كتاب Statics and Mechanics of Materials - صفحة 2
منتدى هندسة الإنتاج والتصميم الميكانيكى
بسم الله الرحمن الرحيم

أهلا وسهلاً بك زائرنا الكريم
نتمنى أن تقضوا معنا أفضل الأوقات
وتسعدونا بالأراء والمساهمات
إذا كنت أحد أعضائنا يرجى تسجيل الدخول
أو وإذا كانت هذة زيارتك الأولى للمنتدى فنتشرف بإنضمامك لأسرتنا
وهذا شرح لطريقة التسجيل فى المنتدى بالفيديو :
https://www.youtube.com/watch?v=aw8GR3QlY6M
وشرح لطريقة التنزيل من المنتدى بالفيديو:
https://www.youtube.com/watch?v=Lf2hNxCN1cw
https://www.youtube.com/watch?v=PRIGVoN7CPY
إذا واجهتك مشاكل فى التسجيل أو تفعيل حسابك
وإذا نسيت بيانات الدخول للمنتدى
يرجى مراسلتنا على البريد الإلكترونى التالى :

DEABS2010@YAHOO.COM


 
الرئيسيةالبوابةاليوميةس .و .جبحـثالتسجيلدخولحملة فيد واستفيدجروب المنتدى
شاطر | .
 

 كتاب Statics and Mechanics of Materials

استعرض الموضوع السابق استعرض الموضوع التالي اذهب الى الأسفل 
انتقل الى الصفحة : الصفحة السابقة  1, 2
كاتب الموضوعرسالة
Admin
مدير المنتدى
مدير المنتدى


عدد المساهمات : 14273
التقييم : 22960
تاريخ التسجيل : 01/07/2009
العمر : 28
الدولة : مصر
العمل : مدير منتدى هندسة الإنتاج والتصميم الميكانيكى
الجامعة : المنوفية

مُساهمةموضوع: كتاب Statics and Mechanics of Materials   السبت 07 يوليو 2012, 11:30 pm

تذكير بمساهمة فاتح الموضوع :

أخوانى فى الله
أحضرت لكم كتاب

Statics and Mechanics of Materials

ويتناول الموضوعات الأتية :

