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Based on the pyroelectricity, piezoelectricity, and thermoelasticity in nonlinear constitutive equations, we report a thermal piezoelectric semiconductor model under a mechanical load, a Schottky contact boundary condition, and a temperature gradient. To solve this nonlinear boundary value problem, we propose a shooting method. In comparison with the results obtained by COMSOL, the shooting method...
In this study, a combined experimental–numerical method is proposed for quantitatively characterizing the post-necking behavior of cylindrical metal specimens merely through its experimental force–displacement curve during quasi-static tension. This method is based on a rational phenomenological analysis of the correspondence between the necking levels and the experimental variables (force and displacement)...
Crashworthiness is the most significant variable during lightweight design of vehicle structures. However, crashworthiness studies using the single substructure-based method are limited due to the negligence of interactions among substructures. Thus, a whole structure-based study was conducted for the lightweight design of a body-side structure. In this study, a full finite element model was firstly...
To study the significance of measurements of plasma leptin and 5-hydroxytryptamine (5-HT) levels in the diagnosis of premature ejaculation (PE).We compared plasma leptin and 5-HT levels, intravaginal ejaculation latency time (IELT) and Chinese Index of Premature Ejaculation-5 (CIPE-5) scores between 59 patients with PE and 64 healthy control men without PE. We then analyzed the correlations of plasma...
To study the vibration of cab suspension, a commercial vehicle cab suspension model which contains cab, seat, suspension parts and vibration exciter was built with ADAMS. The vibration equations of the cab suspension were analyzed. The model was simulated under the continuous accelerated excitation and the accuracy was testified. Design of Experiment method was used to optimize the model. By matching...
This paper has investigated the cab styling of heavy-duty truck with a low air drag based on aerodynamics and aesthetics. It focuses on the relationship of air-deflector, trailer and drag through an example of air-deflector styling. The parameters, the angle of air-deflector and the height of trailer, are specifically discussed here. The gap between cab and trailer is fixed. A lower drag cab is presented...
This paper introduces a way to make automotive sketches ready for 2D to 3D reverse transformation. Three aspects of problems are discussed including the pre-processing of sketches outside computer, the processing of pre-processed sketches inside computer, and the extraction of features. Some of sketch processing algorithms are implemented using the MATLAB image processing toolbox. The work describe...
This paper has investigated the approaches of automotive 3-D styling based on the hand sketching with Wacom?? Cintiq 21UX digital screen. By the analysis of curve modeling tools for the current CAD systems used broadly in automotive industry, the easier, more intuitive and more convenient 3-D styling approaches are discussed. The stylist can change the curves with modified strokes during the sketching...
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