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The paper presents the failure mode of high-power light emitting diodes (LEDs) under mechanical pressure and verifies the bonding wire as the weakest structure of LEDs. Different lens radiuses and heights are studied to demonstrate the influence of lens parameters on the mechanical strength of LEDs. The experimental results have demonstrated that a LED device has a higher failure force when the lens...
Orthodontic force simulation is very important for the guidance of clinical orthodontic treatment. Previous works were mainly conducted by directly loading the force on a single or a few teeth. However, in clinic, the orthodontic force is provided by loading orthodontic appliances, and there currently is no appropriate way to measure the force on the teeth provided by the loaded appliances. This study...
That recent years in China found a spate of 6 accidents of bridge collapse due to failure of suspenders arouses reflection of the industry. But the existing suspender models in researches are either too simple and rough or too complicated and inefficient. This paper therefore presents a support spring model based on a real bridge. The model is then applied to an actual bridge to analyze the impact...
The structural strength of the executive mechanism of excavator directly determines the whole performance, reliability and safety performance of the excavator. This paper aims to the executive mechanism, and establish the simulation model of excavator by using CAD and ANSYS. Then, the author simulates whole strength and single component strength of executive mechanism and analyze its strength change...
This paper processes simulate analysis of short-circuit test model of transformer, using finite element analysis software ANSYS. The winding and disk deformation is calculated in different elastic modulus value of strip; The model is calculated and analyzed in the load of short-circuit test, the maximum deformation 2.62 mm of disk obtained is mainly consistent with actual measured value 2.9 mm; Analysis...
Without any additional element, noncontinuous deformation of body can be simulated efficiently by interface element. The element stiffness matrix and interface stress are derived, which is based on the principle of virtual work. The steps given in the theoretical development were implemented in the computer program. A homogeneous cantilever beam and a composite structure were taken for examples to...
The research of load distribution is not only an important part of bearing theory but the basis of studying the other performance indicators of bearings as well. Based on the contact theory of Hertz, the relation of geometric deformation of slewing bearing under certain loads is analyzed, and an analytical formula of load distribution for the slewing bearing under the action of radial force, axial...
To meet the needs of rapidly changing roll. A factory cold rolling mill uses sliding type for Roll changing car to replacement of rolling mill roll. If the lack of stiffness in the work, Roll changing car often occurs deviation in working, Led to the replacement roll can not into the rolling mill, changing roll time can be extended. In order to get the displacement and stress distribution of frame,...
The vacuum-surcharge preloading method is widely used in improving soft soil ground. Currently, many methods can be used to calculate the settlement of the ground; however, those analyses need too many parameters and are too complicated for the engineers to use. ANSYS program is a practical program to calculate the settlement of improved soft ground by vacuum-surcharge preloading method. Using the...
How serious damages to the transmission lines and how safe transportation of electric energy are decided by the galloping extent of transmission lines. Random wind load due to the air flow, the temperature thermal stress as a result of the changed temperature, electromagnetic forces because of transmission lines current are important factors which lead overhead transmission lines to gallop. This article...
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