scholarly journals Gradient elasticity: a transformative stress analysis tool to design notched components against uniaxial/multiaxial high-cycle fatigue

2016 ◽  
Vol 39 (8) ◽  
pp. 1012-1029 ◽  
Author(s):  
C Bagni ◽  
H Askes ◽  
L Susmel
Keyword(s):  
Stress Analysis ◽  
High Cycle Fatigue ◽  
Gradient Elasticity ◽  
Analysis Tool ◽  
Cycle Fatigue ◽  
Notched Components

The Engine Connecting Rod Strength Evaluation and Fatigue Analysis

2012 ◽  
Vol 549 ◽  
pp. 812-815
Author(s):  
Yu Qing Zheng ◽  
Zhen Lin Wang ◽  
He Ji Ke ◽  
Bing Li
Keyword(s):  
Stress Analysis ◽  
High Cycle Fatigue ◽  
Gasoline Engine ◽  
Fatigue Analysis ◽  
Inertia Force ◽  
Cycle Fatigue ◽  
Connecting Rod ◽  
Design Strength ◽  
Explosion Pressure ◽  
Simulation Results

In this paper, all parts of the gasoline engine connecting rod were assembled and the stress analysis was executed in two working cases of the maximum explosion pressure and the maximum inertia force based on ABAQUS. According to the simulation results from two above working cases, the engine connecting rod strength was evaluated comprehensively, which could satisfy the rod design strength requirement. And meanwhile the high cycle fatigue analysis of the connecting rod was also completed in fatigue safe module. The fatigue simulation result showed that the safety factor was greater than the specified value and the connecting rod was reliable.

P18 Very high cycle fatigue strength of notched components of bearing steel

2006 ◽  
Vol 2006 (0) ◽  
pp. 555-556
Author(s):  
Yoshiaki AKINIWA ◽  
Hirotaka TSURU ◽  
Ayuko NAKAMURA ◽  
Keisuke TANAKA
Keyword(s):  
Fatigue Strength ◽  
High Cycle Fatigue ◽  
Bearing Steel ◽  
Cycle Fatigue ◽  
Very High Cycle Fatigue ◽  
Very High ◽  
Notched Components

Effective Local Flexural Stiffness of Ball Grid Array Assemblies

2002 ◽  
Vol 124 (3) ◽  
pp. 192-197
Author(s):  
Jung-Chuan Lee ◽  
Mostafa Rassaian
Keyword(s):  
Stress Analysis ◽  
High Cycle Fatigue ◽  
Beam Theory ◽  
Ball Grid Array ◽  
Circuit Board ◽  
Flexural Stiffness ◽  
Cycle Fatigue ◽  
Analysis Method ◽  
Layered Beam ◽  
Local Stiffness

Parts on the circuit board serve as reinforcements and produce local stiffness, which influences the deflection of the assembly under vibration. The curvature of the circuit board, combined with material properties, produces stresses that lead to the high-cycle fatigue failure of interconnecting soldering joints. Use of a conventional finite element method (FEM)—referred to as “h-method”—for circuit board analysis is cost prohibitive, as numerous parts, each containing many soldering joints, would need to be analyzed for a typical board. Instead, a direct-stress analysis method—referred to as the multi-domain method (MDM)—can be used to calculate effective local stiffness of ball grid array assemblies. The fast and accurate MDM is based on nested multi-field displacement superposition and is similar in concept to p-type FEM. It is similar to conventional FEM only in its use of the Rayleigh-Ritz methodology. The computational advantages of MDM over conventional FEM for computing thermal stresses caused by thermal coefficient mismatch have been documented previously. In present work, the use of MDM as a direct-stress analysis method to extract the effective local stiffness of ball grid-array assemblies for determining high-cycle fatigue life has been extended. This method simulates a three-point bend test for flexural stiffness calculation. It demonstrates that the force-deflection relationship at the center of the system can be accurately achieved with proper constraints at the ends. The flexural stiffness is then calculated on the basis of beam theory. This calculation produces numerical results for various part-board connections, both with and without underfill. The accuracy of the formulation is examined for layered assembly. The results for long-layered beam theory agree with those based on layered beam theory.

High Cycle Fatigue and Fatigue Crack Propagation Behaviors of Modified A7075-T73 Alloy

2014 ◽  
Vol 52 (4) ◽  
pp. 283-291 ◽  
Author(s):  
Gwan Yeong Kim ◽  
Kyu Sik Kim ◽  
Joong Cheol Park ◽  
Shae Kwang Kim ◽  
Young Ok Yoon ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
High Cycle Fatigue ◽  
Cycle Fatigue
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