| 1 | |
| 00:00:05,160 --> 00:00:08,000 | |
| بسم الله الرحمن الرحيم السلام عليكم و رحمة الله | |
| 2 | |
| 00:00:08,000 --> 00:00:12,660 | |
| وبركاته هنكمل في مادة تصميم الألات واحد المحاضرات | |
| 3 | |
| 00:00:12,660 --> 00:00:15,520 | |
| السابقة و بعدين هنحكي عن ال failure due to static | |
| 4 | |
| 00:00:15,520 --> 00:00:19,120 | |
| loading حكينا على ال maximum shear stress theory و | |
| 5 | |
| 00:00:19,120 --> 00:00:24,620 | |
| ال distortion energy theory حلينا example هنحل كم | |
| 6 | |
| 00:00:24,620 --> 00:00:27,320 | |
| عن example و بعدين هنكمل على ال design theories | |
| 7 | |
| 00:00:27,320 --> 00:00:32,220 | |
| for brittle materials فال example اللي هو خمس | |
| 8 | |
| 00:00:32,220 --> 00:00:39,930 | |
| أربعة فيه عندى ال tubeتحت اثير axial force P و | |
| 9 | |
| 00:00:39,930 --> 00:00:48,730 | |
| transverse force F و فيه torque T النبوب | |
| 10 | |
| 00:00:48,730 --> 00:00:54,670 | |
| مصنوع من ال aluminium ال | |
| 11 | |
| 00:00:54,670 --> 00:01:01,910 | |
| material يعني 2014 | |
| 12 | |
| 00:01:01,910 --> 00:01:04,970 | |
| aluminium alloy | |
| 13 | |
| 00:01:07,970 --> 00:01:11,450 | |
| الـ yield strength ميتين و ستة و سبعين ميجا باسكال | |
| 14 | |
| 00:01:11,450 --> 00:01:21,590 | |
| We | |
| 15 | |
| 00:01:21,590 --> 00:01:27,490 | |
| wish to select a stock size tube from table A8 من | |
| 16 | |
| 00:01:27,490 --> 00:01:35,710 | |
| تابل A8 هنعمل select standard | |
| 17 | |
| 00:01:40,710 --> 00:01:48,870 | |
| tube size بستخدم | |
| 18 | |
| 00:01:48,870 --> 00:01:58,210 | |
| design factor and design بالساوية أربعة كيمية | |
| 19 | |
| 00:01:58,210 --> 00:02:03,690 | |
| ال bending force ال F واحد بون سبعة خمسة كيلو | |
| 20 | |
| 00:02:03,690 --> 00:02:04,150 | |
| نيوتن | |
| 21 | |
| 00:02:08,300 --> 00:02:14,180 | |
| و ال axle load P تسعة | |
| 22 | |
| 00:02:14,180 --> 00:02:19,460 | |
| كيلو نيوتن و | |
| 23 | |
| 00:02:19,460 --> 00:02:23,700 | |
| ال torque اتنين | |
| 24 | |
| 00:02:23,700 --> 00:02:27,700 | |
| و سبعين نيوتن متر | |
| 25 | |
| 00:02:33,610 --> 00:02:37,850 | |
| بنعمل select ل standard tube based على ان دي | |
| 26 | |
| 00:02:37,850 --> 00:02:42,470 | |
| بيستخدم أربعة الان | |
| 27 | |
| 00:02:42,470 --> 00:02:44,510 | |
| لما نتطلع فانا عندي هاي الانبوب | |
| 28 | |
| 00:03:03,530 --> 00:03:13,750 | |
| فى force P فى | |
| 29 | |
| 00:03:13,750 --> 00:03:23,030 | |
| عندى force F عندى torque Tao | |
| 30 | |
| 00:03:23,030 --> 00:03:29,190 | |
| هيكون عندى critical element عند A يعني فى عندى | |
| 31 | |
| 00:03:29,190 --> 00:03:32,470 | |
| critical element لو بدى اعمل هنا مكعب | |
| 32 | |
| 00:03:41,710 --> 00:03:46,910 | |
| صغير على السطح الخارجي للانبوبة طبعا هذا المحور هو | |
| 33 | |
| 00:03:46,910 --> 00:03:52,430 | |
| ال X هذا | |
| 34 | |
| 00:03:52,430 --> 00:03:56,370 | |
| ال Y وهذا | |
| 35 | |
| 00:03:56,370 --> 00:03:59,590 | |
| ال | |
| 36 | |
| 00:03:59,590 --> 00:03:59,830 | |
| Z | |
| 37 | |
| 00:04:05,630 --> 00:04:11,250 | |
| الـ bending force F و ال axial force P بيعملوا | |
| 38 | |
| 00:04:11,250 --> 00:04:17,050 | |
| number of stress على ال element يا ده | |
| 39 | |
| 00:04:17,050 --> 00:04:23,550 | |
| Sigma | |
| 40 | |
| 00:04:23,550 --> 00:04:24,010 | |
| X | |
| 41 | |
| 00:04:36,280 --> 00:04:40,180 | |
| وبتعمل share stress ال torque هذا بعمل share | |
