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RNE
Тунис
Добавлен 18 мар 2020
I am R. Nciri, Dr. Eng. and a technologist in Mechanical Engineering. I work as a technologist teacher in the Higher Institute of Technological Studies (Gafsa-Tunisia).
This is a technological educational channel that tries to cover a wide variety of mechanical disciplines in the field of Metallic construction.
Please accept my deep respects.
Thank you very much
انا ر. نصيري دكتور مهندس وتكنولوجي في الهندسة الميكانيكية. أعمل كمدرس تكنولوجي في المعهد العالي للدراسات التكنولوجية_قفصة - تونس
هذه قناة تعليمية تكنولوجية تحاول تغطية مجموعة متنوعة من التخصصات التكنولوجية و العلمية الميكانيكية في مجال الإنشاءات المعدنية.
أرجو أن تتقبلوا احترامي العميق.
شكرا جزيلا
بسم الله الرحمن الرحيم
"فأما الزبد فيذهب جفاء وأما ما ينفع الناس فيمكث في الأرض"
الرعد 17-القرآن الكريم
This is a technological educational channel that tries to cover a wide variety of mechanical disciplines in the field of Metallic construction.
Please accept my deep respects.
Thank you very much
انا ر. نصيري دكتور مهندس وتكنولوجي في الهندسة الميكانيكية. أعمل كمدرس تكنولوجي في المعهد العالي للدراسات التكنولوجية_قفصة - تونس
هذه قناة تعليمية تكنولوجية تحاول تغطية مجموعة متنوعة من التخصصات التكنولوجية و العلمية الميكانيكية في مجال الإنشاءات المعدنية.
أرجو أن تتقبلوا احترامي العميق.
شكرا جزيلا
بسم الله الرحمن الرحيم
"فأما الزبد فيذهب جفاء وأما ما ينفع الناس فيمكث في الأرض"
الرعد 17-القرآن الكريم
Metal Construction: Academic and Professional Prospects
This educational video technologically introduces the academic and professional prospects of Metal Construction studies associated to Mechanical Engineering as briefly and as clearly as possible.
00:00 Intro
00:25 Metal Construction | Academic prospects
02:17 Metal Construction | Professional prospects
03:45 End
00:00 Intro
00:25 Metal Construction | Academic prospects
02:17 Metal Construction | Professional prospects
03:45 End
Просмотров: 63
Видео
Thin shells_Membrane analysis
Просмотров 3958 месяцев назад
This educational video technologically introduces the membrane analysis applied to axisymmetric shells as simply and as clearly as possible. 00: Intro 00:15 Doubly curved shell model 02:27 Acting forces model 04:00 Equilibrium equations 04:50 Simplified equilibrium equations in axisymmetric condition 05:36 Membrane forces in axisymmetric condition 06:11 End
Thin shells_Normal strains and relationships with solicitations
Просмотров 2668 месяцев назад
This educational video technologically introduces the normal strains in thin shells as well as their relationships with sollicitations, as simply and as clearly as possible. 00:00 Intro 00:20 Normal strains model 03:11 Normal strains along x and y 04:28 Stress-strain relationships 05:09 Membrane force-strain relationships 06:34 Moment-strain relationships 07:13 End
Thin Shells_Solicitations
Просмотров 3588 месяцев назад
00:00 Intro 00:15 Infinitesimal shell element model 02:27 Membrane forces and radial shear forces 04:36 Bending and twisting moments 06:54 End
Shell_Technological introduction
Просмотров 6958 месяцев назад
This educational video technologically introduces the theory of plate as simply and as clearly as possible. 00:00 Intro 00:15 From plate to shell 00:51 Industrial applications of shells in metal construction 01:16 Parametric representation of a surface 05:11 Curvatures of the shell 10:07 Principal curvatures of the shell 12:31 Classification of shells based on Gaussian curvature 14:05 Classific...
