Finite Element Analysis on Structural Stress of 32x32 InSb Focal Plane Arrays Integrated with Microlens Arrays

Liwen Zhang ; Meiyu Xu ; Ming Shao ; Qian Yu ; Jiacheng Zhao

doi:10.4156/jcit.vol7.issue13.11

Finite Element Analysis on Structural Stress of 8×8 Infrared Focal Plane Array Integrating with Microlens Arrays

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.442.162 ◽

2012 ◽

Vol 442 ◽

pp. 162-166

Author(s):

Li Wen Zhang ◽

Ming Shao ◽

Qiang Yu ◽

Peng Fei Li

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Focal Plane ◽

Maximum Stress ◽

Focal Plane Array ◽

Structural Stress ◽

Element Analysis ◽

Microlens Arrays ◽

Infrared Focal Plane Array ◽

Indium Bump

Based on finite element analysis, the structural stress of 8×8 InSb Infrared Focal Plane Array integrating with microlens arrays dependent on indium bump sizes is systemically researched. Simulation results show that as the diameters of indium bump increase from 16μm to 38μm in step of 2μm, the maximum stress existing in InSb chip first reduces, then increases, and reaches minimum with indium bump diameter 32μm. Yet the maximum stress in the indium bump array is almost unchangeable and keeps at 16.5MPa. The maximum stress in Si readout integrated circuit almost half stress in InSb chip. Besides, the stress appearing on those regions situating just on microlens array is much smaller than its surrounding regions, and the stress distribution is uniform at contacting areas between InSb chip and indium bump.

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Strength-based design of a sunflower stalk cutter machine design using finite element analysis and experimental validation

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/09544062211059741 ◽

2021 ◽

pp. 095440622110597

Author(s):

Gürkan İrsel

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Stress Analysis ◽

Strain Gage ◽

Experimental Validation ◽

Experimental Studies ◽

Fatigue Analysis ◽

Structural Stress ◽

Element Analysis ◽

Strength Based

In this study, the total algorithm of the strength-based design of the system for mass production has been developed. The proposed algorithm, which includes numerical, analytical, and experimental studies, was implemented through a case study on the strength-based structural design and fatigue analysis of a tractor-mounted sunflower stalk cutting machine (SSCM). The proposed algorithm consists of a systematic engineering approach, material selection and testing, design of the mass criteria suitability, structural stress analysis, computer-aided engineering (CAE), prototype production, experimental validation studies, fatigue calculation based on an FE model and experimental studies (CAE-based fatigue analysis), and an optimization process aimed at minimum weight. Approximately 85% of the system was designed using standard commercially available cross-section beams and elements using the proposed algorithm. The prototype was produced, and an HBM data acquisition system was used to collect the strain gage output. The prototype produced was successful in terms of functionality. Two- and three-dimensional mixed models were used in the structural analysis solution. The structural stress analysis and experimental results with a strain gage were 94.48% compatible in this study. It was determined using nCode DesignLife software that fatigue damage did not occur in the system using the finite element analysis (FEA) and experimental data. The SSCM design adopted a multi-objective genetic algorithm (MOGA) methodology for optimization with ANSYS. With the optimization solved from 422 iterations, a maximum stress value of 57.65 MPa was determined, and a 97.72 kg material was saved compared to the prototype. This study provides a useful methodology for experimental and advanced CAE techniques, especially for further study on complex stress, strain, and fatigue analysis of new systematic designs desired to have an optimum weight to strength ratio.

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Fatigue life assessment of welded joints in a crane boom using different structural stress approaches

JOURNAL OF MECHANICAL ENGINEERING AND SCIENCES ◽

10.15282/jmes.13.2.2019.20.0417 ◽

2019 ◽

Vol 13 (2) ◽

pp. 5048-5073

Author(s):

Brahami Riad ◽

Hamri Okba ◽

Sfarni Samir

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Fatigue Life ◽

Fatigue Strength ◽

Industrial Structure ◽

Life Assessment ◽

Structural Stress ◽

Element Analysis ◽

Tubular Joints ◽

Fatigue Life Assessment

This article presents a study of the fatigue strength of welded parts in a crane boom. First, a finite element analysis was carried out over the whole structure. Two critical welded zones were identified and a detailed analysis was carried on them, in the form of sub-models. Three different approaches for estimating the structural stress in welded zones, were presented and applied to each sub-model. Results were compared and discussed. The evaluation of fatigue resistance by the use of appropriate S-N curves for each method was also carried out and discussed. The use of these approaches on a complex industrial structure, and on tubular joints with hollow sections required to perform many adaptations and to solve several difficulties presented hereafter.

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Structural Stress Correction Methods for Linear Elastic Finite Element Analysis of Spot Welded Joints

Volume 9: Mechanics of Solids, Structures and Fluids; NDE, Diagnosis, and Prognosis ◽

10.1115/imece2016-66884 ◽

2016 ◽

Cited By ~ 1

Author(s):

Hong-Tae Kang ◽

Xiao Wu

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Fatigue Life ◽

Welded Joints ◽

Life Prediction ◽

Structural Stress ◽

Test Results ◽

Element Analysis ◽

Linear Elastic ◽

Spot Welded

Structural stress concepts are widely used in fatigue life prediction of spot welds and seam welds in vehicle structures. For fatigue life prediction of welded joints based on the structural stress methods, it is necessary to obtain applied force ranges versus fatigue life of the welded specimens. Then, the force ranges versus fatigue life information is converted to structural stress ranges versus fatigue life (S-N) of the joints. The structural stress ranges versus the fatigue life curve of the welded specimens becomes the material fatigue property of the welded joints to predict fatigue life of joints in vehicle structures. While converting the applied load ranges to the structural stress ranges, linear elastic finite element analysis (FEA) is used. Therefore, the applied load ranges are considered as the responses of linear elastic deformation even though the load ranges consist of the linear elastic deformation and plastic deformation. As results the structural stress ranges of the welded joints are reduced in S-N curve. This study introduces simple techniques for spot welded joints to include the plastic deformation effect on the structural stress calculation without performing elastic-plastic finite element analysis. Fatigue test results of spot welded joints for lap-shear and coach peel specimens of advanced high strength steels (AHSS) and mild steels were used. The corrected structural stress methods showed better correlation with the test results.

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