Modeling and optimization of tensile strength and modulus of polypropylene/kenaf fiber biocomposites using Box-Behnken response surface method

2017 ◽  
Vol 39 ◽  
pp. E463-E479 ◽  
Author(s):  
Hessameddin Yaghoobi ◽  
Abdolhossein Fereidoon
2014 ◽  
Vol 660 ◽  
pp. 322-326
Author(s):  
Kondapalli Siva Prasad ◽  
Chalamalasetti Srinivasa Rao ◽  
Damera Nageswara Rao

AISI 304L is an austenitic Chromium-Nickel stainless steel offering the optimum combination of corrosion resistance, strength and ductility. These attributes make it a favorite for many mechanical components. The paper focuses on developing mathematical model to predict ultimate tensile strength of pulsed current micro plasma arc welded AISI 304L joints. Four factors, five level, central composite rotatable design matrix is used to optimize the number of experiments. The mathematical model has been developed by response surface method. The adequacy of the model is checked by ANOVA technique. By using the developed mathematical model, ultimate tensile strength of the joints can be predicted with 99% confidence level. Contour plots are drawn to study the interaction effect of pulsed current micro plasma arc welding parameters ultimate tensile strength of AISI 304L steel. The developed mathematical model has been optimized using Response Surface Method to maximize the ultimate tensile strength.


2014 ◽  
Vol 40 (1) ◽  
pp. 15-22 ◽  
Author(s):  
Gopalakrishnan Kumar ◽  
Periyasamy Sivagurunathan ◽  
Sang-Hyoun Kim ◽  
Peter Bakonyi ◽  
Chiu-Yue Lin

Teknoin ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 45-54
Author(s):  
Kartinasari Ayuhikmatin Sekarjati

This research uses material polymethylmethacrylate (PMMA) and hydroxyapatite (HA). The composition of PMMA: MMA is 1: 1 with the ratio composition of HA to PMMA powder is 0.50: 1 (w/w). The composition will be printed with a 3D Bioprinter that has 1.5 mm nozzle. The parameters of the 3D Bioprinter`s tested are perimeter speed with a range of 20 mm/s, 30 mm/s and 40 mm/s, infill speed with a range of 50 mm/s, 60 mm/s, and 70 mm/s, and fill density with a range of 40 mm/s, 50 mm/s and 60 mm/s. These parameters were optimized using response surface method with Minitab software 17. The design of specimens to be printed with a 3D Bioprinter machine using ASTM D638 Type 1. This design will be tested with dimensional measurement and tensile strength. The result of this study is indicated the optimal point at 31.15 mm/s for the perimeter speed`s parameter, 58.84 mm/s for the infill speed`s parameter and 64% for the fill density`s parameter. Dimension of the design is added with a scale of 1: 1.02 mm for length`s dimensions, 1: 1.08 mm for width`s dimensions, 1: 1.09 mm for narrow width`s dimensions and 1: 1.17 mm for thick`s dimensions.


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