Effect of Design Parameters on Thermomechanical Stress in Silicon of Through-Silicon Via

We examined the effect of the design parameters of a through-silicon via (TSV) on the thermomechanical stress distribution at the bottom of the TSV using finite element analysis. Static analyses were carried out at 350 °C to simulate the maximum thermomechanical stress during postplating annealing. The thermomechanical stress is concentrated in the lower region of a TSV, and the maximum stress in silicon occurs at the bottom of the TSV. The TSV diameter and dielectric liner thickness were two important determinants of the maximum stress in the silicon. The maximum stress decreased with decreasing TSV diameter, whereas the effect of aspect ratio was negligible. A thick dielectric liner is advantageous for lowering the maximum stress in silicon. The minimum dielectric thickness resulting in a maximum stress less than the yield stress of silicon was 520, 230, and 110 nm for via diameters of 20, 10, and 5 μm, respectively. The maximum stress also decreased with the thickness of the copper overburden.

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

Avicenna Journal of Dental Research ◽

10.34172/ajdr.2021.11 ◽

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.

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

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph181910266 ◽

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.

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Comparative Analysis of Stress and Deformation between One-Fenced and Three-Fenced Dental Implants Using Finite Element Analysis

Journal of Clinical Medicine ◽

10.3390/jcm10173986 ◽

2021 ◽

Vol 10 (17) ◽

pp. 3986

Author(s):

Chia-Hsuan Lee ◽

Arvind Mukundan ◽

Szu-Chien Chang ◽

Yin-Lai Wang ◽

Shu-Hao Lu ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Comparative Analysis ◽

Stress Distribution ◽

Dental Implant ◽

Maximum Stress ◽

Vertical Force ◽

Element Analysis ◽

Different Types ◽

Stress And Deformation

Finite element analysis (FEA) has always been an important tool in studying the influences of stress and deformation due to various loads on implants to the surrounding jaws. This study assessed the influence of two different types of dental implant model on stress dissipation in adjoining jaws and on the implant itself by utilizing FEA. This analysis aimed to examine the effects of increasing the number of fences along the implant and to compare the resulting stress distribution and deformation with surrounding bones. When a vertical force of 100 N was applied, the largest displacements found in the three-fenced and single-fenced models were 1.7469 and 2.5267, respectively, showing a drop of 30.8623%. The maximum stress found in the three-fenced and one-fenced models was 13.518 and 22.365 MPa, respectively, showing a drop of 39.557%. Moreover, when an oblique force at 35° was applied, a significant increase in deformation and stress was observed. However, the three-fenced model still had less stress and deformation compared with the single-fenced model. The FEA results suggested that as the number of fences increases, the stress dissipation increases, whereas deformation decreases considerably.

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Effect of design parameters of dental implant on stress distribution: a finite element analysis

International Journal of Engineering & Technology ◽

10.14419/ijet.v9i3.30520 ◽

2020 ◽

Vol 9 (3) ◽

pp. 621

Author(s):

Pooyan Rahmanivahid ◽

Milad Heidari

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Stress Distribution ◽

Dental Implants ◽

Dental Implant ◽

Cancellous Bone ◽

Design Parameters ◽

Element Analysis ◽

Small Surface ◽

Design Factors

Nowadays, root osseointegrated dental implants are used widely in dentistry mainly for replacement of the single missing tooth. The success rate of osseointegrated dental implants depends on different factors such as bone conditions; surgery insertion technique, loading history, and biomechanical interaction between jawbone and implant surface. In recent years, many studies have investigated design factors using finite element analysis with a concentration on major parameters such as diameter, pitch, and implant outlines in the distribution of stress in the bone-implant interface. There is still a need to understand the relationship and interaction of design factors individually with stress distribution to optimize implant structure. Therefore, the present study introduced a new dental implant and investigated the effect of design parameters on stress distribution. The finite element modeling was developed to facilitate the study with a comparison of design parameters. Boundary and loading conditions were implemented to simulate the natural situation of occlusal forces. Based on results, V-shape threads with maximum apex angle caused a high rate of micro-motion and high possibility of bone fracture. Low Von-Mises stress was associated with low bone growth stimulation. Besides, small fin threads did not integrate with cancellous bone and consequently lower stress accommodation. V-5 fin had no extraordinary performance in cancellous bone. Small surface areas of fins did not integrate with the surrounding bone and high-stress concentration occurred at the tail. These fins are recommended as threads replacement. It was concluded that the implant structure had less influence on stress distribution under horizontal loading.

