Finite element analysis and optimization of stress and strain of QFN solder joints under three-point bending

In order to solve the cracking and poor reliability problems of motor box of Horizontal Roadheader, the static structural FEA (Finite Element Analysis) of cutting arm & motor box of the EBH160 Horizontal Roadheader was conducted, and the stress and strain contours of FEA were obtained. By comparing the calculated results, the safety factor of cutting arm & motor box was 1.36, which provides a reference for the optimal design of cutting arm & motor box.

Download Full-text

Prediction of Thermal Fatigue Life of Lead-Free BGA Solder Joints by Finite Element Analysis

MATERIALS TRANSACTIONS ◽

10.2320/matertrans.42.809 ◽

2001 ◽

Vol 42 (5) ◽

pp. 809-813 ◽

Cited By ~ 10

Author(s):

Young-Eui Shin ◽

Kyung-Woo Lee ◽

Kyong-Ho Chang ◽

Seung-Boo Jung ◽

Jae Pil Jung

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Fatigue Life ◽

Thermal Fatigue ◽

Solder Joints ◽

Lead Free ◽

Element Analysis ◽

Thermal Fatigue Life

Download Full-text

Finite Element Analysis of Drilling Frame on Down-the-Hole Drill Based on Mechanical Mechanics and Mechanical Properties

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.908.282 ◽

2014 ◽

Vol 908 ◽

pp. 282-286

Author(s):

Wan Rong Wu ◽

Lin Chen

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Working Condition ◽

Slenderness Ratio ◽

Stress And Strain ◽

Limit States ◽

Element Analysis ◽

Practical Engineering ◽

Structure Strength ◽

Strength And Stiffness

Drilling frame on TD165CH Down-The-Hole Drill that has large slenderness ratio and be longer than 10m is one component of Down-The-Hole drill which is mainly subjected to load.In the process of drilling, drilling frame is not only subjected to loads which are like tensile, compression and torsion and so on, and be under the influence of impacting and vibration of impactor,the situation of force is complicated.By analysing of working condition of Down-The-Hole drill,there get all kinds of limit states of typical working conditions, and then using Ansys doing finite element analysis, there get distribution of the stress and strain of drilling frame and the result of modal analysis to check whether drilling frame meets the requirements of strength and stiffness or not,and whether it is possible to resonate with the impactor or not.By analysis,Structure strength and stiffness of drilling Frame on TD165CH Down-The-Hole drill meet the requirements of practical engineering, and drilling Frame does not resonate with the impactor.

Download Full-text

Finite Element Analysis on Rack and Pinion of Roadheader

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.791-793.718 ◽

2013 ◽

Vol 791-793 ◽

pp. 718-721

Author(s):

Man Man Xu ◽

Yu Li ◽

Sai Nan Xie ◽

Qing Hua Chen

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Spur Gear ◽

Stress And Strain ◽

Analysis Method ◽

Element Analysis ◽

The Road ◽

The Finite Element Analysis ◽

Gear Rack ◽

Stress And Strain Distribution

To analyse the road-header rack and pinion by using the finite element analysis software COSMOS/WORKS. Compared to the traditional analytic calculation and numerical analysis method, it is more intuitively get 28 ° pressure angle spur gear rack meshing stress and strain distribution, which can rack and pinion improvements designed to provide scientific reference.

Download Full-text

Finite Element Analysis of Needle Insertion Angle in Insulin Therapy

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.16.4.2019.21.0555 ◽

2019 ◽

Vol 16 (4) ◽

pp. 7512-7523

Author(s):

