Задача №5.24
Условие
Кронштейн, нагруженный вертикальной силой P=600 Н, прикреплен к стене двумя болтами. Определить затяжку болтов, необходимую для укрепления кронштейна на стене. Коэффициент трения между кронштейном и стеной f=0,3. Для большей осторожности расчет произвести в предположении, что затянут только верхний болт и что болты поставлены с зазором и не должны работать на срез. Дано b/a>f. Указание. Затяжкой называется усилие, действующее вдоль оси болта. Полная затяжка верхнего болта состоит из двух частей: первая устраняет возможность отрыва кронштейна и опрокидывания его вокруг нижнего болта, вторая обеспечивает то нормальное давление верхней части кронштейна на стену, которое вызывает необходимую силу трения.Решение
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1.1
1.2
1.3
1.4
1.5
2.1
2.2
2.3
2.4
2.5
2.6
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3.1
3.2
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3.4
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4.1
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5.1
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9.1
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10.1
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12.1
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19.1
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22.1
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23.1
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24.1
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25.1
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26.1
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27.1
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27.44
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27.47
27.48
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27.55
27.58
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28.1
28.2
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29.1
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30.1
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31.1
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31.35
32.1
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32.48
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32.50
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32.53
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32.84
32.85
32.86
32.87
32.88
32.89
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32.91
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32.100
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32.102
32.103
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32.107
33.1
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34.1
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35.1
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36.1
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37.1
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38.1
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39.1
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40.1
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41.1
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42.1
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43.1
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44.1
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45.3
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46.1
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47.1
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48.1
48.5
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48.44
48.48
48.49
49.1
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53.5
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54.1
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55.2
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56.3
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56.9