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Investigation of the Effect of Abutment Angle Tolerance on the Stress Created in the Fixture and Screw in Dental Implants Using Finite Element Analysis

Journal of Biomimetics Biomaterials and Biomedical Engineering ◽

10.4028/www.scientific.net/jbbbe.51.63 ◽

2021 ◽

Vol 51 ◽

pp. 63-76

Author(s):

Bijan Mohammadi ◽

Zahra Abdoli ◽

Ehsan Anbarzadeh

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Stress Distribution ◽

Dental Implants ◽

Maximum Stress ◽

Element Analysis ◽

Bone Implant ◽

Implant Placement ◽

And Control ◽

Biomechanical Factors

Today, an artificial tooth root called a dental implant is used to replace lost tooth function. Treatment with dental implants is considered an effective and safe method. However, in some cases, the use of dental implants had some failures. The success of dental implants is influenced by several biomechanical factors such as loading type, used material properties, shape and geometry of implants, quality and quantity of bone around implants, surgical method, lack of rapid and proper implant surface's integration with the jaw bone, etc. The main purpose of functional design is to investigate and control the stress distribution on dental implants to optimize their performance. Finite element analysis allows researchers to predict the stress distribution in the bone implant without the risk and cost of implant placement. In this study, the stresses created in the 3A.P.H.5 dental implant's titanium fixture and screw due to the change in abutment angles tolerance have been investigated. The results show that although the fixture and the screw's load and conditions are the same in different cases, the change of the abutment angle and the change in the stress amount also made a difference in the location of maximum stress. The 21-degree abutment puts the fixture in a more critical condition and increases the chance of early plasticization compared to other states. The results also showed that increasing the abutment angle to 24 degrees reduces the stress in the screw, but decreasing the angle to 21 degrees leads to increased screw stress and brings it closer to the fracture.

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Thermomechanical Stress Distribution Analysis of Junction Box on Silicon Photovoltaic Modules Based on Finite Element Analysis

IEEE Journal of Photovoltaics ◽

10.1109/jphotov.2019.2940530 ◽

2019 ◽

Vol 9 (6) ◽

pp. 1716-1720

Author(s):

Zhao Wu ◽

Shoushou Lyu ◽

Qijun Peng ◽

Huili Han ◽

Denglin Zhu

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Stress Distribution ◽

Distribution Analysis ◽

Element Analysis ◽

Thermomechanical Stress ◽

Photovoltaic Modules

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Influence of Cross Beam on the Stress of Joints in A-Type Pier of a Bridge

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.446-449.1329 ◽

2012 ◽

Vol 446-449 ◽

pp. 1329-1332

Author(s):

Chun Ping Tang ◽

Liang Liang Zhang

Keyword(s):

Numerical Simulation ◽

Finite Element Analysis ◽

Finite Element ◽

Stress Distribution ◽

Maximum Stress ◽

Analysis Software ◽

Element Analysis ◽

Beam Depth ◽

Layer Analysis ◽

High Pier

Non-linear numerical simulation is done on A-type super high pier by using finite element analysis software ANSYS, obtaining the node stress distribution under load in the node area taken in the sequential layer analysis of overall mode. The conclusion is mainly as follows: the change of width and thickness of cross beam exerts slight impact on the maximum stress of the node while the change of cross beam depth impacts the node stress much. From the computation, it can be concluded that proper reduction of cross beam depth is beneficial to the node stress.

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Finite Element Analysis of Stress Distribution in Normal and Osteoporosis Pelvis Models

Materiale Plastice ◽

10.37358/mp.19.4.5274 ◽

2019 ◽

Vol 56 (4) ◽

pp. 840-844 ◽

Cited By ~ 1

Author(s):

Bogdan Veliceasa ◽

Ovidiu Alexa ◽

Paul Dan Sirbu ◽

Alexandru Filip ◽

Edward Rakosi ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Stress Distribution ◽

Maximum Stress ◽

Pelvic Ring ◽

Osteoporotic Bone ◽

Posterior Arch ◽

Element Analysis ◽

Obturator Foramen ◽

Common Understanding

Finite element analysis is the most commonly used methods in orthopedic biomechanical research. The study aims at improving the common understanding of the behavior of the pelvis and the biomechanics of the pelvic ring in a healthy and osteoporosis configuration. We performed a finite element analysis using the ANSYS program. The study mainly focused on bones and the joints and the complex modelling of the ligaments was ignored. The results of our study showed that the stress distribution of the pelvis with osteoporosis was changed compared with normal pelvis. In addition to, in the healthy bone, where the maximum stress values are concentrated around the obturator foramen (anterior arch of the pelvic ring), in the osteoporotic bone, the maximum stress also appear at the posterior arch of the pelvic ring (especially in the sacrum.

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Analysis on Fracture Accident of the Roll and Universal Joint

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.401-403.65 ◽

2013 ◽

Vol 401-403 ◽

pp. 65-68

Author(s):

Xi Wang ◽

Chang Liang Xu

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Stress Distribution ◽

Maximum Stress ◽

Universal Joint ◽

Element Analysis ◽

Power Load ◽

Actual Load ◽

Universal Spindle ◽

The Impact

The fracture accident of roll and universal join are analyzed, and universal spindle forked joint with finite element analysis is analysed, the stress distribution and maximum stress value is obtained. In the impact power load caused by the roll biting stopping is calculated in detail, and the largest actual load and maximum stress in possible is calculated, explaining the cause of fracture of the important parts such as universal spindle forked joint, and putting forward the improvement opinion for the equipment design and using.

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