西南大学[0727]建筑力学18春在线作业资料
07271、点的速度合成定理的适用条件是（）
牵连运动只能是平动
牵连运动为平动和转动
牵连运动只能是平面平动
牵连运动不限
参考答案：牵连运动不限；
2、刚体受三力作用而处于平衡状态，则此三力的作用线（）
必汇交于一点
必互相平行
必皆为零
必位于同一平面
参考答案：必位于同一平面；
3、作用在一个刚体上的两个力如果满足等值反向，则该二力可能是（）<br
作用力和反作用力或一对平衡力
一对平衡力或一个力偶
一对平衡力或一个力和一个力偶
作用力与反作用力或一个力偶
参考答案：一对平衡力或一个力偶；
4、平面内一非平衡共点力系和一非平衡共点力偶系最后可能合成的情况是（）<br
一合力偶
一合力
相平衡
无法进一步合成
5、工程中常见的组合变形是（）</strong
斜弯曲及拉压与弯曲的组合
弯曲与扭转的组合
拉压及弯曲与扭转的组合
ABC
6、关于断裂的强度理论是（）</strong
第一和第四
第三和第四
第一和第二
第二和第三
7、下列结论中哪个是正确的？</strong
内力是应力的代数和
应力是内力的平均值
应力是内力的集度
内力必大于应力
8、关于屈服的强度理论是（）</strong
第一和第二
第三和第四
第一和第四
第二和第三
9、以下说法错误的是（）</strong
构件材料的极限应力由计算可得
塑性材料以屈服极限为极限应力
脆性材料以强度极限作为极限应力
材料的破坏形式主要有2种
10、一个应力状态有几个主平面（）</strong
两个
最多不超过三个
无限多个
一般情况下有三个，特殊情况下有无限多个
11、对于一个微分单元体，下列结论中错误的是（）</strong
正应力最大的面上剪应力必为零
剪应力最大的面上正应力为零
正应力最大的面与剪应力最大的面相交成45度
正应力最大的面与正应力最小的面必相互垂直
12、最大剪应力所在的截面和主平面成的角度是（）<pclass="MsoNormal"style="margin:0cm0cm0pt18pt;text-indent:-18pt;line-height:16.5pt;"
30
60
45
90
13、对于等截面梁，以下结论错误的是（）</strong
最大正应力必出现在弯矩值最大的截面上
最大剪应力必出现在剪力最大的截面上
最大剪应力的方向与最大剪力的方向一致
最大拉应力与最大压应力在数值上相等
14、对于矩形截面的梁，以下结论错误的是（）</strong
出现最大正应力的点上，剪应力为零
出现最大剪应力的点上，正应力为零
最大正应力的点和最大剪应力的点不一定在同一截面上
梁上不可能出现这样的截面，即该截面上的最大正应力和最大剪应力均为零
15、在梁的正应力公式σ＝My/Iz中，Iz为梁截面对于（）的惯性矩</strong
形心轴
对称轴
中性轴
形心主对称轴
16、下面说法正确的是</strong
挠度向下为正
挠度向上为负
转角以顺时针为正
ABC
17、提高梁的弯曲强度的措施有（）
采用合理截面
合理安排梁的受力情况
采用变截面梁或等强度梁
ABC
18、矩形截面最大剪应力是平均剪应力的()倍
1
1.5
2
1.33
19、在中性轴上正应力为（）
正
负
不确定
0
20、梁的支座一般可简化为（）
固定端
固定铰支座
可动铰支座
ABC
21、在无载荷的梁端下列说法错误的是（）
Q大于0时M图斜率为正
Q大于0时M图斜率为负
Q等于0时M图斜率为0
Q小于0时M图斜率为负
22、一实心圆轴受扭，当其直径减少到原来的一半时，则圆轴的单位扭转角为原来的几倍？
2
4
8
16
23、关于矩形截面和圆截面杆扭转的区别以下正确的是（）
变形后圆截面杆的横截面还是平面
平面假设可以用于矩形截面杆扭转分析
矩形截面杆变形后横截面还是平面
平面假设对任何截面杆都适用
24、脆性材料的破坏断口与轴线成的角度为（）
30度
45度
60度
90度
25、以下说法错误的是（）
扭转问题是个超静定问题
扭转角沿轴长的变化率称为单位扭转角
有些轴不仅考虑强度条件，还考虑刚度条件
精密机械的轴的许用扭转角为1度每米
26、研究纯剪切要从以下来考虑（）
静力平衡
变形几何关系
无忧答案网 www.ap5u.com
物理关系
ABC
27、关于圆轴扭转的平面假设正确的是（）
横截面变形后仍为平面且形状和大小不变
相临两截面间的距离不变
变形后半径还是为直线
ABC
28、不属于扭转研究范围的是（）
汽车方向盘操纵杆
船舶推进轴
车床的光杆
发动机活塞
29、以下可以作为纯剪切来研究的是（）
梁
圆柱
薄壁圆筒
厚壁圆筒
30、一圆截面直杆，两端承受拉力作用。若将其直径增加一倍，则杆的抗拉刚度将是原来的几倍？<br
8
6
4
2
31、两杆的长度和横截面面积均相同，其中一根为钢杆，另一根为铝杆，受相同的拉力作用。下列结论正确的是（）<br
铝杆的应力和钢杆相同，而变形大于钢杆
铝杆的应力和钢杆相同，而变形小于钢杆
铝杆的应力和变形都大于钢杆
铝杆的应力和变形都小于钢杆
32、轴向拉伸的应力公式在什么条件下不适用