Frame analysis_Tutorial 3
Просмотров 10210 месяцев назад
This is a second educational video among a series of tutorials showing how to analyze a loaded frame in terms of Normal Forces, Shear Forces and Bending Moment Diagrams. 00:00 Intro 00:22 Problem description 02:06 Determinacy checking 02:34 Reactions determination 04:48 NFD determination 07:15 SFD determination 11:28 BMD determination 15:35 End
Frame analysis | Tutorial 2
Просмотров 15110 месяцев назад
This is a second educational video among a series of tutorials showing how to analyze a loaded frame in terms of Normal Forces, Shear Forces and Bending Moment Diagrams. 00:00 Intro 00:24 Problem description 02:03 Determinacy checking 02:28 Reactions determination 05:45 NFD determination 08:51 SFD determination 11:54 BMD determination 16:01 End Frame analysis | Tutorial 1: ruclips.net/video/Rab...
Frame analysis | Tutorial 1
Просмотров 17211 месяцев назад
This is a first educational video among a series of tutorials showing how to analyze a loaded frame in terms of Normal Forces, Shear Forces and Bending Moment Diagrams. 00:00 Intro 00:21 Problem description 01:49 Determinacy checking 05:51 Reactions determination 08:17 NFD determination 10:33 SFD determination 12:24 BMD determination 14:02 End
Storage tank_Bottom plates and annular bottom plates sizing_API 650
Просмотров 4,7 тыс.Год назад
This educational video technologically introduces how to size the bottom plates and the annular bottom plates in storage tanks based on the API 650 standards as simply and as clearly as possible. 00:00 Intro 00:25 Bottom plates and annular bottom plates sizing: General rules 02:27 Annular bottom plates : Thickness 05:17 Annular bottom plates: Radial width 06:05 End
Storage tank_Shell thickness_1_Foot Method_API 650
Просмотров 1,7 тыс.Год назад
This educational video technologically introduces the shell thickness of a storage tank based on the API 650 using the 1-Foot-method as simply and as clearly as possible. 00:00 Intro 00:20 Shell thickness: General rules 01:20 Shell thickness: API 650 | 1-Foot Method 05:10 End
Storage tank_Technological introduction
Просмотров 271Год назад
This educational video technologically introduces the storage tanks in relation with the American Petroleum Institute (API) standards as simply and as clearly as possible. 00:00 Intro 00:18 Storage tanks: Principal Components 02:10 Storage tanks: Applications 02:53 Storage tanks: American Petroleum Institute Standards 04:23 End
Moment frame_Resistance behavior_Technological introduction
Просмотров 101Год назад
This educational video technologically introduces the resistance behavior of simple moment frame subjected to top and side uniformly distributed loads (UDL) as simply and as clearly as possible. 00:00 Intro 00:21 Rigid moment frame: Concept 01:51 Resistance behavior of rigid moment frame: Top UDL 06:30 Resistance behavior of rigid moment frame: Side UDL 11:19 End
Axial connections_Technological introduction
Просмотров 115Год назад
This educational video technologically introduces the axial connections as simply and as clearly as possible. 00:00 Intro 00:14 Axial force transfer through bracings: Concept 02:33 Axial connections: Gusset plate | Column-Beam-Brace 05:39 Axial connections: Gusset plate | Column-base plate-Brace 06:50 Axial connections: Other types 08:30 End
Moment connections_Technological introduction
Просмотров 157Год назад
This educational video technologically introduces the moment connections as simply and as clearly as possible. 00:00 Into 00:15 Bending moment and Shear force transfer: Concept 02:23 Bending moment transfer: Concept 03:24 Shear force transfer: Concept 04:02 Moment connection: Concept 04:26 Moment connections: Bolted flange | Bolted web plates 06:57 Moment connections: Bolted flange | Bolted web...
