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Considering the influence of material original flaw, combining with Finite element analysis results and linear elastic fracture mechanics methods, the thesis gave a certain type of casting crane girder for example to analyze its fatigue life including the designing, remaining and service life based on fracture mechanics and the design principle of disrepair-security. It offers more reliable theoretical...
Transducer is the main product which the giant magnetostrictive material applied for and Terfenol-D rod is the core component of the giant magnetostrictive transducer. Using ANSYS software analyzed the radial distribution rules of internal magnetic field intensity on Terfenol-D rod in high-frequency driven, which provided the theoretical guidance for reasonable and effective application of magnetostrictive...
Finite element analysis technology is an effective approach to research on mechanics performance of rubber component, but it is difficult to estabLish accurate finite element analysis model. Uncertainty of rubber parameter make theoretical analysis impossible quantitative. Rubber parameter of single metal floating face seals are gained accurately by adapting the theoretical analysis and tests, which...
In this paper, the strength of the steel plate silo is calculated according to the relevant design specification. The finite element software SAP2000 is used to model and analysis the silo base on the finite element method. The results based on the two methods are compared and the good agreements can be obtained, indicating that the finite element model is correct.
The Cosmos software was used to build the static load finite element model of bus aluminum HS6061-T6 rims for simulating the rotary fatigue test in this paper. In the finite elements analysis, the elements forming the meshes were hexahedral linear elements with eight nodes. The equivalent stress amplitude was calculated based on the nominal stress method by considering the effects of mean load, size,...
This article adopts simulation of finite element analysis combines with laboratory tests to explore the cushion performance of honeycomb board. The finite element modeling methods for honeycomb paperboard structure were studied, which were solid modeling, defining element attributes, and portioning grid method. The flat crush property of the structure was analyzed on the basis of the finite element...
This paper reports the impact of ageing on the cohesive and adhesive strength of overmould materials used in electronic packages. For so-called harsh environment applications, the overmoulded package operates in an ambient at a continuous temperature of 175°C, or sometimes even 200°C. At these high temperatures, it can be expected that the overmould material and its interfaces degrade. In order to...
The technology of 3D IC integration is highly probable to achieve the demand for high performance, better reliability, miniaturization and lower-priced portable electronic products. Since the through silicon via (TSV) is the heart in 3D IC integration architectures, the reliability issues of TSV interconnects should be extremely concerned. Due to the large thermal expansion mismatch among the Cu,...
Delamination between copper and epoxy molding compound (EMC) is one of the common failure modes in packages due to relatively weak adhesion at the interface. Delamination is difficult to predict because a package is often with a complex structure design constructed with different materials and under combined normal and shear loading. Development of cohesive zone elements applied in FEM has emerged...
This paper presents the results of a numerical analysis on the electrical interconnect options of a Power QFN (PQFN) package, to explore and compare the RDS(ON) performance at DC condition. The modeling involves the PQFN 5mm × 6mm package which initially uses Aluminum wire bonds for interconnection. Competition in the market in terms of better electrical performance packages challenge semiconductor...
The reliability of high rock-fill dam slope is a complex systematic reliability analysis, which is one of the core and difficult technological problems in dam design. Based on the deterministic finite element method, the system reliability analysis method of high rock-fill dam slope stability using nonlinear indexes is proposed here by integrating strength reduction method, response surface method,...
Based on illuminating the structure, working principle and force analysis of mobile electron radar, the finite element analysis of sheet metal shell is carried out on ANSYS Workbench (AWE) platform. First, the structure of sheet metal shell is simplified, then the 3D entity model and meshing model of sheet metal parts both are established. Secondly, the material attribute, contact type, load and constraints...
The paper introduces a method combining the calculating result of Ansys which is a emulating software of finite element theory with the dynamic test to obtain the characteristics of the assembled beams, this method have high reliability because the two ways can validate each other, so it is very useful for designing and optimizing the assembled structures.
Accurate material parameters of the door trim panel is a prerequisite to obtain accurate occupant collision responses in full-scale side crash simulation,. However, these parameters are usually difficult to be obtained directly. A side impact sled with the real door and B pillar was developed in this paper. The injury parameters of the side impact dummy (ES-2) were obtained from sled tests. The finite...
Based on the Hertz linear elastic contact theory, the maximum contact pressure and contact width of wheel-rail are obtained. It follows the oval distribution regularly in combination with the formulation of contact pressure. Referring to contact width, the contact area is defined by redevelopment. Nonlinear contact problem has been analyzed by applying three dimensional finite element model. It is...
Die in den im Stahlbau zur Vermeidung von Sprödbrüchen neu eingeführten bruchmechanischen Regeln getroffene Voraussetzung, dass bereits ein Riss in der Konstruktion vorhanden ist, gibt für vorwiegend ruhend beanspruchte Konstruktionen die Veranlassung, ein Kriterium für die Rissenstehung zu suchen. Dieses ergibt sich als Kriterium für die erste Hauptdehnung, wobei deren kritischer Wert von Parametern...
Excavation in soft soil will lead to changes in stress state ground mass and subsequent ground losses inevitably occur. These changes affect the surrounding ground in the form of lateral movement which eventually impose direct strains onto nearby structures and can cause pile deviation and cracks. This study models the lateral movement in soft clay due to excavation using finite element simulation...
Particulate discharging for a coal silo is simulated by using distinct element method. In this paper, the mobility of coal particles in the silo and varieties of individual particle's displacement and velocity in the flow are observed. Both static pressure and dynamic pressure are measured, and also the changes of pressure on the plane of the hopper. All of the above show the flow characteristics...
Thermal resistance data were collected using two different style flip chip ball grid array (FCBGA) packages; one with an exposed molded die and a second with a lid. Eleven different heat sink designs and two different thermal interface materials (TIM) were tested to quantify the thermal interaction between heat sink size, base material and TIM resistance as a function of package style. Package style...
In this paper the development of the structural design of a deployable helical antenna made from fiber composite material as well as its deployment verification in Zero-G environment will presented. In the introduction the advantages of helical antennas will be pointed out and a potential field of application, the receiving of AIS (Automatic Identification System) signals from maritime vessels, will...
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