GRID INDEPENDENT STUDY ON TETRAHEDRAL AND HEXAHEDRAL DOMINANT ELEMENTS TYPES IN FINITE ELEMENT ANALYSIS OF INTEGRATED CIRCUIT PACKAGE

2017 ◽  
Vol 79 (5-2) ◽  
Author(s):  
Khairul Fadzli Samat ◽  
Rosidah Jaafar ◽  
Muhammad Idzdihar Idris ◽  
Vincent Ong, Maidin, S. ◽  
Mohd Shahir Kasim ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Integrated Circuit ◽  
Maximum Stress ◽  
Independent Study ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Tetrahedral Element ◽  
Element Type ◽  
Ic Package

The development of integrated circuit (IC) packaging is one of the important factors for the advanced production of the semi-conductor industry. With the recent rise of innovative demand of the production technology, lot of issues had been raised at the manufacturing level especially at back-end production. In order to solve the problem, finite element analysis (FEA) is one of the methods that has been broadly used to evaluate the internal stress of IC package. The performance effect of tetrahedral or hexahedral dominance elements in the meshing stage may lead to the unswerving of FEA results. In such condition, the performance of the element type needs to be analyzed in order to determine which implementation leads to result with higher confident level. This study used the quasi-static simulation of FEA to determine the performance of tetrahedral and hexahedral dominance elements in FEA of IC package strength. The monitored stress was focused on the component levels of IC package, the die and the diepad. The IC package is modelled in three-dimensional case which represented as close as the actual product by simplifying certain parts. The performance evaluation had considered the effect of grid independent study for each of the element type. The maximum stress produced by using the tetrahedral element had been compared with the stress produced by the hexahedral dominance elements. Comparison of the performance showed that the value of the maximum stress produced from hexahedral dominance element was significantly higher at 16% to 40% than the solution obtained from the tetrahedral element. It is found that by using hexahedral element in the finite element analysis, a significant higher value of Von Mises stress is produced, which is more than 505 MPa in diepad. This stress value has been established by previous study within the plastic deformation range and also has good agreement with the physical examination. 

scholarly journals Stress Distribution in Implant-Supported Overdenture and Peri-Implant Bone Using Three Attachment Systems: A Finite Element Analysis

2021 ◽  
Vol 13 (2) ◽  
pp. 57-61
Author(s):  
Alireza Izadi ◽  
Fariboorz Vafaie ◽  
Armaghan Shahbazi ◽  
Mohamad Taghi Mokri vala
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Maximum Stress ◽  
Titanium Implants ◽  
Load Application ◽  
Von Mises Stress ◽  
Bone Block ◽  
Element Analysis ◽  
Minimum Stress

Background: This finite element analysis (FEA) evaluated stress distribution in implant-supported overdenture (ISO) and peri-implant bone using one extracoronal (ball) and two intracoronal (locator and Zest Anchor Advanced Generation (ZAAG)) attachment systems. Methods: In this in vitro study, the mandible was modelled in the form of an arc-shaped bone block with 33 mm height and 8 mm width. Two titanium implants were modelled at the site of canine teeth, and three attachments (ZAGG, locator, and ball) were placed over them. Next, 100 N load was applied at 90° and 30° angles from the molar site of each quadrant to the implants. The stress distribution pattern in the implants and the surrounding bone was analyzed, and the von Mises stress around the implants and in the crestal bone was calculated. Results: While minimum stress in peri-implant bone following load application at 30° angle was noted in the mesial point of the locator attachment, maximum stress was recorded at the distal point of the ball attachment following load application at 90° angle. Maximum stress around the implant following load application at 90° angle was noted in the lingual point of the ball attachment while minimum stress was recorded in the lingual point of the locator attachment following load application at 90° angle. Conclusions: According to the results, the locator attachment is preferred to the ZAAG attachment, and the ball attachment should be avoided if possible.

scholarly journals Evaluation of Stress Distribution and Force in External Hexagonal Implant: A 3-D Finite Element Analysis