Shear connections_Technological introduction
Просмотров 180Год назад
This educational video technologically introduces the shear connections as simply and as clearly as possible. 00:00 Intro 00:13 Shear force transfer: Concept 02:42 Shear connections: Single plate connection 05:56 Shear connections: Angle connection 08:39 Shear connections: Pinned base plate connection 09:26 Shear connections: Other types 10:08 End
Steel connections_Technological introduction
Просмотров 123Год назад
Steel connections_Technological introduction
Shear Force, Normal forces and Bending moment_Technological introduction
Просмотров 273Год назад
Shear Force, Normal forces and Bending moment_Technological introduction
Snow action (Snow load)_Eurocode 1 |EN 1991-1-3
Просмотров 953Год назад
Snow action (Snow load)_Eurocode 1 |EN 1991-1-3
Wind action (Wind load)_Wind pressure_Eurocode 1 | EN1991-1-4
Просмотров 7 тыс.Год назад
Wind action (Wind load)_Wind pressure_Eurocode 1 | EN1991-1-4
Joint resistance verification_Fillet welded joint_Eurocode 3
Просмотров 150Год назад
Joint resistance verification_Fillet welded joint_Eurocode 3
Joint resistance verification_Bolted joint_Tension and combined {Shear+Tension} resistance
Просмотров 86Год назад
Joint resistance verification_Bolted joint_Tension and combined {Shear Tension} resistance
Joint resistance verification_Bolted joint_Bearing resistance_Eurocode 3
Просмотров 152Год назад
Joint resistance verification_Bolted joint_Bearing resistance_Eurocode 3
Joint resistance verification_Bolt joint_Shear resistance_Eurocode 3
Просмотров 118Год назад
Joint resistance verification_Bolt joint_Shear resistance_Eurocode 3
Steel structure resistance verification_Tension member_Tensile resistance_Eurocode 3
Просмотров 118Год назад
Steel structure resistance verification_Tension member_Tensile resistance_Eurocode 3
Steel structure resistance verification_Column_Buckling resistance_Eurocode 3
Просмотров 112Год назад
Steel structure resistance verification_Column_Buckling resistance_Eurocode 3
Steel structure resistance verification_Column_Cross-section resistance_ Eurocode 3
Просмотров 183Год назад
Steel structure resistance verification_Column_Cross-section resistance_ Eurocode 3
Steel structure resistance verification_Beam_Lateral Torsional Buckling resistance_Eurocode 3
Просмотров 189Год назад
Steel structure resistance verification_Beam_Lateral Torsional Buckling resistance_Eurocode 3
Steel structure resistance verification_Beam_Shear resistance_Eurocode 3
Просмотров 106Год назад
Steel structure resistance verification_Beam_Shear resistance_Eurocode 3
Steel structure resistance verification_Beam_Bending resistance_Eurocode 3
Просмотров 164Год назад
Steel structure resistance verification_Beam_Bending resistance_Eurocode 3
Steel structure resistance verification_Cross-section classification_Eurocode 3
Просмотров 281Год назад
Steel structure resistance verification_Cross-section classification_Eurocode 3
HI, SO MUCH INFORMATIVE BUT WANTED TO KNOW HOW CAN WE FIND OUT THE WELD FORCE VALUE OF DESIGN?
The forces applied on welds are determined based on a frame or beam analysis permititng to assess the shear force and the normal force at the considered weld. You can see this link: ruclips.net/video/RabpcKiCnBo/видео.html. Thanks for your interest.
how would you determine the T-min for a 2" nozzle sch160 on a ASME VIII, Division 1 vessel.
Thank you sir
Thank you ❤️
Thank you for this information Mister
Le prix d'un jeux de bouteille
Bravo, very comprehensive explanation
Merci Prof . Si possible de me contactez ??
Thank you
You're welcome
Camarades on ferme d'abord l'acetylene ensuite oxygène sinon attention retour de flame
Oui vous avez parfaitement raison. Merci.
❤merci prof
Good video. Well done!
Thanks a lot.
Sir, your videos are short, yet very informative, thanks, your comment section is interesting as well. I know about the factors affecting the CA, but it would be of great help if you provide us with another video focusing on CA. thanks again
Ok sir, as soon as possible. Thank you very much indeed for your interest.
You are sir, i am not sir :D I am just a humble junior tank engineer from Egypt and I send you and all Tunisia my warm regards < 3 @@HITS2009
is the courses height is equal ? how can i know the course dimensions
thank this was very clear and I I appreciate to aske could you explain how determine the CA
Thank you for your interest. The corrosion allowance is determined based on some factors, principally the construction material and the stored fluid properties, but also the operating conditions, the expected service life of the storage tank, the safety factors and the applicable standards, etc. Typical corrosion allowances can range from 1.5 mm to 6 mm for carbon steel storage tanks and sometimes as low as 1 mm or less for more resistant material to corrosion such as stainless steel. It is to not that corrosion allowance shoud be optimized under some economic consideratons and it should be, also, agreed by the customer. Please feel free to ask.
