如图 3-12 所示, 拉杆用四个铆钉固定在格板上, 已知拉力[tex=3.714x1.0]mbYTyxXkfRnxjzp7/c1W7PHP6k0nyrtKBX04z1QhG0g=[/tex], 拉杆的案度 [tex=3.929x1.0]cae/f+weJAkilL+jhfA0gDjrJRp4sEDFwy/+Pnl7VMk=[/tex], 厚度[tex=3.929x1.0]twOcNwtuY59AnxdUz59VsxiU+dkT234/NtcGTScece8=[/tex], 铆钉直径 [tex=4.0x1.0]HWbXC28eq33KSfcaq8RnN+kuGTXUFxm8YUMLCUm1uyU=[/tex]; 材料的许用切应力 [tex=5.357x1.357]G0WVEpmkXOaCLIuFKm+WuybU47yx5x6dLS7KR6eFP/8=[/tex], 许用挤压应力[tex=6.357x1.357]g7bsu9jPT94R5AsNOGiRbX8fXW7hCb88ddd0W3In8TO23iGlMZLa3kCH32SDrfw4YjmRkW6b1lOVXLdVci3yKQ==[/tex], 许用拉应力[tex=5.5x1.357]2L55wb6Ie42hvgcbATi2GWJ89xebjM4iM9bOwcSYJU8=[/tex]。试校核铆钉与拉杆的强度。[img=565x199]17cf3f7f7dcf19e.png[/img]
举一反三
- set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为? A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}
- >>>x= [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9]>>>print(x.sort()) 语句运行结果正确的是( )。 A: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] B: [10, 6, 0, 1, 7, 4, 3, 2, 8, 5, 9] C: [10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0] D: ['2', '4', '0', '6', '10', '7', '8', '3', '9', '1', '5']
- 带肩杆件如图 3-15 所示, 已知材料的许用切应力[tex=5.357x1.357]G0WVEpmkXOaCLIuFKm+WuybU47yx5x6dLS7KR6eFP/8=[/tex], 许用挤压应力 [tex=6.357x1.357]g7bsu9jPT94R5AsNOGiRbX8fXW7hCb88ddd0W3In8TND7FV4V4mFuDCUQrtM5YlyIexoBmm7lUOHhjK5k4x8ag==[/tex], 许用拉应力[tex=5.5x1.357]dB49rXRJzPj8zBIde78HKGb65fJruqBF9oWyU5xRLo0=[/tex]。试确定许可载荷。[img=251x269]17cf404211224b5.png[/img]
- 假设“☆”是一种新的运算,若3☆2=3×4,6☆3=6×7×8,x☆4=840(x>0),那么x等于: A: 2 B: 3 C: 4 D: 5 E: 6 F: 7 G: 8 H: 9
- 【计算题】5 ×8= 6×4= 7×7= 9×5= 2×3= 9 ×2= 8×9= 7×8= 5×5= 4×3= 5+8= 6 ×6= 3×7= 4×8= 9×3= 1 ×2= 9×9= 6×8= 8×0= 4×7=