Effect of the t–m transformation morphology and stress distribution around the crack path on the measured toughness of zirconia ceramics: A case study on Ce-TZP/alumina nanocomposite

2013 ◽  
Vol 33 (3) ◽  
pp. 521-529 ◽  
Author(s):  
Masahiro Nawa ◽  
Kiyotaka Yamada ◽  
Naoki Kurizoe
Keyword(s):  
Stress Distribution ◽  
Crack Path ◽  
Zirconia Ceramics

Employing Cold Spray to Alter the Residual Stress Distribution of Workpieces: A Case Study on Fusion-Welded AA2219 Joints

2020 ◽  
Vol 29 (6) ◽  
pp. 1538-1549
Author(s):  
W. Y. Li ◽  
Y. F. Zou ◽  
F. F. Wang ◽  
X. W. Yang ◽  
Y. X. Xu ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Cold Spray ◽  
Residual Stress Distribution

Lightweight Design of a Multi-Material Suspension Lower Control Arm

2020 ◽  
Author(s):  
Alessandro Messana ◽  
Lorenzo Sisca ◽  
Alessandro Ferraris ◽  
Andrea Giancarlo Airale ◽  
Massimiliana Carello
Keyword(s):  
Carbon Fiber ◽  
Stress Distribution ◽  
Carbon Fibre ◽  
Mechanical Performance ◽  
Lightweight Design ◽  
Design Analysis ◽  
Hybrid Technology ◽  
Mechanical Coupling ◽  
Lower Control Arm

Abstract This paper is focused on the design, analysis and testing of a multi-material (carbon fibre and steel) Lower Control Arm (LCA) of a McPherson suspension for a C segment vehicle. Therefore, starting from the existing component (made of steel), the LCA mass has been reduced by using a hybrid technology, diminishing the steel thickness and adding a carbon fiber tailored cover without compromising the mechanical performance in terms of stiffness and stress distribution. In so doing, it has been possible to evaluate the potential and the capabilities of the hybridization without re-designing the component totally. In particular, it has been developed a specific methodology that combines both virtual and experimental procedures to face the hybridization challenges of mechanical coupling, safety and lightweight. For these reasons, the multi-material lower control arm represents a noticeable case study in which this methodology has been applied, correlated and validated.

Effect of Yield Criterion on Stress Distribution and Maximum Safe Pressure for an Autofrettaged Gun Barrel

2017 ◽  
Vol 67 (5) ◽  
pp. 504
Author(s):  
Amit Bhetiwal ◽  
Sunil Kashikar ◽  
Haribhau Markale ◽  
Shailendra Gade
Keyword(s):  
Stress Distribution ◽  
Yield Criterion ◽  
The Other ◽  
Uniform Thickness ◽  
Theoretical Weight ◽  
Gun Barrel ◽  
Von Mises Criterion ◽  
Tresca Criterion ◽  
Von Mises

<p>World artillery in the present scenario is changing its role from defensive to aggressive nature and is attempting to achieve higher penetration into enemy targets. Even for an autofrettaged gun barrel, higher ranges requirement leads to higher barrel weight and its associated demerits. The design of gun barrel is based on the choice of yield criteria. Tresca yield criterion provides conservative design for a ductile barrel material. On the other hand, more accurate von Mises criterion presents complexity. The two criteria to evaluate various parameters required for design of an autofrettaged gun barrel are compared. The methodology for evaluation of maximum safe pressure, based on von Mises criterion, for an autofrettaged gun barrel is also included in the paper. Based on case study included in the article, for an autofrettaged gun barrel or pressure vessel with uniform thickness, a theoretical weight reduction of approximately 16 per cent is feasible with von Mises criterion as compared to Tresca criterion.</p>

Computational study on interfacial peeling by uniformly distributed loading on aluminum hybrid anti-mechanical vibration panel