2021 ◽  
Vol 18 (19) ◽  
pp. 10266
Author(s):  
Vinod Bandela ◽  
Ram Basany ◽  
Anil Kumar Nagarajappa ◽  
Sakeenabi Basha ◽  
Saraswathi Kanaparthi ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Maximum Stress ◽  
Axial Direction ◽  
Von Mises Stress ◽  
P Value ◽  
Implant Surface ◽  
Element Analysis ◽  
Von Mises

Purpose: To analyze the stress distribution and the direction of force in external hexagonal implant with crown in three different angulations. Materials and Methods: A total of 60 samples of geometric models were used to analyze von Mises stress and direction of force with 0-, 5-, and 10-degree lingual tilt. Von Mises stress and force distribution were evaluated at nodes of hard bone, and finite element analysis was performed using ANSYS 12.1 software. For calculating stress distribution and force, we categorized and labeled the groups as Implant A1, Implant A2, and Implant A3, and Implant B1, Implant B2, and Implant B3 with 0-, 5-, and 10-degree lingual inclinations, respectively. Inter- and intra-group comparisons were performed using ANOVA test. A p-value of ≤0.05 was considered statistically significant. Results: In all the three models, overall maximum stress was found in implant model A3 on the implant surface (86.61), and minimum was found on model A1 in hard bone (26.21). In all the three models, the direction of force along three planes was maximum in DX (0.01025) and minimum along DZ (0.002) direction with model B1. Conclusion: Maximum von Mises stress and the direction of force in axial direction was found at the maximum with the implant of 10 degrees angulation. Thus, it was evident that tilting of an implant influences the stress concentration and force in external hex implants.

scholarly journals KERUSAKAN DAN PERANCANGAN ULANG ALTERNATIF GIRDER PADA LINTASAN TRIPPER SESUAI SNI 03-1729-2002

2016 ◽  
Vol 17 (3) ◽  
pp. 167
Author(s):  
Djoko W Karmiadji ◽  
Rhandi Mulia ◽  
Eddy Djatmiko
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Maximum Stress ◽  
Von Mises Stress ◽  
Structural Failure ◽  
Element Analysis ◽  
Mechanical Calculation ◽  
Design Alternatives ◽  
Von Mises ◽  
Calculation Analysis

<p>Abstrak<br />Kegagalan fungsi girder pada lintasan tripper yang sering terjadi disebabkan oleh keretakan pada penopang silang dan tegak, terjadinya defleksi berlebih pada batang utama, dan perubahan posisi pada kedua kolom. Kerusakan strukur diakibatkan oleh ketidaksesuaian pembebanan yang diterima, sehingga memperlemah komponennya dan dapat berakibat runtuhnya struktur girder. Studi dilakukan dengan mengkaji desain yang sudah ada melalui pendefenisian pembebanan, selanjutnya melakukan perhitungan mekanika pada tiga model pembebanan yang berbeda dan pengecekan kelayakan desain dengan metode LRFD berdasarkan SNI 03-1729-2002 dengan validasi menggunakan analisis elemen hingga. Hasil menunjukkan terjadinya ketidaksesuaian pembebanan yang berakibat kerusakan girder, sehingga diperlukan desain alternatif melalui pemilihan profil, perhitungan kelayakan profil dan analisis ulang untuk memastikan kehandalan rancangan. Dari hasil analisis perhitungan dapat disimpulkan bahwa desain alternatif mempunyai kehandalan yang memadai yaitu defleksinya 0,35 mm dibanding desain lama 15,96 mm berdasarkan perhitungan mekanik, sedangkan hasil analisis elemen hingga, defleksi desain baru 1,08 mm dan desain lama 10,37 mm. Tegangan maksimum desain baru adalah aman terhadap material yang digunakan, yaitu SS400 dengan kekuatan sebesar 245 MPa, dimana hasil perhitungan mekanika diperoleh tegangan maksimum desain baru 52,00 MPa, sedangkan tegangan maksimum hasil analisis elemen hingga adalah 56,31 MPa dan tegangan Von Mises 143,39 MPa.<br />Kata kunci : girder, tripper, LFRD, elemen hingga, Standar Nasional Indonesia (SNI).</p><p><br />Abstract<br />Malfunction of girder on track tripper that often occurred is caused by cracks in the cross and upright supports, occurrence of excessive deflection on main bar, and a change in position of the both columns. Structural failure is caused by loading discrepancies received, so it is weaken its components and resulted in the collapse of the girder structure. The study was conducted by reviewing existing design through loading analysis, then performing the mechanical calculation on three different loading models and checking the feasibility of the design with LRFD method based on SNI 03-1729-2002 with validation using finite element analysis. Results showed the loading discrepancies resulting in damaged girder, so it is necessary to make design alternatives through the selection of profiles, re-calculation and feasibility analysis of the beam to ensure the reliability of the design. From the calculation analysis, it can be concluded that the alternative design has adequate reliability. Based on mechanical calculations the deflection is 0.35 mm compared to 15.96 mm of the old design, while the result of finite element analysis determine 1.08 mm deflection of the new design and 10.37 mm in old design. The maximum stress of the new design is safe for the material used, ie SS400 with a strength of 245 MPa, wherein mechanical calculation resulted in obtained maximum stress of the new design is 52.00 MPa, while the maximum stress through finite element analysis result is 56.31 MPa and Von Mises stress is 143.39 Mpa.<br />Keywords: girder, tripper, LFRD, finite element, National Indonesian Standard (SNI).</p>