بلرك الله فيك من فصلك القرعة تاعوالغاز والاكسجين تخليهم قع ولا نص ولا غي شويا
تفتح صمامات الأسطوانة ربع دورة وهذا كافي.
How the direction of Mx or My matter ? Why is the direction as shown in presentation is like this if otherwise how the formula affected ?
THANKS MR. RACHED . I HAVE A Q UESTION WHICH IS , HOW TO KNOW THE HEIGHT AFTER THE LAST COURSE OF THE STEEL STORAGE TANK(AFTER TOP OF SHELL HEIGHT TO THE BEGINING OF ROOF)?
Thank you for your interest. First of all, it is to note clearly that the shell courses extend from the bottom of the tank to the top, where they meet the roof or cover of the tank. Thus, the height distance between the top of the "last" shell course and the beginnig of the roof is theoretically zero. But, please note that in the "last" shell course, the level of the stored fluid may not cover the whole height of the "last" shell course. The level of the stored fluid can be, for example, just one half or one third the height of the "last" shell course. It depends on the design liquid level of the stored fluid (imposed by an overfill slot governing the maximum capacity of the storage tank) with regard to the height of the storage tank between the bottom and the top of shell height where the roof begin. For further assimilating my answer, please see Figure 5-4-Storage Tank Volumes and Levels in API650.
Thanks Mr. Rashed , I appreciate your helping.
@@user-gz8zh2ew1j I am at your service. Do not hesitate to ask.
Est ce possible de savoir si vous connaissez la formule de calcule de la force nécéssaire pour plier du métal à l'aide d'une plieuse manuelle et non une presse plieuse. Merci bien Yasser
Bonjour. Merci pour votre interêt. Généralement sur une plieuse manuelle (plieuse universelle appelée aussi plieuse à sommier), la force de pliage est calculée en se basant sur la formule: F=L×E×R. Avec: F est la force de pliage en newtons (N); L est la longueur de la pièce à plier en mètres (m); E est l'épaisseur du matériau à plier en mètres (m); R est le facteur de résistance du matériau (voir les Tables de résistance des matériaux). Il est à noter ici que la formule ci-dessus est une simplification. En réalité, d'autres facteurs interviennent tels que le type d'outillage utilisé, forme de la pièce, ...etc. Pour aboutir à des résultats plus précis, il est judicieux de consulter les manuels fournits par le fabricant de la presse universelle considérée.
j'aime
شكرا لك أخي على نشرك للعلم
Thank you my friend! Very well explained. For those who have ears to hear.
Than you very much indeed for your interest.
why is the curvature of the plate in the y direction = -d^2w(x,y)/dx and not -d^2w(x,y)/dy . Was that an error?
Thanks a lot for your interest. No, it is not an error. In fact, the negative sign arises due to the sign convention used in structural mechanics. It's a convention to consider positive curvature as being concave upward. In other words, if a plate is concave upward, the curvature is positive, and if it is concave downward, the curvature is negative. The negative sign in the equation ensures that the sign of curvature aligns with the direction of the bending moment in the plate. It makes the relationship consistent with the conventions used in structural engineering analysis and design. When you see the equation rx=-w''(x), it means that positive curvature corresponds to a concave upward deflection of the plate.
Could you provide some example how to treat biharmonic equation ? I encountered following problem - It has model as funtion u(x,y) but in same time surface is embedded in 3D space. Thus it seems like '2,5D' formulation. Most of examples are in plane like disc, but what about deflection and squeeze in same time of shell surface which is not flat initially (boundary lines in 3D) ?
Thank you for your interest. You talk about a shell not a plate problem. The biharmonic equation is applicable to thin plates, the analysis of shell deflection typically involves more complex equations that account for the specific geometry and deformation characteristics of shells. The specific equations will depend on the assumptions and theories used for shell analysis, such as the Love-Kirchhoff theory for thin shells or other theories for thick shells. The basic equations for thin shells are derived from the equilibrium and compatibility conditions and are usually expressed as a system of coupled partial differential equations. The Love-Kirchhoff theory considers the first-order approximation of the shell's geometry and leads to equations involving the curvatures and membrane strains of the middle surface. The equations describe the balance of external and internal forces and moments, as well as the compatibility between deformations. I will work on an example about the shell elasticity in the next month.
@@HITS2009 Yes Shells indeed are interesting. That example would be great.