1 Introduction 1
1.1 What is Mechanics? 2
1.2 Fundamental Concepts and Principles—
Mechanics of Rigid Bodies 2
1.3 Fundamental Concepts—Mechanics of
Deformable Bodies 5
1.4 Systems of Units 5
1.5 Conversion from One System of Units to Another 10
1.6 Method of Problem Solution 11
1.7 Numerical Accuracy 13
2 Statics of Particles 14
2.1 Introduction 16
Forces in a Plane 16
2.2 Force on a Particle. Resultant of Two Forces 16
2.3 Vectors 17
2.4 Addition of Vectors 18
2.5 Resultant of Several Concurrent Forces 20
2.6 Resolution of a Force into Components 21
2.7 Rectangular Components of a Force. Unit Vectors 26
2.8 Addition of Forces by Summing x and y Components 29
2.9 Equilibrium of a Particle 33
2.10 Newton’s First Law of Motion 34
2.11 Problems Involving the Equilibrium of a Particle.
Free-Body Diagrams 34
Forces in Space 42
2.12 Rectangular Components of a Force in Space 42
2.13 Force Defined by its Magnitude and
Two Points on Its Line of Action 45
2.14 Addition of Concurrent Forces in Space 46
2.15 Equilibrium of a Particle in Space 52
Review and Summary 58
Review Problems 6
3 Rigid Bodies: Equivalent
Systems of Forces 64
3.1 Introduction 66
3.2 External and Internal Forces 66
3.3 Principle of Transmissibility. Equivalent Forces 67
3.4 Vector Product of Two Vectors 69
3.5 Vector Products Expressed in Terms of
Rectangular Components 71
3.6 Moment of a Force about a Point 73
3.7 Varignon’s Theorem 75
3.8 Rectangular Components of the Moment of a Force 75
3.9 Scalar Product of Two Vectors 84
3.10 Mixed Triple Product of Three Vectors 86
3.11 Moment of a Force about a Given Axis 87
3.12 Moment of a Couple 94
3.13 Equivalent Couples 95
3.14 Addition of Couples 97
3.15 Couples Can be Represented by Vectors 97
3.16 Resolution of a Given Force into a Force at O
and a Couple 98
3.17 Reduction of a System of Forces to One Force and
One Couple 108
3.18 Equivalent Systems of Forces 109
3.19 Equipollent Systems of Vectors 110
3.20 Further Reduction of a System of Forces 110
Review and Summary 122
Review Problems 127
4 Equilibrium of Rigid Bodies 130
4.1 Introduction 132
4.2 Free-Body Diagram 133
Equilibrium in Two Dimensions 134
4.3 Reactions at Supports and Connections for a
Two-Dimensional Structure 134
4.4 Equilibrium of a Rigid Body in Two Dimensions 136
4.5 Statically Indeterminate Reactions. Partial Constraints 138
4.6 Equilibrium of a Two-Force Body 149
4.7 Equilibrium of a Three-Force Body 150
Equilibrium in Three Dimensions 155
4.8 Equilibrium of a Rigid Body in Three Dimensions 155
4.9 Reactions at Supports and Connections
for a Three-Dimensional Structure
Friction 167
4.10 Friction Forces 167
4.11 The Laws of Dry Friction. Coefficients of Friction 167
4.12 Angles of Friction 170
4.13 Problems Involving Dry Friction 171
Review and Summary 179
Review Problems 183
5 Distributed Forces: Centroids
and Centers of Gravity 186
5.1 Introduction 188
Areas and Lines 188
5.2 Center of Gravity of a Two-Dimensional Body 188
5.3 Centroids of Areas and Lines 190
5.4 First Moments of Areas and Lines 191
5.5 Composite Plates and Wires 194
5.6 Determination of Centroids by Integration 201
5.7 Theorems of Pappus-Guldinus 203
*5.8 Distributed Loads on Beams 210
Volumes 213
*5.9 Center of Gravity of a Three-Dimensional Body.
Centroid of a Volume 213
*5.10 Composite Bodies 214
Review and Summary 221
Review Problems 224
6 Analysis of Structures 226
6.1 Introduction 228
Trusses 229
6.2 Definition of a Truss 229
6.3 Simple Trusses 231
6.4 Analysis of Trusses by the Method of Joints 232
6.5 Joints under Special Loading Conditions 234
6.6 Analysis of Trusses by the Method of Sections 240
*6.7 Trusses Made of Several Simple Trusses 241
Frames and Machines 248
6.8 Structures Containing Multiforce Members 248
6.9 Analysis of a Frame 248
6.10 Frames Which Cease to Be Rigid when
Detached from Their Supports 249
6.11 Machines 260
Review and Summary 271
Review Problems 274
7 Distributed Forces: Moments of
Inertia of Areas 276
7.1 Introduction 278
7.2 Second Moment, or Moment of Inertia, of an Area 278
