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Creep of Sn-0.3Ag-0.7Cu solder in electronic packaging: Experiment and simulation
Published 2025-01-01“…In contemporary society, the growing reliance on electronic devices has necessitated the phasing out of traditional Sn–Pb solder due to its health hazards, prompting a transition to environmentally friendly, lead-free alternatives.This study aims to address the challenges of poor interfacial reliability and high cost associated with eutectic Sn–Ag–Cu solders by investigating the creep properties and service life of a low-silver solder alloy, Sn-0.3Ag-0.7Cu, as a filler material.The creep behavior of Sn-0.3Ag-0.7Cu was analyzed through creep testing, and fracture modes were identified via microstructural and fracture surface analysis.The Anand viscoplastic model was employed to simulate and calibrate the creep behavior, with its accuracy validated via thermal cycling experiments.Furthermore, the creep behavior of Ball Grid Array (BGA) solder joints was simulated using Abaqus software to examine the impact of creep on joint longevity and the influence of temperature on performance.…”
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22
Study on Creep Characteristics of Expansive Soil in High-Fill Channel of South-to-North Water Transfer Project
Published 2020-01-01“…In the current study, the creep test of expansive soil under different moisture content and dry density was carried out. …”
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Creep Mechanical Properties of Granite under Combined Axial Compression and Water Pressure and Support Characteristics of Surrounding Rock
Published 2022-01-01“…In this paper, taking the surrounding rock of a large underground cavern in Yebatan Hydropower Station as research object, creep mechanical test of the combined axial pressure and water pressure under normal water level and dead water level is carried out, and long-term damage mechanism of rock under different water confining pressures is revealed. …”
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Creep Energy Evolution of Red-Bed Soft Rocks in South China under Chemical-Stress-Seepage Coupling
Published 2024-01-01“…In order to reveal its creep characteristics and mechanism under complex conditions, a step-loading creep test was carried out under chemical-stress-seepage coupling, and the energy evolution law of the whole creep process was analyzed based on linear energy storage and energy dissipation theory. …”
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Extracellular vesicles derived from creeping fat stem cells promote lymphatic function and restrain inflammation of Crohn's disease
Published 2024-12-01“…Next, Interleukin 10 knock‐out (Il‐10−/−) mice were used to assess the biological functions of CrF‐EVs in spontaneous mesenteritis and colitis. …”
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Identifying and Analyzing the Effects of Urban Creep on the Situation Development of Rural Areas around (Case Study: Villages around of Marivan City)
Published 2020-03-01“…In the current applied research, a quantitative and qualitative approach with a spatial and descriptive-analytic approach has been carried out. The main objective of this research is to identify the consequences of the Marivan Creep phenomenon on the changes in the development status of the surrounding villages, Over the last few decades, physical development has been speeding up. …”
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Research on the Creep and Fatigue Evaluation Method of the Double-Layered Annulus Metal Hydride Bed Combined with Numerical Modeling and ASME Code
Published 2022-01-01“…Apart from that, the hydrogen storage bed is also subjected to thermal-mechanical fatigue by the iterative process of absorption and desorption, and its operating temperature range is in the thermal creep temperature region. Based on the distribution of the stress and temperature, evaluation hot sites were selected and the ASME-NB and ASME-NH codes were used to evaluate fatigue and fatigue creep, respectively. …”
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On the Stability of Eccentrically Compressed Reinforced Concrete Elements with a Small Eccentricity, Taking into Account the Rheological Properties of Concrete
Published 2023-04-01“…The loss of stability in a number of cases, obviously, can cause the destruction of not only centrally, but also eccentrically compressed rods with small eccentricities, since under certain conditions they can practically turn out to be close in their work. The stability of these eccentrically compressed rods is calculated by multiple integration. …”
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Assessing the Rheological Behavior of Bio-Asphalt Binder with Integrating Biowaste-Derived Activated Carbon
Published 2024-12-01“…A comprehensive array of evaluations was carried out, encompassing examinations of homogeneity, physical characteristics, Carbon, Hydrogen, Nitrogen, Sulphur, and Oxygen (CHNSO) analysis, proximate analysis, infrared spectroscopy, multiple stress creep and recovery (MSCR), rheological attributes, and temperature sweep. …”
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30
Efficient Modeling Framework for FO-WLP Solder Interconnect Behavior During Thermal Cycling
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31
Representation of Omsk village in guidebooks of All-Union Exhibition of Agriculture (1939–1940)
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32
Studying Engineering Characteristics of Asphalt Binder and Mixture Modified by Nanosilica and Estimating Their Correlations
Published 2018-01-01“…In order to study the effect of NC on the rutting and fatigue properties of modified binders, the multiple stress creep recovery (MSCR) and linear amplitude sweep (LAS) tests were carried out. …”
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Long-Term Deformation Analysis of Recycled Construction Waste Subgrade Filler
Published 2019-01-01“…Long-term deformation tests include laboratory creep tests and field settlement measurement. The creep tests were carried out for about 500 days by a self-made consolidation creep instrument, the creep type of recycled construction waste filler under the test load is stable creep, as the load increases, not only the creep deformation increases but also the time to reach creep stability is longer, and the breakage and compaction of particles are the main reasons for long-term deformation. …”
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STRESS AND STRAIN STATE OF REPAIRING SECTION OF PIPELINE
Published 2015-03-01“…And besides this, the stress and strain state should be determined and controlled in the process of carrying out the repair works. The article presents mathematical model of pipeline’s section straining in viscoelastic setting taking into account soils creep and high-speed stress state of pipeline with the purpose of stresses evaluation and load-supporting capacity of repairing section of pipeline, depending on time. …”
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Elastic-viscoplastic deformation models of salt rocks
Published 2024-08-01“…The use of viscoplastic deformation model makes it possible to point out the fracture regions formed during creep according to a specified strength criterion. …”
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The Influence of Moisture Content on the Time-Dependent Characteristics of Rock Material and Its Application to the Construction of a Tunnel Portal
Published 2015-01-01“…Uniaxial compression creep experiments were carried out for low-grade metamorphic slate samples (located in the southeastern area of Guizhou province, China) with different moisture contents, using an Instron electric-fluid servo-compression machine. …”
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Researches on the Constitutive Models of Artificial Frozen Silt in Underground Engineering
Published 2014-01-01“…In the present study, the triaxial compression and creep tests have been carried out, and the mechanical characteristic of frozen silt is obtained. …”
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Evaluating Long-Term Strength and Time to Failure of Sandstone with Different Initial Damage
Published 2020-01-01“…Numerous studies have been carried out on the LTS for various kinds of rock; however, the effects of initial damage on the LTS and creep failure time of rock have not been conducted. …”
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Study on Mechanical Failure and PermeabilityCharacteristicsof Porous Gas-Bearing Coal under Triaxial Stress
Published 2020-01-01“…To explore the mechanical failure and permeability characteristics of porous gas-bearing coal under triaxial stress, the triaxial compression experiment was carried out for porous and conventional gas-bearing coal samples based on the triaxial creep-seepage experiment system and sound emission signal acquisition system. …”
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Early Cracking Risk Prediction Model of Concrete under the Action of Multifield Coupling
Published 2021-01-01“…According to the ratio of the creep deformation and elastic deformation of concrete which were obtained through the restraint ring experiment, a model for predicting the early creep coefficient of concrete was proposed. …”
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