We appreciate your efforts Dr. Deep respect
Thank You Sir
Thanx sir
How to know size of leg?
The size of the leg of the weld bead is determined out of the ASME code by the formula: L=T/cos(45°) with L=Leg of the weld of bead. T=Throat of the weld bead. You can see this link: www.mtm-inc.com/welding-basics-the-fillet-weld.html. The throat of the weld bead is determined based on the correct sizing of weld bead. You can see these educational videos at these links: ruclips.net/video/0-Yg7SAvW6w/видео.html and ruclips.net/video/NOiR7OcNEks/видео.html. Thank you for your interest.
Keep up the good work 💪💪
dcen is more vicious
Sir i have exam so please make more videos on shell, you explain amazing
Thank you Sir for all your efforts
Thanks a lot. Very nice. If you have any questions do not hesitate to mention it in the comments.
Nice well
Kattupakkam
EN 1991: 1-4:2005 Clause 5.2 ,equation 5.1 € If the cross wind is zero what will happen? Along the tangent it is 90 degrees The external pressure is higher infact much higher than internal presure inside an aircraft ......
Merci beaucoup
Merci bien pour votre encouragement.
Great video! an example on a small portal frame building would be good!
Thank you very much for your interest. I'll post an educational video about your request as soon as possible.
Hello. First of all, I thank you for this video. You demonstrated the "(dzx1)" term in the moments' formullas. The only "dz" term is used instead of the "(dzx1)" term (the "1" term is missing) in the other some documents about this subject. Is it correct to use only the "dz" term. In addition, does this "1" term have a length dimension? If I assume that the "1" term has a length dimension in the moments' formullas of any plate, can I correctly calculate the dimensions of the bending and twisting moments of this plate?
@Ins.Yuk.Muh.MertUstun , Thank you for interest and Sorry for the late. First I will give a direct answer to your question and then I will explain some details to further clarify. Without entering in such details that you mention in your comment, you can directly and "simply" determine the moments using their expression in terms of the flexural rigidity of the plate denoted by D and the deflection denoted by w (which is a function of x and y coordinates where the moment should be calculated). Just pay attention to the double derivative of the deflection function and replace x and y by the numerical coordinates. Multiply by the flexural rigidity and you will finally obtain the numerical value of the moment. Now I'll explain you the "issue" of "dzx1". The expression of "dzx1" is just used to explain how the expression of the moment in terms of flexural rigidity and deflection is obtained. In fact the use of "dzx1" was to consider an infinitesimal surface dS=dzx1 on which the stress σ is applied. The infinitesimality of the considered surface is taken along the thickness direction: z-direction (which explain the dz term) while along the other direction the length of the considered surface is taken as the unity 1 (the unity concept escape the dimensionality). The infinitesimality of the dimenion is taken along the z-direction (dz) in order to properly express the considered moment as the integral along the thickness (between -h/2 to h/2) of the applied force multiplied by the distance from the considered infinitesimal surface to the mid-surface of the plate. The applied force on the considered surface is taken as: F=σ x dS=σ x (dz x 1). The distance from the considered infinitesimal surface to the mid-surface of the plate is taken as z. This is mathemtically written in the integral expression. Please feel free to ask. Once again, thanks a lot for your interest.
@@HITS2009 Thank you for your interest and explanations.. It's not important that you answer my questions quickly for me. I could understand all your explations. I could understand that an integral calculation is made to go from a small part to a whole part. But I want to ask you something that if the "1" term has no dimension, how can it be any length? Physically, if anything is a length, doesn't it have to have a dimension? Regards,
@@Ins.Yuk.Muh.MertUstun When I say "the unity concept escape the dimensionality" I mean that the length of the considered infinitesimal element is equal to ANY one unit of measurement you choose whatever one meter, one foot, one centimeter, or any other unit of measurement you choose. The term "unity" in this case is used to emphasize that you are using a single unit of measurement without specifying the actual unit itself. it's a way of expressing that the length of the considered infinitesimal surface element has a length of exactly one unit of a particular measurement system. "Unity" simply refers to a quantity of 1, and it is often associated with some specific unit of measurement, depending on the context. If you need further explanations, please feel free to ask. Please accept my deep respect.