7.3 Determination of the Moment of Inertia
of an Area by Integration 279
7.4 Polar Moment of Inertia 281
7.5 Radius of Gyration of an Area 282
7.6 Parallel-Axis Theorem 287
7.7 Moments of Inertia of Composite Areas 288
Review and Summary 295
Review Problems 297
8 Concepts of Stress 300
8.1 Introduction 302
8.2 Stresses in the Members of a Structure 302
8.3 Axial Loading. Normal Stress 303
8.4 Shearing Stress 305
8.5 Bearing Stress in Connections 306
8.6 Application to the Analysis of a Simple Structure 307
8.7 Design 312
8.8 Stress on an Oblique Plane under Axial Loading 320
8.9 Stress under General Loading Conditions.
Components of Stress 321
8.10 Design Considerations 324
Review and Summary 335
Review Problems 338
9 Stress and Strain—Axial
Loading 342
9.1 Introduction 344
9.2 Normal Strain under Axial Loading 345
9.3 Stress-Strain Diagram 346
9.4 Hooke’s Law. Modulus of Elasticity 351
*9.5 Elastic versus Plastic Behavior of a Material 352
*9.6 Repeated Loadings. Fatigue 354
9.7 Deformations of Members under Axial Loading 355
9.8 Statically Indeterminate Problems 364
9.9 Problems Involving Temperature Changes
9.10 Poisson’s Ratio 379
9.11 Multiaxial Loading: Generalized Hooke’s Law 380
9.12 Shearing Strain 382
*9.13 Further Discussion of Deformations under
Axial Loading. Relation Among E, n, and G 385
9.14 Stress and Strain Distribution under
Axial Loading. Saint-Venant’s Principle 391
9.15 Stress Concentrations 393
Review and Summary 397
Review Problems 402
10 Torsion 406
10.1 Introduction 408
10.2 Preliminary Discussion of the Stresses in a Shaft 409
10.3 Deformations in a Circular Shaft 411
10.4 Stresses 413
10.5 Angle of Twist 423
10.6 Statically Indeterminate Shafts 427
Review and Summary 437
Review Problems 439
11 Pure Bending 442
11.1 Introduction 444
11.2 Symmetric Member in Pure Bending 446
11.3 Deformations in a Symmetric Member in Pure Bending 448
11.4 Stresses and Deformations 451
11.5 Bending of Materials Made of Several Materials 461
11.6 Eccentric Axial Loading in a Plane of Symmetry 471
*11.7 Unsymmetric Bending 479
*11.8 General Case of Eccentric Axial Loading 485
Review and Summary 493
Review Problems 496
12 Analysis and Design of
Beams for Bending 500
12.1 Introduction 502
12.2 Shear and Bending-Moment Diagrams 505
12.3 Relations among Load, Shear, and Bending Moment 514
12.4 Design of Prismatic Beams for Bending 524
Review and Summary 531
Review Problems 533
13 Shearing Stresses in Beams and
Thin-Walled Members 536
13.1 Introduction 538
13.2 Shear on the Horizontal Face of a Beam Element 540
13.3 Determination of the Shearing Stresses in a Beam 542
13.4 Shearing Stresses txy in Common Types of Beams 543
13.5 Longitudinal Shear on a Beam Element of Arbitrary
Shape 552
13.6 Shearing Stresses in Thin-Walled Members 554
Review and Summary 564
Review Problems 566
14 Transformations of Stress 570
14.1 Introduction 572
14.2 Transformation of Plane Stress 574
14.3 Principal Stresses. Maximum Shearing Stresses 575
14.4 Mohr’s Circle for Plane Stress 582
14.5 Stresses in Thin-Walled Pressure Vessels 592
Review and Summary 599
Review Problems 602
15 Deflection of Beams 604
15.1 Introduction 606
15.2 Deformation of a Beam under Transverse Loading 607
15.3 Equation of the Elastic Curve 608
15.4 Direct Determination of the Elastic
Curve from the Load Distribution 614
15.5 Statically Indeterminate Beams 616
15.6 Method of Superposition 624
15.7 Application of Superposition to Statically
Indeterminate Beams 626
Review and Summary 634
Review Problems 637
16 Columns 640
16.1 Introduction 642
16.2 Stability of Structures 642
16.3 Euler’s Formula for Pin-Ended Columns 644
16.4 Extension of Euler’s Formula to Columns
with Other End Conditions 648
*16.5 Design of Columns under a Concentric Load 658
Review and Summary 670
Review Problems 672
Appendices 675
A Typical Properties of Selected Materials
Used in Engineering 676
B Properties of Rolled-Steel Shapes 680
C Beam Deflections and Slopes 692
Photo Credits 693
Index 695
Answers to Problems 705

