توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Influence of Residual Protective Oil on Physical and Mechanical Properties of Automotive Coating System
نویسنده(ها): ، ، ،
اطلاعات انتشار: دومین کنفرانس بین المللی رنگ و پوشش خودرویی، سال
تعداد صفحات: ۶
It is well known that protective oils are applied temporarily on metal substrates after steel manufacturing to prevent corrosion damages. In automotive manufacturing this layer is removed before coating application. Different methods are used to remove of this layer such as alkali solution spraying and solvent wash. Aforesaid methods can not remove this layer perfectly. As a result, always some residual protective oil remains on metal surface. In this work the effect of residual oil on different physical–mechanical properties (bending, cupping, hardness and impact) and corrosion resistance of different parts of automotive coating system containing electrodeposition (ED) layer and whole paint system (including phosphate, ED, primer and top coat) was investigated. It was seen that residual oil improved bending, cupping and impact properties of coating due to diffusion of the residual oil in coating layer. In the other hand corrosion resistance decreased because of adhesion failure.<\div>

۲STUDYING THE EFFECT OF WATER TABLE ELEVATION ON SEISMIC CHARACTERISTIC OF CRITICAL SLICE SURFACE ON EMBANKMENT DAMS (A CASE STUDY OF MASJED SOLEIMAN DAM)
نویسنده(ها): ، ،
اطلاعات انتشار: ششمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله، سال
تعداد صفحات: ۸
Evaluation of seismic behavior in different water table elevation is important because of continues using of water in dam reservoir. To achieve this goal, Masjed Soleiman dam for a case study has been selected. Finite Element model of Masjed Soleiman dam has been constructed. First, layer analyses have been carried out considering 12 layers in end of construction stage. Then, this analysis has been continued considering water table and weight of dam reservoir. 2 earthquake records have been applied horizontally to the bedrock for dynamic analysis. For study of water table elevation effect, 10 models have been used with different water table elevation. In this study, to perform stability analysis and calculate the factor of safety, critical sliding surface reported by the consultant engineers has been considered. Finally, for critical sliding surface, equal dynamic factor of safety derived from factor of safety in time domain and then has been compared static factor of safety. Result shows that, equal dynamic safety factor in downstream critical slice surface has been increased as increasing water table elevation. Even equal dynamic factor of safety in upstream critical slice surface has been decreased to 0.6 height of dam and for another has been increased.

۳A STUDY OF ACCELERATION DISTRIBUTION FOR DIFFERENT VIBRATION MODES IN EMBANKMENT DAMS
نویسنده(ها): ، ،
اطلاعات انتشار: اولین کنفرانس بین المللی ساخت و ساز شهری در مجاورت گسلهای فعال، سال
تعداد صفحات: ۹
evaluation of seismic behavior for different height of dam is important many embankment dams have been made in different height in our country that we have not general point of view about seismic behavior of them to achieve this goal masjed soleiman dam for a case study has been selected masjed soleiman zoned rock fill dam with 177 m height was constructed and impounded in south west of iran in 2001 finite element model of masjel soleiman dam has been constructed and the mohr–coulomb elastic –perfectly plastic constitutive model is taken into account to reflect the soil stress strain relation. first layer analyses have been carried out considering 12 layers in end of construction stage. then this analysis has been continued considering water table and weight of dam reservoir. 2 earthquake records have been applied horizontally to the bedrock for dynamic analysis. for study of mode of vibration and distribution of acceleration 10 models have been used with different height .<\div>
نمایش نتایج ۱ تا ۳ از میان ۳ نتیجه