| 42 | |
| 00:04:40,180 --> 00:04:56,580 | |
| stress اللي | |
| 43 | |
| 00:04:56,580 --> 00:05:08,490 | |
| هو هيكون TAO X Z طبعا فيه ترمز في share stressبس | |
| 44 | |
| 00:05:08,490 --> 00:05:15,410 | |
| هنعمله فى translational stress جاى باتجاه اللى هى | |
| 45 | |
| 00:05:15,410 --> 00:05:21,990 | |
| تاو XY تاو XY مظبوط بس هنعمله لما اطلع من ال top | |
| 46 | |
| 00:05:21,990 --> 00:05:28,710 | |
| view هشوف ال X على ال element هشوف ال X زد بلاني | |
| 47 | |
| 00:05:28,710 --> 00:05:33,250 | |
| يعني هيكون ال element جاى | |
| 48 | |
| 00:05:33,250 --> 00:05:37,630 | |
| زى كده عندى هيكون sigma X | |
| 49 | |
| 00:05:57,480 --> 00:06:11,340 | |
| التاو X Z ال | |
| 50 | |
| 00:06:11,340 --> 00:06:18,260 | |
| sigma X هتكون جزء | |
| 51 | |
| 00:06:18,260 --> 00:06:24,820 | |
| due to bending moment هيكون M في C على I | |
| 52 | |
| 00:06:27,920 --> 00:06:40,420 | |
| زاد جزء ديو للأكسل loading زاد P على A و ال tau XZ | |
| 53 | |
| 00:06:40,420 --> 00:06:53,200 | |
| ديو تيتورين تاو XZ بستوي T في R على J | |
| 54 | |
| 00:06:57,000 --> 00:07:01,720 | |
| طبعا عشان اعرف ال .. ال C و ال I و ال A و ال J و | |
| 55 | |
| 00:07:01,720 --> 00:07:07,280 | |
| ال R لازم نكون عارف نقطع صح؟ فانا هروح على ال | |
| 56 | |
| 00:07:07,280 --> 00:07:08,240 | |
| table A تماميا | |
| 57 | |
| 00:07:47,220 --> 00:07:54,000 | |
| عند ال appendix خمناه على ال .. | |
| 58 | |
| 00:07:54,000 --> 00:07:58,320 | |
| هذا الستة | |
| 59 | |
| 00:07:58,320 --> 00:08:07,280 | |
| ال a تمانية طبعا | |
| 60 | |
| 00:08:07,280 --> 00:08:12,300 | |
| ال a تمانية معطيني ال .. ال .. ال مواصفات الأنابيب | |
| 61 | |
| 00:08:12,300 --> 00:08:21,410 | |
| بال inch system بال metric systemمعطينا .. لو | |
| 62 | |
| 00:08:21,410 --> 00:08:23,850 | |
| أشتغلنا على ال metering ماتعطينا ال unit mass أكم | |
| 63 | |
| 00:08:23,850 --> 00:08:28,890 | |
| كيلو جرام في ال meterومعطيني مساحة المقطع بالصمت | |
| 64 | |
| 00:08:28,890 --> 00:08:36,830 | |
| مربع وال I بالصمت مربع أس أربع وال J بالصمت متر أس | |
| 65 | |
| 00:08:36,830 --> 00:08:41,530 | |
| أربع وال radius و ال gyration بالصمت و ال section | |
| 66 | |
| 00:08:41,530 --> 00:08:48,070 | |
| modulus في الصمت متر تكييب و ال size اللي هو هاي | |
| 67 | |
| 00:08:48,070 --> 00:08:51,390 | |
| ال size عبارة عن ال OD في ال thickness | |
| 68 | |
| 00:09:02,600 --> 00:09:12,840 | |
| يعني ال size هيكون هذا | |
| 69 | |
| 00:09:12,840 --> 00:09:21,200 | |
| ال OD وهذا | |
| 70 | |
| 00:09:21,200 --> 00:09:24,520 | |
| ال | |
| 71 | |
| 00:09:24,520 --> 00:09:24,880 | |
| thickness | |
| 72 | |
| 00:09:30,290 --> 00:09:34,790 | |
| حسب يعني ممكن تشغل هيك او تستخدم z لان انت هتختار | |
| 73 | |
| 00:09:34,790 --> 00:09:42,950 | |
| الأول خطوة هتختار ال section اللي هو لو عملنا جدول | |
| 74 | |
| 00:09:42,950 --> 00:09:50,250 | |
| ال | |
| 75 | |
| 00:09:50,250 --> 00:09:50,770 | |
| section | |
| 76 | |
| 00:09:59,840 --> 00:10:06,560 | |
| أنا مش عارف ممكن أختار section أبدأ عشرين في أربعة | |
| 77 | |
| 00:10:06,560 --> 00:10:19,260 | |
| مثلا عشرين في أربعة صح؟ بالزمن | |
| 78 | |
| 00:10:19,260 --> 00:10:26,720 | |
| ال A عشرين | |
| 79 | |
| 00:10:26,720 --> 00:10:38,730 | |
| في أربعة اللي هي بتكون ال Aاتنين point او وان ال | |
| 80 | |
| 00:10:38,730 --> 00:10:49,910 | |
| I اللي | |
| 81 | |
| 00:10:49,910 --> 00:10:52,150 | |
| هو ستة تمانية اربعة | |