أتمنى أن تستفيدوا منه وأن ينال إعجابكم



الرجوع الى أعلى الصفحة اذهب الى الأسفل

كاتب الموضوعرسالة
Admin
مدير المنتدى
مدير المنتدى


عدد المساهمات : 14273
تاريخ التسجيل : 01/07/2009

مُساهمةموضوع: كتاب Statics and Mechanics of Materials   السبت 07 يوليو 2012, 11:30 pm

أخوانى فى الله
أحضرت لكم كتاب

Statics and Mechanics of Materials

ويتناول الموضوعات الأتية :

1 Introduction 1
1.1 What is Mechanics? 2
1.2 Fundamental Concepts and Principles—
Mechanics of Rigid Bodies 2
1.3 Fundamental Concepts—Mechanics of
Deformable Bodies 5
1.4 Systems of Units 5
1.5 Conversion from One System of Units to Another 10
1.6 Method of Problem Solution 11
1.7 Numerical Accuracy 13
2 Statics of Particles 14
2.1 Introduction 16
Forces in a Plane 16
2.2 Force on a Particle. Resultant of Two Forces 16
2.3 Vectors 17
2.4 Addition of Vectors 18
2.5 Resultant of Several Concurrent Forces 20
2.6 Resolution of a Force into Components 21
2.7 Rectangular Components of a Force. Unit Vectors 26
2.8 Addition of Forces by Summing x and y Components 29
2.9 Equilibrium of a Particle 33
2.10 Newton’s First Law of Motion 34
2.11 Problems Involving the Equilibrium of a Particle.
Free-Body Diagrams 34
Forces in Space 42
2.12 Rectangular Components of a Force in Space 42
2.13 Force Defined by its Magnitude and
Two Points on Its Line of Action 45
2.14 Addition of Concurrent Forces in Space 46
2.15 Equilibrium of a Particle in Space 52
Review and Summary 58
Review Problems 6
3 Rigid Bodies: Equivalent
Systems of Forces 64
3.1 Introduction 66
3.2 External and Internal Forces 66
3.3 Principle of Transmissibility. Equivalent Forces 67
3.4 Vector Product of Two Vectors 69
3.5 Vector Products Expressed in Terms of
Rectangular Components 71
3.6 Moment of a Force about a Point 73
3.7 Varignon’s Theorem 75
3.8 Rectangular Components of the Moment of a Force 75
3.9 Scalar Product of Two Vectors 84
3.10 Mixed Triple Product of Three Vectors 86
3.11 Moment of a Force about a Given Axis 87
3.12 Moment of a Couple 94
3.13 Equivalent Couples 95
3.14 Addition of Couples 97
3.15 Couples Can be Represented by Vectors 97
3.16 Resolution of a Given Force into a Force at O
and a Couple 98
3.17 Reduction of a System of Forces to One Force and
One Couple 108
3.18 Equivalent Systems of Forces 109
3.19 Equipollent Systems of Vectors 110
3.20 Further Reduction of a System of Forces 110
Review and Summary 122
Review Problems 127
4 Equilibrium of Rigid Bodies 130
4.1 Introduction 132
4.2 Free-Body Diagram 133
Equilibrium in Two Dimensions 134
4.3 Reactions at Supports and Connections for a
Two-Dimensional Structure 134
4.4 Equilibrium of a Rigid Body in Two Dimensions 136
4.5 Statically Indeterminate Reactions. Partial Constraints 138
4.6 Equilibrium of a Two-Force Body 149
4.7 Equilibrium of a Three-Force Body 150
Equilibrium in Three Dimensions 155
4.8 Equilibrium of a Rigid Body in Three Dimensions 155
4.9 Reactions at Supports and Connections
for a Three-Dimensional Structure
Friction 167
4.10 Friction Forces 167
4.11 The Laws of Dry Friction. Coefficients of Friction 167
4.12 Angles of Friction 170
4.13 Problems Involving Dry Friction 171
Review and Summary 179
Review Problems 183
5 Distributed Forces: Centroids
and Centers of Gravity 186
5.1 Introduction 188
Areas and Lines 188
5.2 Center of Gravity of a Two-Dimensional Body 188
5.3 Centroids of Areas and Lines 190
5.4 First Moments of Areas and Lines 191
5.5 Composite Plates and Wires 194
5.6 Determination of Centroids by Integration 201
5.7 Theorems of Pappus-Guldinus 203
*5.8 Distributed Loads on Beams 210
Volumes 213
*5.9 Center of Gravity of a Three-Dimensional Body.
Centroid of a Volume 213
*5.10 Composite Bodies 214
Review and Summary 221
Review Problems 224
6 Analysis of Structures 226
6.1 Introduction 228
Trusses 229
6.2 Definition of a Truss 229
6.3 Simple Trusses 231
6.4 Analysis of Trusses by the Method of Joints 232
6.5 Joints under Special Loading Conditions 234
6.6 Analysis of Trusses by the Method of Sections 240
*6.7 Trusses Made of Several Simple Trusses 241
Frames and Machines 248
6.8 Structures Containing Multiforce Members 248
6.9 Analysis of a Frame 248
6.10 Frames Which Cease to Be Rigid when
Detached from Their Supports 249