2020 ◽  
Vol 34 (07n09) ◽  
pp. 2040043
Author(s):  
Sung-Min Yoon ◽  
Sung-Youl Bae ◽  
Yun-Hae Kim
Keyword(s):  
Stress State ◽  
Stress Distribution ◽  
Loading Condition ◽  
Computational Study ◽  
Mechanical Vibration ◽  
Interfacial Area ◽  
Main Interest ◽  
Mechanical Parts ◽  
Product Thickness

The purpose of this case study is to calculate the critical condition of interfacial peeling on aluminum hybrid anti-mechanical vibration panel. An area of thin-cored resin layer with two aluminum skins is located to design a hybrid panel. The system of hybrid panel is normally used for mechanical parts, which need to dampen mechanical vibration. In this structure, a thin core plays an especially important role to dampen vibration. However, this structure has a disadvantage of delaminating and peeling with perpendicular loading from the adhesive core. At a given level of adhesion, one calculates deflection and stress state as a function of loading. To confirm that this model is directly applicable to the quantity of deflection, the geometry of three layers is designed with actual product thickness. A total of five cases of loading condition are simulated to deduce the stress distribution. The interfacial area is the main interest for this simulation which can be related with critical peeling condition. As a result, the comparison with the practical values of adhesion shows a possibility of estimation for the peeling limit of this hybrid panel system.

scholarly journals A Sophisticated Method of the Mechanical Design of Cable Accessories Focusing on Interface Contact Pressure

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2976
Author(s):  
Yi Luo ◽  
Zhengyi Han ◽  
Mingyu Zhou ◽  
Haitian Wang
Keyword(s):  
Stress Distribution ◽  
Contact Pressure ◽  
Mechanical Design ◽  
Dielectric Strength ◽  
Point Of View ◽  
The Finite Element Method ◽  
Computation Model ◽  
Sophisticated Method ◽  
Interface Contact

The most critical positions of a prefabricated cable accessory, from the electrical point of view, are the interfaces between the stress cone and its surroundings. Accordingly, the contact pressure on those interfaces needs to be carefully designed to assure both good dielectric strength and smooth installation of the stress cone. Nevertheless, since stress cones made from rubber are under large deformation after installation, their internal stress distribution is neither practical to measure directly by planting sensors, nor feasible to compute accurately with the conventional theory of linear structural mechanics. This paper presents one sophisticated method for computing the mechanical stress distribution in rubber stress cones of cable accessories by employing hyperelastic models in a computation model based on the finite element method. This method offers accurate results for rubber bodies of complex geometries and large deformations. Based on the method, a case study of a composite prefabricated termination for extruded cables is presented, and the sensitivity analysis is given as well.

A Three-Dimensional FE Approach for the Stress Analysis of Tensile Armors Inside End Fittings

2019 ◽  
Author(s):  
Marcelo N. R. Miyazaki ◽  
José Renato M. de Sousa ◽  
Gilberto B. Ellwanger
Keyword(s):  
Stress Distribution ◽  
Three Dimensional ◽  
Rigid Surface ◽  
Stress Concentrations ◽  
Flexible Pipes ◽  
Dimensional Finite Element ◽  
Operational Tests ◽  
Three Dimensional Finite Element ◽  
Good Agreement

Abstract In this work, a solid three-dimensional finite element (FE) approach is proposed to investigate the stress distribution along the tensile armors of flexible pipes inside their end fittings (EFs). This approach employs two different models. The first model consists of a single tensile armor, which is meshed with solid FEs, and a rigid surface that represents the EF. A toroidal template is also considered and the EF mounting process is simulated. In the second model, the deformed armor and the stress state from the first model are considered and the voids between the armor and the EF are filled with resin, which is also modeled with solid FEs. Geometric and material nonlinearities are addressed and the interaction between the different components are ensured with contact elements. A case study is conducted to observe the stress distribution along the tensile armor considering typical operational loads. The results obtained are compared to those calculated with a previously proposed analytical model showing good agreement, but also evidencing the need to adequately simulate the EF mounting process and the pre-operational tests. Moreover, intense stress concentrations at the entrance of the EF are observed thus indicating that this region can be critical in fatigue analyses.

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