Finite element analysis of endodontically treated tooth restored with different posts under thermal and mechanical loading

2011 ◽  
Vol 1 (3) ◽  
pp. 75 ◽  
Author(s):  
Ozkan ADIGÜZEL ◽  
Senem YİĞİT ÖZER ◽  
Emrullah BAHŞİ ◽  
İzzet YAVUZ
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Loading ◽  
Maximum Stress ◽  
Von Mises Stress ◽  
Stress Concentrations ◽  
Element Analysis ◽  
Endodontically Treated Tooth ◽  
Von Mises ◽  
Titanium Post

Aim: This study compared the stress distributions of endodontically treated tooth restored with carbon and titanium post under thermal and mechanical loading conditions. Methodology: A 3-dimensional finite element model was created to represent in a labiolingual cross-sectional view of an endodontically treated maxillary central incisor tooth with its supporting structures. It was modified according to two post systems with different physical properties consisting titanium, and carbon fiber. Stress distribution and stress values were then calculated by considering the three dimensional von Mises stress criteria. Results: A 100-N static vertical occlusal load was applied on the node at the center of occlusal surface of the tooth. The von Mises stress values for carbon post model was on the coronal third and the cervical area of the root in the range of 436,16 and 3,59 MPa,  for titanium post model was 590,55 and 3,05 MPa. Thermal stress values for carbon post model showed that maximum stress concentrations were noted on the coronal third and the top of the post area of the root in the range of 509,94 and 6,38 MPa. Titanium post model showed that maximum stress concentrations were noted on the coronal third and top of the post area of the root in the range of 1165,06 and 3,06 MPa. Conclusion: This study shows that the titanium post yields larger stresses than the carbon post under thermal conditions.  How to cite this article: Adıgüzel Ö, Yiğit Özer S, Bahşi E, Yavuz İ. Finite element analysis of endodontically treated tooth restored with different posts under thermal and mechanical loading. Int Dent Res 2011;3:75-80. Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

scholarly journals Finite Element Analysis of Stress in Bone and Abutment-Implant Interface under Static and Cyclic Loadings

2020 ◽  
Author(s):  
Saeed Nokar ◽  
Hamid Jalali ◽  
Farideh Nozari ◽  
Mahnaz Arshad
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Concentration ◽  
Stress Distribution ◽  
Maximum Stress ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Bone Implant ◽  
Factors Affecting ◽  
Von Mises

