List of Articles Stress distribution

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  1 - Investigation on Stress Distribution of Functionally Graded Nanocomposite Cylinders Reinforced by Carbon Nanotubes in Thermal Environment
  Mohammad morad Sheikhi Hamidreza Shamsolhoseinian Rasool Moradi dastjerdi
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  2 - The Experimental Study of the Influence of Function and Arrangement of Geogrids and Uniform Stress Distribution in the Tensile Area of the Concrete structures
  Ashkan khodaBandeLou aliasgar akbari bargoshadi
  Concrete is one of the main materials used in the construction industry and there are disadvantages to the conventional method of using steel, which reduces the breakage and concrete failure. Today, the spread of the science of applying polymeric materials to overcome t More

  Concrete is one of the main materials used in the construction industry and there are disadvantages to the conventional method of using steel, which reduces the breakage and concrete failure. Today, the spread of the science of applying polymeric materials to overcome these disadvantages has quickly taken its place in concrete ingredients. These materials can produce stronger concrete with greater flexibility and a smoother surface and can increase concrete resistance to erosion, impact and corrosion. In this research, using Geogrid, which is a family of geosynthetics, the tensile strength of concrete increased by 15%. Because it is used as a solid with very low risk, the geogrid is placed at different distances from the neutral warp. Based on the results of the experiments and according to the diagrams obtained from the geogrid experiments, if utilized as a semi-solid in the tensile region, the geogrids will result in the equal distribution of stresses and will have a better effect on increasing tensile strength. Of course, using a combination of steel and geogrid in the tensile region and according to the geogrid characteristics, it is easier to achieve a soft failure (tensile failure), which is the best type of failure for concrete structures. Manuscript profile
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  3 - Study on Cyclic Behavior of Stiffened Steel Shear Walls with Semi-rigid Joints to Steel Frame
  sina shirjang Ahmad maleki
  With increasing research on the operation of the shear walls of the steel walls and increasing the reliability of their operation, the use of these walls has been noticeably expanded, especially in the United States and Japan. Given the relatively comprehensive understa More

  With increasing research on the operation of the shear walls of the steel walls and increasing the reliability of their operation, the use of these walls has been noticeably expanded, especially in the United States and Japan. Given the relatively comprehensive understanding of the behavior of these walls, design rules have now begun to provide design rules for these walls. The basis of the performance of these structures is based on the operation of the diagonal tensile field after the buckling of the steel plate. Simple implementation is based on the technical advantages of the system without the need to acquire new skills, reduce the dimensions of the foundation, increase the perceptibility of the lateral structure of the structure, reduce the dead load, and, in the meantime, the economy of this system in counteracting the steel frame framing system is considered as the main advantages of this system. Gets The steel shear wall is a new side-impact resistant system that has better performance than other side-impact resistant systems. Considering the importance of using such structures, there is a need for study in this field. In this study, prior to examining the performance of joint wall joints, to verify the numerical results, we verified the laboratory sample and after evaluating and assuring the results of the modeling, 12 steel wall panels with Abaqus software were used. In these samples, parameters such as wall thickness, geometric characteristics of beams and columns, and the degree of opening of the corners of the sheet are investigated. The results of this study showed that with increasing the cross-section of the columns, the stress distribution was uniformly distributed on the surface of the sheet and the entire surface of the sheet buckling to the outside of the sheet, while in the case of an increase in the cross section of the buckler, It is visible on the sheets. However, in the event of an increase in the thickness of the wall plate, the amount of non-elastic strain created is less and is approximately limited to the lower parts of the first sheet. With a 20% increase in wall thickness, the bearing capacity and hardness of the samples increased by an average of 18%, and by increasing the opening rate, from 5 to 15% of the bearing capacity decreased by about 20%, and the amount of strain of plastic in the form of a diameter in the sheets It is visible at the site of the sheet attachment to the perimeter bore in the portions of the columns. Manuscript profile
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  4 - Investigation of the Performance of Sandwich Floor Under the Explosive Load by Finite Element Method
  Naser Ahadi mohammadali lotfollahi yaghin
  Nowadays, with the spread of explosive attacks on buildings in the world, a detailed study of the behavior of structures under the influence of explosive loads is a necessity. The explosion is a reaction in which the rate of burning material is carried out at a much hig More