6.11 Machines 260
Review and Summary 271
Review Problems 274
7 Distributed Forces: Moments of
Inertia of Areas 276
7.1 Introduction 278
7.2 Second Moment, or Moment of Inertia, of an Area 278
7.3 Determination of the Moment of Inertia
of an Area by Integration 279
7.4 Polar Moment of Inertia 281
7.5 Radius of Gyration of an Area 282
7.6 Parallel-Axis Theorem 287
7.7 Moments of Inertia of Composite Areas 288
Review and Summary 295
Review Problems 297
8 Concepts of Stress 300
8.1 Introduction 302
8.2 Stresses in the Members of a Structure 302
8.3 Axial Loading. Normal Stress 303
8.4 Shearing Stress 305
8.5 Bearing Stress in Connections 306
8.6 Application to the Analysis of a Simple Structure 307
8.7 Design 312
8.8 Stress on an Oblique Plane under Axial Loading 320
8.9 Stress under General Loading Conditions.
Components of Stress 321
8.10 Design Considerations 324
Review and Summary 335
Review Problems 338
9 Stress and Strain—Axial
Loading 342
9.1 Introduction 344
9.2 Normal Strain under Axial Loading 345
9.3 Stress-Strain Diagram 346
9.4 Hooke’s Law. Modulus of Elasticity 351
*9.5 Elastic versus Plastic Behavior of a Material 352
*9.6 Repeated Loadings. Fatigue 354
9.7 Deformations of Members under Axial Loading 355
9.8 Statically Indeterminate Problems 364
9.9 Problems Involving Temperature Changes
9.10 Poisson’s Ratio 379
9.11 Multiaxial Loading: Generalized Hooke’s Law 380
9.12 Shearing Strain 382
*9.13 Further Discussion of Deformations under
Axial Loading. Relation Among E, n, and G 385
9.14 Stress and Strain Distribution under
Axial Loading. Saint-Venant’s Principle 391
9.15 Stress Concentrations 393
Review and Summary 397
Review Problems 402
10 Torsion 406
10.1 Introduction 408
10.2 Preliminary Discussion of the Stresses in a Shaft 409
10.3 Deformations in a Circular Shaft 411
10.4 Stresses 413
10.5 Angle of Twist 423
10.6 Statically Indeterminate Shafts 427
Review and Summary 437
Review Problems 439
11 Pure Bending 442
11.1 Introduction 444
11.2 Symmetric Member in Pure Bending 446
11.3 Deformations in a Symmetric Member in Pure Bending 448
11.4 Stresses and Deformations 451
11.5 Bending of Materials Made of Several Materials 461
11.6 Eccentric Axial Loading in a Plane of Symmetry 471
*11.7 Unsymmetric Bending 479
*11.8 General Case of Eccentric Axial Loading 485
Review and Summary 493
Review Problems 496
12 Analysis and Design of
Beams for Bending 500
12.1 Introduction 502
12.2 Shear and Bending-Moment Diagrams 505
12.3 Relations among Load, Shear, and Bending Moment 514
12.4 Design of Prismatic Beams for Bending 524
Review and Summary 531
Review Problems 533
13 Shearing Stresses in Beams and
Thin-Walled Members 536
13.1 Introduction 538
13.2 Shear on the Horizontal Face of a Beam Element 540
13.3 Determination of the Shearing Stresses in a Beam 542
13.4 Shearing Stresses txy in Common Types of Beams 543
13.5 Longitudinal Shear on a Beam Element of Arbitrary
Shape 552
13.6 Shearing Stresses in Thin-Walled Members 554
Review and Summary 564
Review Problems 566
14 Transformations of Stress 570
14.1 Introduction 572
14.2 Transformation of Plane Stress 574
14.3 Principal Stresses. Maximum Shearing Stresses 575
14.4 Mohr’s Circle for Plane Stress 582
14.5 Stresses in Thin-Walled Pressure Vessels 592
Review and Summary 599
Review Problems 602
15 Deflection of Beams 604
15.1 Introduction 606
15.2 Deformation of a Beam under Transverse Loading 607
15.3 Equation of the Elastic Curve 608
15.4 Direct Determination of the Elastic
Curve from the Load Distribution 614
15.5 Statically Indeterminate Beams 616
15.6 Method of Superposition 624
15.7 Application of Superposition to Statically
Indeterminate Beams 626
Review and Summary 634
Review Problems 637
16 Columns 640
16.1 Introduction 642
16.2 Stability of Structures 642
16.3 Euler’s Formula for Pin-Ended Columns 644
16.4 Extension of Euler’s Formula to Columns
with Other End Conditions 648
*16.5 Design of Columns under a Concentric Load 658
Review and Summary 670
Review Problems 672
Appendices 675
A Typical Properties of Selected Materials
Used in Engineering 676
B Properties of Rolled-Steel Shapes 680
C Beam Deflections and Slopes 692
Photo Credits 693
Index 695
Answers to Problems 705

