrochemical polishing . Materials & Design. 2017, 116: 531 537.

Abstract: Mechanical Fasteners frequently result in a decrease in the composite structure due to the complex stress field in the vicinity the holes region. As a result, particular focus must be placed on fastener architecture. the creation of effective structural fasteners one of the biggest obstacles to the growth of composite building types. The joint's general nature makes it Design merits its own analysis as a case study. Due to the numerous variables involved, characterizing joint failure in bolted composite laminates is challenging. The experimental assessment of the impact of geometric parameters on the joint strength has been a major focus of previous research on mechanically attached joints. The development of analytical methods......

KeyWord: Single bolted Composite joint, Analysis, Failure response

[1]. Goswami S A, J Reinforced Plast Compos, 24 (2005) 161-171.
[2]. Choi, J H & Chun Y J, J Compos Mater, 37 (2003) 2163-2177.
[3]. Scalea F L D, Cappello F & Cloud G L, J Thermoplast Compos Mater, 12 (1999) 13-22.
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Abstract: Background: As dynamic ecosystems, rivers store water and flow it from upstream to downstream. This study aims to determine the amount of sediment volume based on flow velocity data and river flow discharge. This study has three variables: flow velocity, wet cross-sectional area and sediment transport volume.
Materials and MethodsThis research is quantitative research. The sampling point is downstream of the Walanae River, which crosses the area of Kebo Village, Lilirilau District, Soppeng Regency. Measurements were made to obtain primary data in sediment transport, flow velocity, and cross-sectional area carried out at normal water levels (no rain conditions) and during flood water levels.......

KeyWord: Downstream, Flow velocity, Wet cross-sectional area, Sediment volume.

[1] R. Kostaschuk, J. Best, P. Villard, J. Peakall, and M. Franklin, "Measuring flow velocity and sediment transport with an acoustic Doppler current profiler," Geomorphology, vol. 68, no. 1–2, pp. 25–37, 2005.
[2] A. G. Roy, R. Roy, and N. Bergeron, "Hydraulic geometry and changes in flow velocity at a river confluence with coarse bed material," Earth Surf. Process. Landforms, vol. 13, no. 7, pp. 583–598, 1988.
[3] I. H. M. Hasbi and M. S. P. ST, Nilai Viskositas Aliran Sungai Sebagai Salah Satu Indikasi Potensi Banjir Bandang. Deepublish, 2020.
[4] R. Kostaschuk and P. Villard, "Flow and sediment transport over large subaqueous dunes: Fraser River, Canada," Sedimentology, vol. 43, no. 5, pp. 849–863, 1996.
[5] D. H. Shugar et al., "On the relationship between flow and suspended sediment transport over the crest of a sand dune, Río Paraná, Argentina," Sedimentology, vol. 57, no. 1, pp. 252–272, 2010.

Abstract: Special reinforced concrete moment resisting frames are typically used in seismic design for high-rise buildings, but looking at the criteria of SNI 1726-2019 with seismic design category D. Multi-storey building plans can be designed using the dual systems with Special Moment Resisting Frame (SMRF), and Intermediate Moment Resisting Frames (IMRF). This study will compare the predicting efficiency of the dual systems with IMRF to that of the dual systems with SMRF in terms of dimensions, details of reinforcement, and structural performance. The building simulation has a building length and width of 35 x 25 meters, then the height between floors is 4 meters with a building height of 16 meters for Low Rise Building (LRB), 32 meters for Middle Rise Building (MRB), and 48 meters for High Rise Building (HRB). The result of the study shows that the ratio of the longitudinal reinforcement area of the beam elements in the double system of IMRF is not more efficient than the double system of SMRF. Comparison of the area of transverse reinforcement of column elements of IMRF are more efficient than SMRF. Comparison of structural performance of the IMRF system is more efficient than the SMRF System.

[1] PRINS, M. I. - DAPAS, S. O. - WALLAH, S. E.: Studi Komparasi Disain Struktur Bangunan Bertingkat Akibat Gempa Pada 5 Kota di Indonesia. Jurnal Sipil Statik, 5(7), 2017, pp. 411–423. www.puskim.pu.go.id.
[2] RIZKI, F. - ROHMAN, F.: Jurnal Konstruksi Analisis Struktur Ruang Rawat Inap Kelas III Prabu Siliwangi RSUD Gunung Jati Kota Cirebon. In Cirebon Jurnal Konstruksi: Vol. VII, 2018 (Issue 2).
[3] Badan Stadarisasi Nasional.: Tata Cara Perencanaan Ketahanan Gempa Untuk Struktur Bangunan Gedung dan Nongedung (SNI 1726:2019). BSN, Jakarta.
[4] PALIT, C. M. - PANGOUW, J. D. - PANDALEKE, R.: Perencanaan Struktur Gedung Hotel Jalan Martadinata Manado. Jurnal Sipil Statik, 4(4), 2016, pp.263–270.
[5] HIREL, P. - DAPAS, S. O. - PANDALEKE, R.: Perencanaan Struktur Gedung Beton Bertulang Dengan Sistem Rangka Pemikul Momen Khusus. Jurnal Sipil Statik, 6(Juni) 2018, pp. 361–372,