Objectives: The success of implant treatment depends on many factors affecting the bone-implant, implant-abutment, and abutment-prosthesis interfaces. Stress distribution in bone plays a major role in success/failure of dental implants. This study aimed to assess the pattern of stress distribution in bone and abutment-implant interface under static and cyclic loadings using finite element analysis (FEA). Materials and Methods: In this study, ITI implants (4.1×12 mm) placed at the second premolar site with Synocta abutments and metal-ceramic crowns were simulated using SolidWorks 2007 and ABAQUS software. The bone-implant contact was assumed to be 100%. The abutments were tightened with 35 Ncm preload torque according to the manufacturer’s instructions. Static and cyclic loads were applied in axial (116 Ncm), lingual (18 Ncm), and mesiodistal (24 Ncm) directions. The maximum von Mises stress and strain values ​​were recorded. Results: The maximum stress concentration was at the abutment neck during both static and cyclic loadings. Also, maximum stress concentration was observed in the cortical bone. The loading stress was higher in cyclic than static loading. Conclusion: Within the limitations of this study, it can be concluded that the level of stress in single-unit implant restorations is within the tolerable range by bone.

Bionic design of the tower for wind turbine

2021 ◽  
pp. 095440622110046
Author(s):  
Yuqiao Zheng ◽  
Fugang Dong ◽  
Huquan Guo ◽  
Bingxi Lu ◽  
Zhengwen He
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Maximum Stress ◽  
Natural Frequencies ◽  
Bionic Design ◽  
Analytic Hierarchy ◽  
Element Analysis ◽  
Maximum Deformation ◽  
Overall Stability ◽  
Biological Selection

The study obtains a methodology for the bionic design of the tower for wind turbines. To verify the rationality of the biological selection, the Analytic Hierarchy Procedure (AHP) is applied to calculate the similarity between the bamboo and the tower. Creatively, a bionic bamboo tower (BBT) is presented, which is equipped with four reinforcement ribs and five flanges. Further, finite element analysis is employed to comparatively investigate the performance of the BBT and the original tower (OT) in the static and dynamic. Through the investigation, it is suggested that the maximum deformation and maximum stress can be reduced by 5.93 and 13.75% of the BBT. Moreover, this approach results in 3% and 1.1% increase respectively in the First two natural frequencies and overall stability.

scholarly journals 3D Finite Element Analysis of Rotary Instruments in Root Canal Dentine with Different Elastic Moduli

2021 ◽  
Vol 11 (6) ◽  
pp. 2547 ◽  
Author(s):  
Carlo Prati ◽  
João Paulo Mendes Tribst ◽  
Amanda Maria de Oliveira Dal Piva ◽  
Alexandre Luiz Souto Borges ◽  
Maurizio Ventre ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Root Canal ◽  
Elastic Moduli ◽  
Reaction Force ◽  
Von Mises Stress ◽  
Elastic Behavior ◽  
Element Analysis ◽  
Heat Treated ◽  
Von Mises

The aim of the present investigation was to calculate the stress distribution generated in the root dentine canal during mechanical rotation of five different NiTi endodontic instruments by means of a finite element analysis (FEA). Two conventional alloy NiTi instruments F360 25/04 and F6 Skytaper 25/06, in comparison to three heat treated alloys NiTI Hyflex CM 25/04, Protaper Next 25/06 and One Curve 25/06 were considered and analyzed. The instruments’ flexibility (reaction force) and geometrical features (cross section, conicity) were previously investigated. For each instrument, dentine root canals with two different elastic moduli(18 and 42 GPa) were simulated with defined apical ratios. Ten different CAD instrument models were created and their mechanical behaviors were analyzed by a 3D-FEA. Static structural analyses were performed with a non-failure condition, since a linear elastic behavior was assumed for all components. All the instruments generated a stress area concentration in correspondence to the root canal curvature at approx. 7 mm from the apex. The maximum values were found when instruments were analyzed in the highest elastic modulus dentine canal. Strain and von Mises stress patterns showed a higher concentration in the first part of curved radius of all the instruments. Conventional Ni-Ti endodontic instruments demonstrated higher stress magnitudes, regardless of the conicity of 4% and 6%, and they showed the highest von Mises stress values in sound, as well as in mineralized dentine canals. Heat-treated endodontic instruments with higher flexibility values showed a reduced stress concentration map. Hyflex CM 25/04 displayed the lowest von Mises stress values of, respectively, 35.73 and 44.30 GPa for sound and mineralized dentine. The mechanical behavior of all rotary endodontic instruments was influenced by the different elastic moduli and by the dentine canal rigidity.