  Nowadays, with the spread of explosive attacks on buildings in the world, a detailed study of the behavior of structures under the influence of explosive loads is a necessity. The explosion is a reaction in which the rate of burning material is carried out at a much higher rate than the sound speed, resulting in a very high temperature and pressure gradient generated and the shock wave is immediately generated and released at a very high speed. In this study, considering the importance of the subject, we examined the behavior of the panel sandwich ceilings under the canwep loads using Abqus 2016 software. In order to validate the results of the numerical examples, we first verified the results of a sample of the reference article and, after correctness of the results, we applied numerical modeling to six models and extracted the results in Excel software. In this research, numerical examples include two groups of roof panel sandwich panels that differ in interior hardening intervals. Both groups under the load of 1, 2 and 3 kg of TNT were located at a distance of 20 cm from the center of the roof and examined the impact of the explosive charge on the distribution of stress and displacements in the samples. As expected, according to the samples, the explosion of the explosive and the increase in distance from the surface of the panel reduced the amount of displacement and stresses on the panel, as well as the distance of the explosive from the surface of the panel and the increase in the amount of explosive material, displacement and The tension on the panel has also increased. Manuscript profile
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  5 - بررسی تغییرات ضریب شدت تنش با فاصله ترک از لبه بار گذاری در بارگذاری متمرکز در ترک لبه ای
  فرزاد فریبا سید مهران زحلی
  تعیین توزیع تنش در نوک ترک و تعیین ضریب شدت تنش در آن، یکی از مباحث مطرحه و مهم در مکانیک شکست می باشد. مقدار ضریب شدت تنش برای حالت های محتلف بار گذاری و هندسه های مختلف نمونه و ترک در استاندارد ها ارائه شده است. اما در تمامی این حالت ها ترک در وسط ورق واقع شده است. هن More

  تعیین توزیع تنش در نوک ترک و تعیین ضریب شدت تنش در آن، یکی از مباحث مطرحه و مهم در مکانیک شکست می باشد. مقدار ضریب شدت تنش برای حالت های محتلف بار گذاری و هندسه های مختلف نمونه و ترک در استاندارد ها ارائه شده است. اما در تمامی این حالت ها ترک در وسط ورق واقع شده است. هنگامی که توزیع تنش یکنواخت در لبه های ورق وجود دارد، موقعیت ترک چندان تاثیری در مقدار ضریب شدت تنش نخواهد داشت، اما در بار گذاری های متمرکز با دور شدن از محل اعمال بار توزیع تنش تغییر نموده و مقدار ضریب شدت تنش نیز تغییر می کند. بنابراین تغییرات ضریب شدت تنش در ترک های واقع شده در نقاط غیر مرکزی یکی از مواردی است که باید مورد بررسی قرار گیرد. در این تحقیق، رابطه ای برای تعیین ضریب شدت تنش در ترک لبه ای در بار گزاری متمرکز بر حسب فاصله از لبه بار گذاری ارائه شده است. این رابطه با استفاده از شبیه سازی از طریق نرم افزار آباکوس به دست آمده و سپس با استفاده از روابط تحلیلی موجود، و با تعیین توزیع تنش در ورق مورد بررسی و استفاده از روابط موجود در نظریه شکست خطی و در محدوده الاستیک نیز تغییرات ضریب شدت تنش استخراج شده است. این دو رابطه با هم مقایسه شده و در نهایت یک رابطه برای این منظور ارائه شده است. Manuscript profile
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  6 - Presentation and Analysis of Methods for Increasing Glue Joint Strength in the Same Length Joint
  A.H. Ehsani Ehsani M. Shirzadian Gilan A. Ghafori Sayad A. Shokrgozar Navi
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