Abstract: (1) An Innovative method of using excels and programming language is developed for design automation assemblies for Air Cooled Heat Exchanger. The design engineers have developed all data bank of design basis, standards, catalogue and basic programming on excel sheet and this is integrated with Solid Edge for 3 dimensional modeling & 2 dimensional manufacturing drawing using CADCUSTOMIZATION++ (ETO based software). In this paper we are explaining benefits of using Design automation which has resulted into very remarkable reduction in design time & is generating flawless manufacturing drawing. Such success in automation also opens the door for further enhancements to the design process resulted into implementation this technology in many of their products for Air Cooled Heat Exchangers and Air Cooled Condensers.

[1]. Ramesh K. Shah, D. P. (2003).Fundamentals of Heat Exchanger Design. New Jercy and Canada: John Wiley & sons Inc.
[2]. 15th Australasian Fluid Mechanics Conference, Sizing of air-cooled heat exchanger, 2005.
[3]. ASME (American Society of Mechanical Engineers) code sec VIII Div-I Edition 2004 Addenda 2006.
[4]. ASME (American Society of Mechanical Engineers) code sec VIII Div-II Edition 2004 Addenda 2006.
[5]. API (American Petroleum Institute) 661 for air cooled heat exchanger, Edition 2006.

Abstract: The investigation of the elements influencing the management of materials in building construction projects is the basis for this research project. A building project must be successfully completed by keeping the correct supplies in the right location at the right time. This activity is done to fill the gaps left by the inadequate material. planning is necessary on building sites. A building project must be successfully completed by keeping the correct supplies in the right location at the right time. This activity is done to fill the gaps left by the inadequate material. planning is necessary on building sites.The work gathered data Factors were known affecting material Management. To investigate factors by using SPSS (Satical Package for social science). A construction project's ability to succeed may depend on the management of its building materials. The objective of this work is to do comparatively study between Manual Material Management and Mechanical Material Management system on Construction industry.

Keywords— Management; Mechanical; Material Requirement planning; Building; Manual; Equipment; Construction

[1]. C. N. Kumar, M. Sakthivel, R. K. Elangovan, and M. Arularasu, Analysis of Material Management Safety in Construction Sites and Countermeasures for Effective Enhancement, the Scientific World Journal, (2015) Volume : 2015, pp 55-65.
[2]. R.Azevedo, C.Martins , J.C.Teixeira, M.Barroso, Obstacle clearance while performing manual material Management tasksin construction sites, Indian Journal of applied research, (2013)Volume: 2, pp 122-127.
[3]. N.Kasim, improving materials management practices in construction projects, International Symposium in Developing Economics,(2009) Volume : 15, pp 101-120.
[4]. H.Pethaperumal and N.Sivakumar, Effectiveness of Mechanical Material Management Equipment Safety in Construction Sites for Operation Safety and Environmental Health, International Journal of Applied Environmental Sciences, (2017) Volume 12, ISSN 0973-6077, pp 211-220.
[5]. V.Kulkarni,R.Sharma, M.Hote, Factors Affecting Material Management on Construction Site, International Research Journal of Engineering and Technology,(2017) Volume 4, Issue 01, pp 112-117.

Abstract: Clean and safe drinking water is a basic need for humans and animal world over. To get good water quality, several water treatment methods are being used. This paper adopts groundnut shell as source of activated carbon for drinking water treatment. The groundnut shell was separated from peels using threshing method and washed the shell repeatedly with tap water in order to remove all the dirt's and other contaminant. It was further washed with distilled water and sun dried for three (3) days. The dried sample was ground to obtain a powder forms. It was sieved with a 500μm mesh and stored in airtight container, 300g of the powdered sample. The groundnut........

[1]. Aarti S., Zhehu, B., Usman, U., and Ali Azad (2018) Dairy Waste Treatment Plant in Removal of Organic Pollution: Case Study in Sanan daji, Iran. Environmental Health Engineering and Management Journal. 2(3):73-77.
[2]. Ado, A., Tukur, A. I., Ladan, M., Gumel, S. M., Muhammad, A. A., Habibu, S., and Koki, I. B. (2018). A Review on Industrial Effluents as Major Sources of Water Pollution in Nigeria. Chemistry Journal, 1 (5):159-164.
[3]. Alluri, H.K. (2017). Bio sorption, an Ecofriendly Alternative for Heavy Metal Removal. African
[4]. Journal of Biotechnology, 6(25), 29-31.
[5]. Agarwal GS, Bhuptawat HK,Chaudhari S., Biores (2006). The capability of some Agricultural Wastes for Removing Some Heavy Metals from Polluted Water Stocked In Combination.