| 82 | |
| 00:11:00,050 --> 00:11:14,650 | |
| و ال J واحد | |
| 83 | |
| 00:11:28,360 --> 00:11:37,820 | |
| الـ C هتكون هتكون | |
| 84 | |
| 00:11:37,820 --> 00:11:43,760 | |
| دي على اتنين هي الملي ميتر دي عندي ال او دي اكم | |
| 85 | |
| 00:11:43,760 --> 00:11:53,340 | |
| عشرين على اتنين عشرة و انا | |
| 86 | |
| 00:11:53,340 --> 00:12:02,700 | |
| تحيل زي الان احسبعندي ال M هنا، إيش يساوي ال M؟ F | |
| 87 | |
| 00:12:02,700 --> 00:12:10,360 | |
| في L ال M ال | |
| 88 | |
| 00:12:10,360 --> 00:12:19,540 | |
| L مية و عشرين وال F كم؟ واحد point سبعة خمسة في | |
| 89 | |
| 00:12:19,540 --> 00:12:23,820 | |
| مية و عشرين تطلع كم؟ | |
| 90 | |
| 00:12:27,140 --> 00:12:31,700 | |
| احسبوها واحد point سبعة خمسة في اتنين تلاتة و نص | |
| 91 | |
| 00:12:31,700 --> 00:12:40,260 | |
| في اتنين سبعة في تلاتة واحد و عشرين نيوتن | |
| 92 | |
| 00:12:40,260 --> 00:12:53,580 | |
| متر وال | |
| 93 | |
| 00:12:53,580 --> 00:12:54,620 | |
| R هي F تساوي | |
| 94 | |
| 00:12:58,290 --> 00:13:05,870 | |
| ساوة C مرة | |
| 95 | |
| 00:13:05,870 --> 00:13:17,930 | |
| و هحسب Sigma X و | |
| 96 | |
| 00:13:17,930 --> 00:13:24,670 | |
| هحسب Tau XZ | |
| 97 | |
| 00:13:31,450 --> 00:13:37,810 | |
| بعدين من more circle من more circle | |
| 98 | |
| 00:13:37,810 --> 00:13:43,850 | |
| اه | |
| 99 | |
| 00:13:43,850 --> 00:13:50,090 | |
| يعني هحسب ممكن احسب tau maximum يعني اذا بدنا نعمل | |
| 100 | |
| 00:13:50,090 --> 00:13:54,850 | |
| more circle بلزم نقش اوجد ال center بتاع more | |
| 101 | |
| 00:13:54,850 --> 00:13:58,490 | |
| circle اللي هو sigma x زي sigma y على 2 صح؟ | |
| 102 | |
| 00:14:00,740 --> 00:14:07,160 | |
| سيجما اكس زي سيجما واي على اتنين سواء سيجما اكس | |
| 103 | |
| 00:14:07,160 --> 00:14:12,520 | |
| على اتنين Ic | |
| 104 | |
| 00:14:12,520 --> 00:14:20,720 | |
| و | |
| 105 | |
| 00:14:20,720 --> 00:14:28,930 | |
| ال radiusتاع more circle هكون جزر تربيعي ل sigma x | |
| 106 | |
| 00:14:28,930 --> 00:14:37,950 | |
| على 2 لكل تربيع زي ال tau xy تربيع يعني هنحسب ال | |
| 107 | |
| 00:14:37,950 --> 00:14:42,510 | |
| radius ل | |
| 108 | |
| 00:14:42,510 --> 00:14:52,230 | |
| mega Pascal ل more circle اللي هي بتساوي | |
| 109 | |
| 00:14:55,620 --> 00:15:04,200 | |
| tau max بعدين | |
| 110 | |
| 00:15:04,200 --> 00:15:10,080 | |
| هستخدم design theory مثلا بدأ استخدم ال distortion | |
| 111 | |
| 00:15:10,080 --> 00:15:17,400 | |
| energy تليه نحكي distortion use distortion energy | |
| 112 | |
| 00:15:17,400 --> 00:15:22,280 | |
| theory حكي ان ال tau max | |
| 113 | |
| 00:15:25,150 --> 00:15:36,030 | |
| هتكون تستوي SSY على N Design او ال N بتساوي | |
| 114 | |
| 00:15:36,030 --> 00:15:43,010 | |
| SSY على Tau Max وشوف | |
| 115 | |
| 00:15:43,010 --> 00:15:52,490 | |
| اذا اربع او اكتر بيكون الحل شغلي صحيح طيب ال SSY | |
| 116 | |
| 00:15:52,490 --> 00:15:53,010 | |
| ايش بتساوي | |
| 117 | |
| 00:15:56,220 --> 00:16:00,400 | |
| في حالة distortion energy theory احنا عاكي النظرات | |
| 118 | |
| 00:16:00,400 --> 00:16:07,200 | |
| كلها نفس الاشي ان ال tau max يستوى SSY على N بس | |
| 119 | |
| 00:16:07,200 --> 00:16:11,320 | |
| اللي بيختلف في ال definition تاع ال SSY وظبط ال | |
| 120 | |
| 00:16:11,320 --> 00:16:16,560 | |
| SSY هتكون point خمسة SY | |
| 121 | |
| 00:16:16,560 --> 00:16:22,920 | |
| يعني هتكون تساوي point خمس سبعة سبعة | |