أتمنى أن تستفيدوا منه وأن ينال إعجابكم



الرجوع الى أعلى الصفحة اذهب الى الأسفل
Admin
مدير المنتدى
مدير المنتدى


عدد المساهمات : 14273
تاريخ التسجيل : 01/07/2009

مُساهمةموضوع: رد: كتاب Statics and Mechanics of Materials   الخميس 18 أكتوبر 2012, 7:36 pm

تم تعديل الرابط

الرجوع الى أعلى الصفحة اذهب الى الأسفل
Eng.Starnight715
مهندس فعال جدا
مهندس فعال جدا


عدد المساهمات : 394
تاريخ التسجيل : 07/10/2012

مُساهمةموضوع: رد: كتاب Statics and Mechanics of Materials   الخميس 18 أكتوبر 2012, 7:46 pm

الرجوع الى أعلى الصفحة اذهب الى الأسفل
Admin
مدير المنتدى
مدير المنتدى


عدد المساهمات : 14273
تاريخ التسجيل : 01/07/2009

مُساهمةموضوع: رد: كتاب Statics and Mechanics of Materials   الخميس 18 أكتوبر 2012, 7:55 pm

starnight715 كتب:


الرجوع الى أعلى الصفحة اذهب الى الأسفل
rambomenaa
كبير مهندسين
كبير مهندسين


عدد المساهمات : 2044
تاريخ التسجيل : 21/01/2012

مُساهمةموضوع: رد: كتاب Statics and Mechanics of Materials   الأحد 21 أكتوبر 2012, 6:05 am

الرجوع الى أعلى الصفحة اذهب الى الأسفل
Admin
مدير المنتدى
مدير المنتدى


عدد المساهمات : 14273
التقييم : 22960
تاريخ التسجيل : 01/07/2009
العمر : 28
الدولة : مصر
العمل : مدير منتدى هندسة الإنتاج والتصميم الميكانيكى
الجامعة : المنوفية

مُساهمةموضوع: رد: كتاب Statics and Mechanics of Materials   الأحد 21 أكتوبر 2012, 8:35 am

@rambomenaa كتب:


الرجوع الى أعلى الصفحة اذهب الى الأسفل
محمد محمد أحمد
مهندس فعال جدا جدا
مهندس فعال جدا جدا


عدد المساهمات : 656
التقييم : 700
تاريخ التسجيل : 14/11/2012
العمر : 24
الدولة : EGYPT
العمل : Student
الجامعة : Menoufia

مُساهمةموضوع: رد: كتاب Statics and Mechanics of Materials   الجمعة 08 أغسطس 2014, 6:50 pm

جزاك الله خيرا

الرجوع الى أعلى الصفحة اذهب الى الأسفل
 

كتاب Statics and Mechanics of Materials

استعرض الموضوع السابق استعرض الموضوع التالي الرجوع الى أعلى الصفحة 
صفحة 3 من اصل 2انتقل الى الصفحة : الصفحة السابقة  1, 2

خدمات الموضوع
 KonuEtiketleri كلمات دليليه
كتاب Statics and Mechanics of Materials , كتاب Statics and Mechanics of Materials , كتاب Statics and Mechanics of Materials ,كتاب Statics and Mechanics of Materials ,كتاب Statics and Mechanics of Materials , كتاب Statics and Mechanics of Materials
 KonuLinki رابط الموضوع
 Konu BBCode BBCode
 KonuHTML Kodu HTMLcode
إذا وجدت وصلات لاتعملفي الموضوع او أن الموضوع [ كتاب Statics and Mechanics of Materials ] مخالف ,, من فضلك راسل الإدارة من هنا
صلاحيات هذا المنتدى:لاتستطيع الرد على المواضيع في هذا المنتدى
منتدى هندسة الإنتاج والتصميم الميكانيكى :: المنتديات الهندسية :: منتدى الكتب والمحاضرات الهندسية :: منتدى الكتب والمحاضرات الهندسية الأجنبية-