@@HITS2009 Thank you for all your explanations. It is not important to answer my questions late. Sometimes everybody is so busy. I am late to thank you.I feel so sorry. I understood that any infinitesimal surface has no any unit of its dimensions from your explanations. We may think the infinitesimal surface for the math calculations in the engineering problems. Thank your interest ve explanations. Have a nice day.
J'aime
Please make vedio series on API 653 / API 650 .
Ok, I'll make some tutorials about "Tank Inspection, Repair, Alteration, and Reconstruction" as soon as possible. Thank your for your interest.
@RNE2009 please make a detailed video series regarding API 653 covering all the clauses of standard. Your way of teaching is superb.
@@chandershekhar2192 Ok, it will be available as soon as possible. Thank you very much for your positive attitude.
This is an elaborate explanation..please sir, Can you please make a video using a simple building as an example
Thank you very much for your interest sir. As soon as possible, I will elaborate an educational video as a tutorial using a simple building subjected to wind action. Deep respect sir.
Why 0.3 m. I know that it is called one foot method but can you give me the reference that tells me why 0,3m.
Thank you for your interest. the direct answer to your question is: The one-foot method is elaborated ("designed") to calculate the required thicknesses at specified design points located at 0.3 m (1 ft) height above the bottom of each shell course. You can check this information in API 650-5.6.3.1. Also, you can see a detailed explanation about the reason behind why 0.3 m in the reference : doi.org/10.1016/j.engstruct.2015.07.050 which explains that: "...The required shell plate thickness for each shell course is calculated using the circumferential stress at a point 0.3 m (1-ft) above the lower horizontal weld seam of the shell course due to hydrostatic pressure of the stored liquid. The reasoning behind this assumption is that the tank bottom plates provide restraint to reduce circumferential stress due to hydrostatic pressure at the bottom 0.3 m (1-ft) of the lowest shell course...". This is "in contrast" with the Variable-design-point method which permits to calculate shell thicknesses at design points that result in the calculated stresses being relatively close to the actual circumferential shell stresses. This will provide a reduction in shell-course thicknesses and total material weight( see API 650 5.6.4.1 and 5.6.4). If you have any other questions, please do not hesitate to ask.
please note that reffering to eurocode Z values you posted are not for medi region
Thank you for your interest. Please note that referring to Eurocode 1-Part 1.3--Figure C.6, The Z values (Zone number values) for Mediterranean region are exactly similar to the showed values in the educational video. If you mean by "z values" the ones in the column at the right to the Zone N° column, please note that these values are rather the associated values of the characteristic snow load on the ground Sk (in kN/m^2) at the sea level A=0. Also, the characteristic snow load on the ground Sk is exactly the one associated to the Mediterranean region referring to Eurocode1-Part 1.3-Table C.1. Hence, the content of the educational video is correct. If you have any other remarks, please do not hesitate to mention it.
Bonjour...
D'abord je vous remercie pour l'effort. Vous apporter une véritable valeur ajouter. Dans le domaine de construction métallique en emploi souvent l'oxycoupeur. Les connaissance pratiques et théoriques des ouvriers sont très limitées. Est ce que vous pouvez mettre en ligne, une vidéo qui montre comment decouper la charpente. Comment débiter la charpente métallique pour fabriquer des jarrets et des faîtage. Je vous remercie .
@@djamelsaid2493 Merci infiniment pour votre intrêt. Juste je suis très occupé par les activités de la fin d'année universitaire. Dès que je trouve le temps, je vais faire cette video Nchallah. Encore une fois merci.
La position de la fibre neutre devrait plutôt être e*K. Je ne comprends pas pourquoi tu fais e/2*K.
Prière d'examiner la norme: Deutsches Institut für Normung, DIN 6935 : 2011. Faites attention à la manière avec laquelle on calcule k dans cette norme. Merci pour votre interêt.
جزاك الله خيرا 🌺
جزاك الله خيرا
رحم الله والديك. شكرا على التشجيع.
استاذ ربي يباركلك فرزقك نتا بعد الله عز و جل سبب من اسباب نجاحي شكرا كبير ليك
@cherifoxoahmed بارك الله فيك و اعطاك الخير الكثير. الفضل لله و لاجتهادك. ما انا الا عبد من عباد الله يبتغي نفع الناس بما انعم الله عليه. شكرا على التشجيع.