| 122 | |
| 00:16:27,760 --> 00:16:37,420 | |
| في الأسواع اللي هي متين وستة وسبعين هي | |
| 123 | |
| 00:16:37,420 --> 00:16:46,880 | |
| نحصل factor of safety نعم | |
| 124 | |
| 00:16:46,880 --> 00:16:49,180 | |
| أكمل | |
| 125 | |
| 00:16:57,220 --> 00:17:04,180 | |
| عشان سرة ممكن اعمل اكسل شيط اكسل | |
| 126 | |
| 00:17:04,180 --> 00:17:04,820 | |
| شيط | |
| 127 | |
| 00:17:26,050 --> 00:17:31,290 | |
| يعني هعمل .. انا هعمله أفقي عندي هنا رقم واحد | |
| 128 | |
| 00:17:31,290 --> 00:17:38,470 | |
| بعدين عندي ال | |
| 129 | |
| 00:17:38,470 --> 00:17:50,370 | |
| .. ال parameter أو ال variable بعدين | |
| 130 | |
| 00:17:50,370 --> 00:17:51,570 | |
| ال symbol بتاعه | |
| 131 | |
| 00:17:58,070 --> 00:18:25,550 | |
| و بعدين ال unit و بعدين ال value طيب | |
| 132 | |
| 00:18:25,550 --> 00:18:26,790 | |
| أول شي احنا عايش | |
| 133 | |
| 00:18:31,170 --> 00:18:41,350 | |
| اللي هو ال section هحكي | |
| 134 | |
| 00:18:41,350 --> 00:18:49,010 | |
| ال value بتاعتي اللي هو عشرين في أربع صح بعدين | |
| 135 | |
| 00:18:49,010 --> 00:18:53,630 | |
| هحسب ال OD ال | |
| 136 | |
| 00:18:53,630 --> 00:18:57,350 | |
| outside diameter | |
| 137 | |
| 00:19:01,040 --> 00:19:13,320 | |
| اللي هو ال OD ال | |
| 138 | |
| 00:19:13,320 --> 00:19:19,500 | |
| unit بتاعته millimeter الحلقة ده إيش هتكون ال OD؟ | |
| 139 | |
| 00:19:19,500 --> 00:19:21,160 | |
| عشرين صح؟ | |
| 140 | |
| 00:19:28,710 --> 00:19:32,790 | |
| و بعدين هحسب ال C اللي هو ال radius ال outside | |
| 141 | |
| 00:19:32,790 --> 00:19:36,150 | |
| radius | |
| 142 | |
| 00:19:36,150 --> 00:19:44,030 | |
| اللي | |
| 143 | |
| 00:19:44,030 --> 00:19:52,770 | |
| هو دي أحكي ال C أو | |
| 144 | |
| 00:19:52,770 --> 00:19:56,670 | |
| R صح؟ millimeter | |
| 145 | |
| 00:19:59,740 --> 00:20:08,980 | |
| هيكون بالثانوية والعشرين على اتنين طيب | |
| 146 | |
| 00:20:08,980 --> 00:20:13,340 | |
| من الجدول بلزمنا | |
| 147 | |
| 00:20:13,340 --> 00:20:18,680 | |
| مساحة المقطع ال A وال | |
| 148 | |
| 00:20:18,680 --> 00:20:22,760 | |
| I وال J صح؟ يعني نحكي هاي .. نحكي الرمز الأول عند | |
| 149 | |
| 00:20:22,760 --> 00:20:26,540 | |
| ال A وال | |
| 150 | |
| 00:20:26,540 --> 00:20:38,180 | |
| Iو الـ J ال | |
| 151 | |
| 00:20:38,180 --> 00:20:44,300 | |
| A لـ cross sectional area cross sectional | |
| 152 | |
| 00:20:44,300 --> 00:20:52,820 | |
| area اللي | |
| 153 | |
| 00:20:52,820 --> 00:21:01,680 | |
| هي هتكون centimeter تربيعأكمل اعطينا ايه هو؟ نين | |
| 154 | |
| 00:21:01,680 --> 00:21:09,220 | |
| فاصلة صفر واحد نين فاصلة صفر واحد واحد بعدين هنا | |
| 155 | |
| 00:21:09,220 --> 00:21:20,700 | |
| ال .. اللي هو cross moment moment | |
| 156 | |
| 00:21:20,700 --> 00:21:21,760 | |
| of inertia | |
| 157 | |
| 00:21:31,240 --> 00:21:37,180 | |
| of moment of area moment بنعرفش area moment | |
| 158 | |
| 00:21:37,180 --> 00:21:45,760 | |
| اللي | |
| 159 | |
| 00:21:45,760 --> 00:21:48,620 | |
| هي ال sound meter أربعة | |
| 160 | |
| 00:21:57,270 --> 00:22:07,510 | |
| طيب ماطينها أكم؟ سفر بس بس سفر ثمانية أربعة دي | |
| 161 | |
| 00:22:07,510 --> 00:22:15,930 | |
| هذي هتكون area polar polar هو مكتوب دي على الشاشة | |
| 162 | |
| 00:22:15,930 --> 00:22:19,570 | |
| برضه | |
| 163 | |
| 00:22:19,570 --> 00:22:22,910 | |
| هتكون | |
| 164 | |
| 00:22:22,910 --> 00:22:26,270 | |
| هذي أكم واحد نعم | |
| 165 | |