Investigating the Calibration Curves for a Two Component Cutting Tool Lathe Dynamometer Using Finite Element Analysis

2016 ◽  
Vol 24 ◽  
pp. 71-84
Author(s):  
Osezua Obehi Ibhadode ◽  
Ishaya Musa Dagwa ◽  
Akii Okonigbon Akhaehomen Ibhadode
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cutting Tool ◽  
Von Mises Stress ◽  
Equation Modeling ◽  
Element Analysis ◽  
Calibration Curves ◽  
Two Component ◽  
Applied Forces ◽  
Von Mises

Calibration curves of a multi-component dynamometer is of essence in machining operations in a lathe machine as they serve to provide values of force and stress components for cutting tool development and optimization. In this study, finite element analysis has been used to obtain the deflection and stress response of a two component cutting tool lathe dynamometer, for turning operation, when the cutting tool is subjected to cutting and thrust forces from 98.1N to 686.7N (10 to 70kg-wts), at intervals of 98.1N(10kg-wt). By obtaining the governing equation, modeling the dynamometer assembly, defining boundary conditions, generating the assembly mesh, and simulating in Inventor Professional; horizontal and vertical components of deflection by the dynamometer were read off for three different loading scenarios. For these three loading scenarios, calibration plots by experiment compared with plots obtained from simulation by finite element analysis gave accuracies of 79%, 95%, 84% and 36%, 57%, 63% for vertical and horizontal deflections respectively. Also, plots of horizontal and vertical components of Von Mises stress against applied forces were obtained.

Elastic Thermal Stresses in Bimetallic Pipe Welds

1980 ◽  
Vol 102 (4) ◽  
pp. 430-432 ◽  
Author(s):  
R. D. Blevins
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Intensity ◽  
Maximum Stress ◽  
Thermal Stresses ◽  
Simple Expression ◽  
Element Analysis ◽  
Maximum Stress Intensity ◽  
Bimetallic Pipe ◽  
Uniform Change

The elastic thermal stresses in a welded transition between two pipes of the same size but different alloys are explored. A stress-free temperature is postulated and the stress due to a uniform change in temperature is characterized by the maximum stress intensity in the weld. A simple expression for predicting this maximum stress intensity is developed based on the results of finite element analysis.

scholarly journals Simulasi Kekuatan Mekanik Sudu Turbin Angin Horizontal Menggunakan Software Simscale

2021 ◽  
Vol 4 (2) ◽  
Author(s):  
Mubni Nazar ◽  
Anggito Pringgo Tetuko ◽  
Djuhana Djuhana
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Von Mises

Penelitian ini dilakukan untuk meningkatkan koefisien daya yang maksimal. Salah satunya dengan mengunakan kualitas sudu yang baik. Untuk mengoptimalkan fungsi turbin angin penulis menggunakan material sudu pada turbin angin dengan menggunakan Acrylonitrine Butadine Styrene (ABS). Oleh karena itu pada penelitian ini metode yang digunakan adalah metode Finite Element Analysis Simulasi yang dipilih adalah dynamic. Penelitian ini adalah pengujian kekuatan sudu turbin angin horizontal dengan variasi kecepatan angin 10 – 20 m/s ditinjau dari von mises stress dan displacement. Dari hasil simulasi kecepatan angin memiiki pengaruh terhadap distribusi stress dan displacement. Material yang digunakan masih berada di bawah batas kekuatan material, semakin besar gaya yang diberikan semakin besar nilai stress dan displacement. Pada hasil simulasi didapatkan nilai stress minimum 5.8 Pa stress maksimum 22.94 Sedangkan dalam pengujian displacement dihasilkan nilai minimum 1.27 m displacement maksimum 4.99 m.

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