Syakirah Mohamed Amin ◽

Muhammad Hanif Ramlee ◽

Hadafi Fitri Mohd Latip ◽

Gan Hong Seng ◽

Mohammed Rafiq Abdul Kadir

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Insulin Therapy ◽

Maximum Stress ◽

Three Dimensional ◽

Needle Insertion ◽

Stress And Strain ◽

Medical Doctors ◽

Element Analysis ◽

Biomechanical Evaluation

Millions in the world suffering diabetes mellitus depends on insulin therapy to control their blood glucose level daily. However, the painful daily injections they need to take could lead to other complications if it is not done correctly. To date, it is suggested by many researchers and medical doctors that the needles should be inserted at any angles of 90º or 45º. Nevertheless, this recommendation has not been supported by clinical or biomechanical evaluation. Hence, this study evaluates the needle insertion for insulin therapy to find the favourable angles in order to reduce injury and pain onto the skin. Finite element analysis was done by simulating the injection of three-dimensional (3D) needle model into a 3D skin model. The insertions were simulated at two different angles, which are 45ºand 90º with two different lengths of needles; 4 mm and 6 mm. This study concluded the favourable angle for 4 mm needle to be 90º while 6 mm needle was best to be inserted at 45º as these angles exerted the least maximum stress and strain onto the skin.

Download Full-text

CAD/CAE on the Mould Plates of Vertical Type High-Pressure Grouting Machine

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.538-541.2681 ◽

2012 ◽

Vol 538-541 ◽

pp. 2681-2684

Author(s):

Zhi Cheng Huang

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

High Pressure ◽

3D Model ◽

Stress And Strain ◽

Analysis Software ◽

Element Analysis ◽

Pressure Grouting ◽

Object Of Study

Took a type of ceramics for daily use vertical type high pressure grouting machine as the object of study, study the stress and strain of its upper and lower mould plates. Established their 3D model by CAD software Pro-E, and then import them into finite element analysis software to analysis the value and distribution of the stress and strain. The analysis results can provide some reference for design, and have some engineering and practical value.

Download Full-text

Experimental and Finite Element Analysis Approach for Fatigue of Unidirectional Fibrous Composites

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.87.106 ◽

2011 ◽

Vol 87 ◽

pp. 106-112 ◽

Cited By ~ 3

Author(s):

Amiri Asfarjani Alireza ◽

Adibnazari Sayid ◽

Reza Kashyzadeh Kazem

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Fatigue Testing ◽

Micromechanical Model ◽

Weight Ratio ◽

Life Time ◽

Fibrous Composites ◽

Element Analysis ◽

Three Point Bending ◽

The Finite Element Analysis

Fibrous composites are finding more and more applications in aerospace, automotive, and naval industries. They have high stiffness and strength to weight ratio and good rating in regards to life time fatigue. Investigating mechanical behavior under dynamic loads to replace this material is very important. In the present article, investigate Fatigue of Unidirectional Fibrous Composites by using finite element analysis. So, to achieve this purpose Firstly, modeling fiber and matrix in separate case and simulated semi actual conditions, attained S-N curve of fiber and matrix and after that by using micromechanical model of combination fiber and matrix can approach S-N curve of Unidirectional Fibrous Composites. Finally, Comparisons of the finite element analysis of Ansys and the experimental predictions indicate based on three point bending fatigue testing that the results are satisfactorily in good agreement with each other which approves the power law assumption in the model.

Download Full-text

A Nonlinear and Time Dependent Finite Element Analysis of Solder Joints in Surface Mounted Components Under Thermal Cycling

MRS Proceedings ◽

10.1557/proc-226-23 ◽

1991 ◽

Vol 226 ◽

Cited By ~ 18

Author(s):

Yi-Hsin Pao ◽

Kuan-Luen Chen ◽

An-Yu Kuo

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Thermal Cycling ◽

Solder Joints ◽

Free Edge ◽

Time Dependent ◽

Element Analysis ◽

Finite Element Program ◽

Element Program ◽

Peel Stress

AbstractA nonlinear and time dependent finite element analysis was performed on two surface mounted electronic devices subjected to thermal cycling. Constitutive equations accounting for both plasticity and creep for 37Pb/63Sn and 90Pb/10Sn solders were assumed and implemented in a finite element program ABAQUS with the aid of a user subroutine. The FE results of 37Pb/63Sn solder joints were in reasonably good agreement with the experimental data by Hall [19]. In the case of 9OPb/1OSn solder in a multilayered transistor stack, the FE results showed the existence of strong peel stress near the free edge of the joint, in addition to the anticipated shear stress. The effect of such peel stress on the crack initiation and growth as a result of thermal cycling was discussed, together with the singular behavior of both shear and peel stresses near the free edge.

Download Full-text