| 00:22:28,070 --> 00:22:37,570 | |
| أخدنا القدرة من ال table هي صح اللي بتحكي نعم؟ طيب | |
| 166 | |
| 00:22:37,570 --> 00:22:49,430 | |
| بعد ال I و الج إيش حسبنا؟ بدنا نحسب اللي هو normal | |
| 167 | |
| 00:22:56,950 --> 00:23:08,870 | |
| stress اللي هي sigma X هي ميجا باسكال بتساوي | |
| 168 | |
| 00:23:08,870 --> 00:23:17,250 | |
| إيش النمر ال stress اللي هي .. هنحكي التالي يعني | |
| 169 | |
| 00:23:17,250 --> 00:23:22,230 | |
| النمر ال stress due to axial | |
| 170 | |
| 00:23:29,630 --> 00:23:37,190 | |
| load ملزم نقش ال axel load ال | |
| 171 | |
| 00:23:37,190 --> 00:23:40,950 | |
| axel load | |
| 172 | |
| 00:23:40,950 --> 00:23:53,090 | |
| اللي هو P كيلو نيوتن تسعة هذه هتساوي | |
| 173 | |
| 00:24:01,120 --> 00:24:11,420 | |
| اللي هي P على ال area انت | |
| 174 | |
| 00:24:11,420 --> 00:24:15,660 | |
| طلع انت بدك تحول ال .. يعني هتضرب التسعة في عشر | |
| 175 | |
| 00:24:15,660 --> 00:24:22,000 | |
| أقصى تلاتة و ال area هتقسم على عشر أقص ناقص أربعة | |
| 176 | |
| 00:24:24,430 --> 00:24:27,630 | |
| مظبوط يعني هتضرب ال .. بعدين هتضرب في عشرة أص ناقص | |
| 177 | |
| 00:24:27,630 --> 00:24:32,030 | |
| ستة سيغناق .. ده هتضرب هذا في عشرة معناته هذا حس | |
| 178 | |
| 00:24:32,030 --> 00:24:48,470 | |
| سوى عشرة في على .. على هذه بعدين | |
| 179 | |
| 00:24:48,470 --> 00:24:50,510 | |
| ده normal stress | |
| 180 | |
| 00:24:57,670 --> 00:25:06,030 | |
| not stressed due due | |
| 181 | |
| 00:25:06,030 --> 00:25:12,710 | |
| to bending moment بدنايه | |
| 182 | |
| 00:25:12,710 --> 00:25:16,410 | |
| بلاقياش ال | |
| 183 | |
| 00:25:16,410 --> 00:25:17,930 | |
| bending moment moment | |
| 184 | |
| 00:25:31,250 --> 00:25:38,350 | |
| اللي هى M يبقى ال bending point إيش بدناه ال | |
| 185 | |
| 00:25:38,350 --> 00:25:43,130 | |
| bending ال .. ال .. ال .. ال transverse load اللي | |
| 186 | |
| 00:25:43,130 --> 00:25:51,390 | |
| هى HF ال transverse load | |
| 187 | |
| 00:25:51,390 --> 00:25:54,530 | |
| اللي | |
| 188 | |
| 00:25:54,530 --> 00:26:01,950 | |
| هو كيلو نيوتن أكتر ما أعطينيهاواحد وانت سبعة خمسة | |
| 189 | |
| 00:26:01,950 --> 00:26:09,610 | |
| كيلو نيوتن بندق moment هتكون تساوي بدك اللي هو | |
| 190 | |
| 00:26:09,610 --> 00:26:12,930 | |
| length | |
| 191 | |
| 00:26:12,930 --> 00:26:14,210 | |
| of county labor | |
| 192 | |
| 00:26:28,260 --> 00:26:44,440 | |
| اللي هو قل ملي متر مية و عشرين مضمونه هتكون طيب | |
| 193 | |
| 00:26:44,440 --> 00:26:50,560 | |
| هذا هتكون نيوتن متر | |
| 194 | |
| 00:26:50,560 --> 00:26:55,080 | |
| هتكون | |
| 195 | |
| 00:26:55,080 --> 00:27:04,450 | |
| هذه اللي هوتسميها دي SX SXA | |
| 196 | |
| 00:27:04,450 --> 00:27:14,590 | |
| اه | |
| 197 | |
| 00:27:14,590 --> 00:27:18,490 | |
| عشان | |
| 198 | |
| 00:27:18,490 --> 00:27:26,030 | |
| في S Y مش | |
| 199 | |
| 00:27:26,030 --> 00:27:26,330 | |
| خلاص | |
| 200 | |
| 00:27:40,320 --> 00:27:44,120 | |
| طيب طيب بعد عند هنا | |
| 201 | |
| 00:28:00,040 --> 00:28:07,140 | |
| طيب هذه هتكون برضه ميجا باسكال هتكون | |
| 202 | |
| 00:28:07,140 --> 00:28:13,000 | |
| تستاوى هتساوى | |
| 203 | |
| 00:28:13,000 --> 00:28:19,280 | |
| M في C في | |
| 204 | |
| 00:28:19,280 --> 00:28:21,360 | |
| عشرة على I | |
| 205 | |
| 00:28:28,150 --> 00:28:32,810 | |
| يعني انا عندي يعني ايه اللي هسوي عندي M في C على I | |
| 206 | |
| 00:28:32,810 --> 00:28:43,390 | |
