مکانیک

    1-  مفهوم تنش

           1-1-  تنش برشی

                      تنش

                       برش یکطرفه

                       برش دوطرفه

                      Shear Key - Lever

                      Shear Key - Gear 

                       Punching Shear - Slot  

                      Pin-Supported Rigid Bar Example

                      Pipe Flange Example

           1-2- تنش یک مقطع مورب تحت اثر بارگذاری محوری

                  نمایش

    2-  تنش و کرنش-بارگذاری محوری

           2-1- تغییر شکل اعضا تحت اثر نیروی محوری

                          مثال1

                          مثال2

                          مثال3

                          مثال4

                          کوئیز

           2-2-  Statistically Indeterminate Problems   (مسائل نامعین تعادلی!)

                             مثال1

                       مثال2

                       مثال3

                       مثال4

                       مثال5

                       مثال6

                       مثال7

           2-3- Problems Invovling Temperature Changes

                           مثال1

           2-4- Multiaxial Loading; Generalized Hooke's Law   (قانون هوک)

                          Biaxial Stress Derivation

           2-5-  دانسته های خود از مکانیک را تست  کنید.

                       کوئیز فصلهای 1 و 2

    3- پیچش

           Coming soon…

    4- خمش

         Coming soon…

بارگذاری، برش و گشتاور

    1- تنش برشی در تیرها

           1-1- Theory of Fundamentals

                      Derivation of Transverse Shear Stress 

                       Derivation

                       استفاده از فرمول تنش برشی

                       استفاده از تنش برشی (Special Attention to Q)

                       Thin-Walled Member

           1-2- Shear Flow (q, horizontal shear per unit length)  

                  Explanation followed by Checkpoint Q's (with audio)

 مثال     (مثال با صدا)

    2- Stress Transformations

          2-1 visual introduction

                          The Amazing Stress Camera                        

           2-2- background information

                       Plane stress transformations - terminology (CC)

                       Plane stress transformations - derivation

      2-3- additional help with angles and signs 

                       Top-Drop-Sweep the Clock

                       Stress transformations: sign convention quiz

       2-3- مسائل نمونه

                       Using the stress transformation equations

                       مثال1

                       مثال2

    3- دایره موهر

     3-1- on-line materials

                       Coach Mohr's circle of stress

       (background info, and interactive tutorial)

                       Mohr's circle for plane stress - how to draw the circle

   (will draw any Mohr's Circle for you)

                       Mohr's circle for plane stress: derivation

                       Mohr's circle for plane stress: constructing the circle

     (step-by-step instructions - good starting point)

                       Mohr's circle for plane stress: finding principal stresses from the circle

                       Mohr's circle for plane stress: finding maximum shear stress from the circle

     3-2- Excellent Self Assessment

                     بازی دایره موهر: شناخت 

                       بازی دایره موهر: شرح

    4- Pressure Vessels

                       Cylindrical Pressure Vessels

 Spherical Pressure Vessels                 

    5- بارگذاری های ترکیبی

        5-1- مسائل نمونه

                     Principal Stresses in T-beam

                       Combined Loading - steel beam

                       Combined axial and bending - post and beam

     (Includes Transverse Shear Loading, Bending Moments, Axial Loading)

                      Precast concrete beam and corbel

                       Combined torsion and axial

        (Includes finding principal and maximum shear stresses using Mohr's circle)

     5-2- Good Practice Calculating Moments in 3D

                      Up periscope

     5-3- Easy Self Assessment (Should be...)

                       The tree - combined axial and bending   

                          C-clamp normal stresses (try one)  

     5-4- More Difficult Self Assessment (Step-by-Step)

                       Beams bending about two axes

    6- Beam Deflections

Coming soon…

    7- ستون                        

Coming soon…