| الوحدات M في C على I عندي هين .. هين نيوتر متر و | |
| 207 | |
| 00:28:43,390 --> 00:28:47,670 | |
| ال C ملي متر حضوره في عشرة أقل سالب تلاتة عشان C | |
| 208 | |
| 00:28:47,670 --> 00:28:53,670 | |
| المتر مظبوط و ال I سامة متر مصر أربعة هتكون عشرة | |
| 209 | |
| 00:28:53,670 --> 00:28:57,530 | |
| عشرة أقل سالب تمانية | |
| 210 | |
| 00:28:59,960 --> 00:29:11,160 | |
| وهى نضرف عشرة والسالب ستة يعنى هتكون عندك السالب | |
| 211 | |
| 00:29:11,160 --> 00:29:22,480 | |
| تسعة يعني نقسمها لعشرة هذه نقسمها | |
| 212 | |
| 00:29:22,480 --> 00:29:22,900 | |
| لعشرة | |
| 213 | |
| 00:29:29,760 --> 00:29:36,400 | |
| طيب أكد هيك صح؟ | |
| 214 | |
| 00:29:36,400 --> 00:29:41,700 | |
| قسمنا على عشرة معناته | |
| 215 | |
| 00:29:41,700 --> 00:29:50,520 | |
| ال total axial stress | |
| 216 | |
| 00:29:50,520 --> 00:29:54,180 | |
| اللي | |
| 217 | |
| 00:29:54,180 --> 00:29:54,440 | |
| هو | |
| 218 | |
| 00:30:02,030 --> 00:30:17,390 | |
| هكون ميجا باسكال بيكون بيساوي هذه زاد هذه وده | |
| 219 | |
| 00:30:17,390 --> 00:30:21,250 | |
| نحسب اللي | |
| 220 | |
| 00:30:21,250 --> 00:30:22,710 | |
| هو maximum shear | |
| 221 | |
| 00:30:37,960 --> 00:30:42,800 | |
| stress اه لسه .. لسه هي باللي بدنا نحسب إيه؟ بدنا | |
| 222 | |
| 00:30:42,800 --> 00:30:46,560 | |
| نحسب .. | |
| 223 | |
| 00:30:46,560 --> 00:30:51,860 | |
| بدنا نحسب اللي هو ال .. the original shear stress | |
| 224 | |
| 00:30:51,860 --> 00:30:56,960 | |
| .. the original shear | |
| 225 | |
| 00:31:02,550 --> 00:31:09,390 | |
| stress اللي هي ال tau xz | |
| 226 | |
| 00:31:09,390 --> 00:31:16,130 | |
| ميجا باسكال هتكون | |
| 227 | |
| 00:31:16,130 --> 00:31:23,710 | |
| تستاوي ال torque مش | |
| 228 | |
| 00:31:23,710 --> 00:31:29,930 | |
| موجود؟ طيب ال | |
| 229 | |
| 00:31:29,930 --> 00:31:30,350 | |
| torque | |
| 230 | |
| 00:31:35,450 --> 00:31:42,250 | |
| اللي هو T Newton | |
| 231 | |
| 00:31:42,250 --> 00:31:59,150 | |
| متر 72 هذا هتساوي ال torque في R اللي هي هذه على J | |
| 232 | |
| 00:31:59,150 --> 00:32:02,550 | |
| على عشرة | |
| 233 | |
| 00:32:05,940 --> 00:32:13,160 | |
| ماعرف اه ماهي نفس الاشي هتكون ال maximum shear | |
| 234 | |
| 00:32:13,160 --> 00:32:17,160 | |
| stress اللي | |
| 235 | |
| 00:32:17,160 --> 00:32:27,360 | |
| هي tau max mega Pascal هتساوي | |
| 236 | |
| 00:32:27,360 --> 00:32:28,680 | |
| square root | |
| 237 | |
| 00:32:32,980 --> 00:32:40,580 | |
| سيجما اكس على اتنين سيجما | |
| 238 | |
| 00:32:40,580 --> 00:33:00,320 | |
| اكس على اتنين كل تربيع زاد طيب | |
| 239 | |
| 00:33:02,900 --> 00:33:10,940 | |
| ال C كانت ال syntax نعم مش هتلزمنا خلنا كده ندحس | |
| 240 | |
| 00:33:10,940 --> 00:33:18,100 | |
| بال yield strength yield strength in share | |
| 241 | |
| 00:33:18,100 --> 00:33:21,700 | |
| according | |
| 242 | |
| 00:33:21,700 --> 00:33:29,280 | |
| to | |
| 243 | |
| 00:33:29,280 --> 00:33:31,920 | |
| distortion energy theory | |
| 244 | |
| 00:33:34,960 --> 00:33:44,040 | |
| هذا هتكون S S Y ميجا | |
| 245 | |
| 00:33:44,040 --> 00:33:47,880 | |
| بسكال الهوضان | |
| 246 | |
| 00:33:47,880 --> 00:34:00,660 | |
| دي يكون عندهين ال yield strength اللي | |
| 247 | |
| 00:34:00,660 --> 00:34:01,720 | |
| هي S Y | |
| 248 | |
| 00:34:10,330 --> 00:34:23,850 | |
| هذه هتكون تستاوي point 77 طيب | |
| 249 | |
| 00:34:32,180 --> 00:34:36,120 | |
| معناته حيجي بعد هيك اللي هو ال factor of safety | |
| 250 | |
| 00:34:36,120 --> 00:34:41,740 | |
| صح؟ factor of | |
| 251 | |
| 00:34:41,740 --> 00:34:46,720 | |
| safety هو | |
| 252 | |
| 00:34:46,720 --> 00:34:50,260 | |
| n بالساعة | |
| 253 | |
| 00:34:50,260 --> 00:34:56,140 | |
| هذا على tau max | |
| 254 | |
| 00:35:03,160 --> 00:35:06,820 | |
| بنعمل اكتر من اربعة فهذا لا يتوفر معناته هنروح | |
| 255 | |
| 00:35:06,820 --> 00:35:10,600 | |
| نغير اللي | |
| 256 | |
| 00:35:10,600 --> 00:35:17,700 | |
| عنده ال section خلنا ناخده ناخده مثلا نعتبره نحكي | |
| 257 | |
| 00:35:17,700 --> 00:35:26,100 | |
| خمسين في اربعة خمسين في اربعة هذه خمسين خلنا نحكي | |
| 258 | |
| 00:35:26,100 --> 00:35:31,880 | |
| خمسين | |
| 259 | |
| 00:35:33,500 --> 00:35:43,200 | |
| خمسين فى أربعة ايه انا هاتكون؟ نعم اه | |
| 260 | |
| 00:35:43,200 --> 00:35:45,900 | |
| ممكن تعمل value one value two value three تعمل كذا | |
| 261 | |
| 00:35:45,900 --> 00:35:52,160 | |
| عامل بسير اه هو التالى يعني تحكي عن تانى عشرين فى | |
| 262 | |
| 00:35:52,160 --> 00:35:57,060 | |
| أربعة كده هو بيحكي لك تعمل value two | |
| 263 | |
| 00:36:05,060 --> 00:36:13,840 | |
| هتكون عندي هنا خمسين في أربع عندي هنا ال O D خمسين | |
| 264 | |
| 00:36:13,840 --> 00:36:23,020 | |
| ال O D طيب | |
| 265 | |
| 00:36:23,020 --> 00:36:29,220 | |
| ال cross section هتجيبها من ال table اللي | |
| 266 | |
| 00:36:29,220 --> 00:36:32,240 | |
| هو عندك ال A اللي هي خمسة point سبعة سبعة تمانية | |
| 267 | |
| 00:36:36,260 --> 00:36:47,460 | |
| وال I خمس عشر point و ال J ال | |
| 268 | |
| 00:36:47,460 --> 00:36:53,040 | |
| J تلاتين | |
| 269 | |
| 00:36:53,040 --> 00:36:59,640 | |
| تمانية و عشرة طيب | |
| 270 | |
| 00:36:59,640 --> 00:37:01,240 | |
| هذه زي ما هي | |
| 271 | |
| 00:37:06,770 --> 00:37:08,790 | |
| و ال north to south slot اللي هي قاعدة زي ما هي | |
| 272 | |
| 00:37:08,790 --> 00:37:13,670 | |
| بتظلها ال | |
| 273 | |
| 00:37:13,670 --> 00:37:26,710 | |
| trans slot زي ما هو قاعد و قاعد زي ما هي طيب | |
| 274 | |
| 00:37:26,710 --> 00:37:29,830 | |
| نزل ال stress | |
| 275 | |
| 00:37:41,150 --> 00:37:49,870 | |
| هذا كله محسوب صح؟ | |
| 276 | |
| 00:37:49,870 --> 00:37:53,030 | |
| كبير | |
| 277 | |
| 00:37:53,030 --> 00:38:07,250 | |
| كتير، معناه تخليني اخد value three يعني | |
| 278 | |
| 00:38:07,250 --> 00:38:14,250 | |
| ممكن اخد اتنين و اربعينخلنا نحكي في خمسة اتنين | |
| 279 | |
| 00:38:14,250 --> 00:38:22,350 | |
| واربعين في خمسة انا | |
| 280 | |
| 00:38:22,350 --> 00:38:33,710 | |
| هكون واحد وعشرين صح اتنين واربعين خلنا | |
| 281 | |
| 00:38:33,710 --> 00:38:37,870 | |
| نسحب كلهم بعدين بنظبط علشان هتتظبط ماشي | |
| 282 | |
| 00:38:40,500 --> 00:38:49,020 | |
| لأ مش هعمل اللي حاله لأ فى عندى هدى صح ال A ال A و | |
| 283 | |
| 00:38:49,020 --> 00:39:01,060 | |
| ال I و ال J ال A أكم 8 0 9 و ال I ال | |
| 284 | |
| 00:39:01,060 --> 00:39:07,040 | |
| I أكم ال I عشرة point تلتاشر | |
| 285 | |
| 00:39:11,480 --> 00:39:24,220 | |
| هو ال J و هو الضعفة عشرين فاصلة ماشي | |
| 286 | |
| 00:39:24,220 --> 00:39:34,840 | |
| معناه انت ممكن تكون high value أربعة | |
| 287 | |
| 00:39:42,090 --> 00:39:44,690 | |
| هنحكي التلات .. هنجرب تلاتين في خمسة شوفوا إيش | |
| 288 | |
| 00:39:44,690 --> 00:39:47,990 | |
| سيصبح معناه تلاتين في خمسة و اكتبوا ال A و I و J | |
| 289 | |
| 00:39:47,990 --> 00:39:52,390 | |
| ال | |
| 290 | |
| 00:39:52,390 --> 00:40:04,890 | |
| A و I و J كتبتوهم؟ طيب تلاتين في خمسة يعني تلاتين | |
| 291 | |
| 00:40:20,130 --> 00:40:26,150 | |
| هنا عند ال A و ال I و ال J ال A اكم ال A تلاتة | |
| 292 | |
| 00:40:26,150 --> 00:40:29,550 | |
| فاصلة تسعة اتنين خمسة تلاتة فاصلة تسعة اتنين خمسة | |
| 293 | |
| 00:40:29,550 --> 00:40:38,190 | |
| و ال I اسمه تلاتة فاصلة واحد تسعة اتنين و ال J ستة | |
| 294 | |
| 00:40:38,190 --> 00:40:46,110 | |
| ستة فاصلة تلاتة تمانية واحد معناته | |
| 295 | |
| 00:40:46,110 --> 00:40:47,350 | |
| هتكون اللي هي اربعين | |
| 296 | |
| 00:40:53,220 --> 00:41:01,060 | |
| value خمسة هتكون نعم بيختلف | |
| 297 | |
| 00:41:01,060 --> 00:41:09,360 | |
| اتنين و اربعين في اربعة هي اتنين و اربعين هنشيل | |
| 298 | |
| 00:41:09,360 --> 00:41:12,480 | |
| اللي هو ال A و I و J | |
| 299 | |
| 00:41:16,170 --> 00:41:20,870 | |
| A في ال A اكتر | |
| 300 | |
| 00:41:20,870 --> 00:41:30,350 | |
| اه | |
| 301 | |
| 00:41:30,350 --> 00:41:34,370 | |
| هذا اه 42 طيب | |
| 302 | |
| 00:41:34,370 --> 00:41:43,310 | |
| ال A اكم 4.773 وال I 8.7178.7 | |
| 303 | |
| 00:41:46,270 --> 00:41:56,030 | |
| هذه سبعتاش؟ اه سبعتاش فاصلة اربعة تلاتين يعني | |
| 304 | |
| 00:41:56,030 --> 00:42:03,070 | |
| يعني هذا احسن خمسة فاصلة اتنين و خمسة فاصلة اتنين | |
| 305 | |
| 00:42:03,070 --> 00:42:09,410 | |
| ستة اللي هي value دلوقتي اه لاحظ في اشي غلط هنا في | |
| 306 | |
| 00:42:09,410 --> 00:42:09,830 | |
| ايه؟ | |
| 307 | |
| 00:42:21,640 --> 00:42:26,100 | |
| خليني أمسح هادول كلهم | |
| 308 | |
| 00:42:26,100 --> 00:42:35,480 | |
| اه | |
| 309 | |
| 00:42:35,480 --> 00:42:48,880 | |
| كان فيش غلط يعني | |
| 310 | |
| 00:42:48,880 --> 00:42:55,380 | |
| أقرب واحداللي هو ال section 42 في أربعة بيعطينا | |
| 311 | |
| 00:42:55,380 --> 00:42:58,240 | |
| realized factor of safety في ال factor of safety | |
| 312 | |
| 00:42:58,240 --> 00:43:03,340 | |
| الأساسي هو أربعة لكن الحقيقة طبق لل section | |
| 313 | |
| 00:43:03,340 --> 00:43:05,480 | |
| الحقيقي هو ده هو realized factor of safety اللي هو | |
| 314 | |
| 00:43:05,480 --> 00:43:11,080 | |
| أربعة point خمسة في ال design | |
| 315 | |
| 00:43:11,080 --> 00:43:17,200 | |
| هو في المثل أنا بحكيلك في ال designer المصمم | |
| 316 | |
| 00:43:21,080 --> 00:43:25,840 | |
| بنانة على كذا شغل على ال application مثلا اذا .. | |
| 317 | |
| 00:43:25,840 --> 00:43:31,420 | |
| مثلا في .. نحكي المحرك النفاذ بتاع الطيارة ال .. | |
| 318 | |
| 00:43:31,420 --> 00:43:34,360 | |
| ال .. نحكي الفرشاة بتاع المحرك، بدك factor of | |
| 319 | |
| 00:43:34,360 --> 00:43:37,640 | |
| safety عالي كتير، عندك حرارة عالية جدا و عندك اي | |
| 320 | |
| 00:43:37,640 --> 00:43:42,880 | |
| عطل فيها فقد للارواح حسب يعني، حسب ال application | |
| 321 | |
| 00:43:42,880 --> 00:43:48,460 | |
| ممكن نطلب أقل من واحد؟ إيش رأيك أنت؟ لأ يعني إذا | |
| 322 | |
| 00:43:48,460 --> 00:43:49,740 | |
| بديها طول قبل ما تسمع | |
| 323 | |
| 00:44:03,060 --> 00:44:08,900 | |
| ممكن تعمله انه انا شاسمه زي يصل load معين حيث ان | |
| 324 | |
| 00:44:08,900 --> 00:44:16,040 | |
| فيه كسر اه | |
| 325 | |
| 00:44:16,040 --> 00:44:17,500 | |
| طبعا في شغلتها | |
| 326 | |
| 00:44:21,540 --> 00:44:26,140 | |
| طيب فى سؤال تانى .. هيك و كده خلصنا و حذرا تاكوا | |
| 327 | |
| 00:44:26,140 --> 00:44:26,560 | |
| العافية | |