杆件不是等截面直杆
杆件各横截面的内力不仅有轴力，还有弯矩
杆件各横截面上的轴力不相同
作用于杆件的每一个外力作用线不全与杆件轴线相重合
33、剪应力公式τ＝Q/A的应用条件是（）
平面假设
剪应力在剪切面上均匀分布假设
剪切面积很小
无正应力的面上
34、脆性材料的破坏断口与轴线成的角度为（）
30度
45度
60度
90度
35、直径为d的圆截面拉伸试件，其标距是（）<br
试件两端面之间的距离
试件中段等截面部分的长度
在试件中段的等截面部分中选取的“工作段”的长度，其值为5d或10d
在试件中段的等截面部分中选取的“工作段”的长度，其值应大于10d
36、以下不属于截面法的步骤的是（）
取要计算的部分及其设想截面
用截面的内力来代替两部分的作用力
建立静力平衡方程式并求解内力
考虑外力并建立力平衡方程式
37、以下说法不正确的是（）
外力按其作用方式可分为体积力和表面力
按是否随时间变化将载荷分为静载荷和动载荷
动载荷可分为交变载荷和冲击载荷
在动静载荷中材料的机械性能一样
38、材料力学研究的研究对象是（）<br
大变形
厚板
杆系，简单板，壳
复杂杆系
39、最大剪应力所在的截面和主平面成的角度是（）
30
60
45
90
40、在中性轴上正应力为（）
正
负
不确定
零
41、下列结论哪些是正确的：（1）剪应力互等定理是根据平衡条件推倒出来的（2）剪应力互等定理是在考虑平衡、几何、物理三个方面因素基础上导出的（3）剪应力互等定理只适用于受扭杆件（4）剪应力互等定理适用于各种受力杆件。
（1）（3）
（1）（4）
（2）（3）
（2）（4）
42、两根直径相同长度及材料不同的圆轴，在相同扭矩作用下，其最大剪应力和单位扭转角之间的关系是（）
最大剪应力相同，单位扭转角不同
最大剪应力相同，单位扭转角相同
最大剪应力不同，单位扭转角不同
最大剪应力不同，单位扭转角相同
43、矩形截面杆件在自由扭转时，其最大剪应力发生在（）
矩形短边中点
矩形长边中点
矩形角点
形心处
44、铸铁试件在扭转时，若发生破坏，其破坏截面是（）
沿横截面
沿与杆轴线成45度的斜截面
沿纵截面
沿与杆轴线成60度的斜截面
45、按作用方式的不同将梁上载荷分为（）
集中载荷
集中力偶
分布载荷
ABC
46、不属于材料力学的基本假设的有（）
A.连续性
B.均匀性
C.各向同性
D.各向异性
47、什么是应力？
48、什么是强度？
49、强度理论
50、什么是杆件？
51、广义胡克定律
52、什么是刚度？
53、<imgsrc="/resourcefile/uploadFiles/file/questionImgs/201608291472438520691098799.jpg"title="201608291472438520691098799.jpg"alt="d.jpg"/>
54、图示压杆由直径d=60mm的圆钢制成，其中惯性半径r=15mm，长度系度μ＝0.7，E＝200Gpa，λp=100，λs=60，细长杆临界应力公式<imgwidth="58"height="28"src="data:image/png;base64,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"/>，中长杆临界应力公式<imgwidth="132"height="22"src="data:image/png;base64,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"/>，求压杆临界力
55、铸铁梁的荷载及截面尺寸如图示，材料的许可拉应力＝40MPa，许可压应力＝60MPa，已知：<em>P=3kN,</em>a=1m，<em>Iz</em>＝765×10<sup>-8</sup>m<sup>4</sup>，<em>y1=52mm,y2=88mm</em><em>。</em>不考虑弯曲切应力，试校核梁的强度。<imgwidth="214"height="76"alt="37"src="data:image/png;base64,/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDAAoHBwgHBgoICAgLCgoLDhgQDg0NDh0VFhEYIx8lJCIfIiEmKzcvJik0KSEiMEExNDk7Pj4+JS5ESUM8SDc9Pjv/wAALCABMANYBAREA/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQAAAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSo0NTY3ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKjpKWmp6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl5ufo6erx8vP09fb3+Pn6/9oACAEBAAA/APZqKKKKKKKqapqMGkaZc6jdb/ItozJJsXJwOuBVK28T6bMl4Zmks2sfLNwlyuwoHGUJ6jBrYoooooorL1DXrSx0e/1Jd1wlgWWVIx825eqjPfmjSdcTVLq+szbS29zYMizI5BHzLuGGHB4PI7VqUUUUUUUUUUUUUUUVh+LdOvNX0hNOtYvMjnuIhdfvfLIhDBnwfUgY/Gq3iTTLHTvCGrC2twnnR75GOXZ24AJJyTjA+ldJS0UUUUVxv9kz63p+o2MZh8htcZ7pZSR5kSsrFRj1wB9M11drZ2tjEYrS3igjJLFY0Cgk9Tx3qeiiiiiiiiiiiiiiiisLxlPFH4ZvYXkVZJoWEak4LkckD145rYt7mG6jLwSrIqsyFlORuBwR+BBFS0UUUUyaVIIXmkJCRqWYgEnA5PA61zfhXUrSS81K3juYpXuL6WeDym3bo9sZ3HHTlgOa6eiiiiiiqEWt6XPfvYRX8DXSMUaIP8wYDJX645x6VfpskiRRtJIwREBZmJwAB1Ncv4Y8Sz6xreqR3DCO3WKK4s42jKMITvG5sgckqD6AEVag8caBK4E159jWQFoJLtTClwo6tGzYDD/PSrH/AAl3hv8A6D2nf+BKf41DL448KwttfX7AH2mB/lTP+E/8Jf8AQwWX/fylXx34Vc4TXbNj6K+ak/4TPw4emrQfr/hS/wDCZeHf+grD+v8AhXKfEnVvD/iDwbdWcOpI92hEtsERid6npwOMgkfjWtovinwnoOhWOmR6om22hWPKwyfMQOT93qTk/jV3/hP/AAvnH9qD/vxJ/wDE0f8ACfeGB/zE+oz/AKiT/wCJqRfHHhx1Vkv2YMcAi3l5P/fNOPjTQAQDeSAk4/49Zev/AHzQ3jPQV63M5+lnMf8A2Sof+E80AnAkvj/3Drj/AOIrjfAkvh7wtqmu3IF4BeXX+jY0+4JEI+YD7nqxH/Aa7R/HOhxuUdr9WBwQdNuOv/fFKnjbRZM7Pt7Y640244/8cpreN9KxmK21WfnB8vTJzg/98Uh8bWAP/IN1s/8AcKn/APiaP+E3sP8AoGa3/wCCqf8A+Jo/4Tew/wCgZrf/AIKp/wD4mltfG2m3d2LZbXUYyZBEWms3jCuRlVO7ByR047iud8N6bqlzrWn3l3Z3aIbm6vbuO6iEaQyv8sZTuzBTjnIwTXolQXtnb6hZTWd1H5kE6FJEyRuB6jI5rN1S10nS3uPENxA3nx2v2clXbLpn5YwucEljgcZyawtJ0280HUdGbWbhrqKS3a0gDKu2ykbDBM4ywIUKGPOVH96uz8uP+4v5Uvlp/cX8qPLT+4v5UBVHRQPoKdRVHWtVh0PRrvVLgFo7WIyFR1bHQD6nA/GqtjFr7S2tzd3lsEcbri1WH7mV4CPnJwepPX2rYooooorgY9Y1SHSF1+PVLi4W51XyLWzlRMTQtMIwo4B3bQzg56deK76iiiiiuJ8QyWsPi6DVU055k0pVbUZlkwFDKRGdmfnK5Jz1APGeldtRRXHX2ijxFrjSfatQttNsZ/MmkN06rNKvRY1JwqqeS3qMDuab9h0/WlfULm6vYtCtfnV5b2QLdEciTluEUjKnueemM3LLRBq5a8uZdRgs3XFvbtezK5H/AD0b5sgnsvYdeeB0qKERUXOFGBk5P506iiiq2o6fa6rp1xp97H5tvcIY5EzjINQadpIsG3tfXl2wTYpuJd21fQAADPTk88da0KKKKKZLGs0TxPna6lTtYg4PoRyKzbHw1pOnNbtb2pzartt/MkaTyRjGF3E449K1aKKKKq6lDHNYyCR7lVQbz9mdlkOOcDbyfp3rhLnwx/bN65ktr+K8voEA8+5lK2cCsSrud2GlJJITJAP0JPQaLoN2Zmvb+81GNCFSG0e9diAP45CDgu3cDgDj1rpaKQgMCCAQeCDWZo9+dWt7sTWqRC3u5bcJ1BCNgH8eDWpRUc88VtbyXE8ixxRKXd2OAoHJJqlpet2urSzxQRzo0CozCWMplXBKkZ9QOnX1FaNFVNU1GPStPkvZUZ0jKgqnXlgv9at0UVR1LU009raERmW4u5PLhiBxuIBZiT2AUEk0miamdZ0e21HyDALhd4jLBsDPHI9Rz+NX6Ko6dqBvp7+IxhPsdz5AIOd3yK2fb736VeoorMsvEFhqGotY2xldwjSLJ5ZEbqrBSVboeTitOis67vpode0+yTb5VzHMz5HOV2Yx/wB9GtGiiivMrzx7L4U/tOCLQL243anPi6ddlsuW6l+enfgV21vrEwtUM1lc3EojDNJbQ/u3J/uZY5H41KurzN/zB9QH1WP/AOLqnq0g1jS7jTrnSNUWK4TYxj8sMPod9RaYraXcXlwthrVxJeyLJKZzE2CFC8YYYGAOK0f7Xm/6A2of98x//F1neJfEN5pXh+41GC1NvJAN4F3s2vjnZw+cnoMZOexrmrnxbq3iLwVeSXfhK/sgVQh2kUK53rwN2G59cVasfHWu33ioaXc+HptKiUFkScgyXRH8KMSE9zgk4HFdaNRvSf8AkC3Q+skX/wAXTjf3gz/xKLk4/wCmkXPH+9VC/tE1pY21Dw/OxtmYxAzoCcjBHyvyCOCDwansVl0vTYbPT9DaGGFQscPnp8o9M5NSG/1TPGisf+3lK5bxB4q8U6brttbaVoo1BpkzNY7gWhA6P5i8KG54bP3eKzJ/FHi/S49XuNN8GGWR73dMTcLN5R8qPjanLcc5HrXX6Pq2qXOk28/2I3pkQM06zIgY9xt7YPGDyMc81b/tDV8n/iRHHb/SkqKS91qaNom0HarqwYi9UEcduOtZWjaPquiyxzx2ctwwtY7QRzXsYWNEzjhY+vPODz1rbW81ogE6RAD6fbP/ALCsvxNquu2ehz3EFoltOgzCY5vOLv8Awps2fNk8YGPqKxvD2p+K9U8QaLN4k0a304iG4ClZcPJ8q5Pl8leg7969Boooqjp2mLYR3SNJ5wubmSc7lAxvOdvvircUUcMaxxIsaKMKqjAH4U+iiimPFHLt8yNX2NuXcM4PqPeq+p6fHqlhJZzOyJIVJKdeGDf0q0VVsbgDg5GR0NLRRRRSVUstMgsLm9uIS5e+mE0u45AYKq8egwoq3jFLRRRRVWfTre41C1vpAxmtA4iIbAG8AHI79BVqiiiiiiiiiiiiiiiiiiiiiiiiiiiiv//Z"/><imgwidth="117"height="105"align="left"src="data:image/png;base64,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"hspace="12"v:shapes="_x0000_s1027"/>
56、图示圆轴A端固定，其许用应力［σ］=50MPa，轴长l</em>=1m，直径d=120mm；B端固连一圆轮，其直径D=1m，轮缘上作用铅垂切向力F=6kN.试按最大切应力理论校核该圆轴的强度。<imgsrc="data:image/png;base64,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"/>
57、图示外伸梁，受均布载荷作用，已知：q=10kN/m，a=4m，试计算梁的支座反力。<imgwidth="252"height="111"src="data:image/png;base64,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58、承受均布荷载作用的矩形截面木梁AB如图所示，已知<em>l</em>=4m，b=140mm，h=210mm，q=1kN/m，弯曲时木材的容许正应力[<imgwidth="14"height="14"src="data:image/png;base64,R0lGODlhDgAOAHcAMSH+GlNvZnR3YXJlOiBNaWNyb3NvZnQgT2ZmaWNlACH5BAEAAAAALAIAAwAIAAcAhAAAAAAAAAMAAA0KCAAECg0LCgQAAAMGCw0IBAsGAwAABAoLDQoEAAADCAsLDQQIDQ0LCwgDAAECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwECAwUjIDAIQRkQhXEAyAokygIAzArLb+MgwTMzMUhElyLMhCUjIAQAOw=="/>]=10Mpa，试校核该梁的强度。<imgwidth="336"height="114"alt="26"src="data:image/png;base64,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"/>
59、图示水平悬臂梁AB，受铅垂集中力F和集度为q的铅垂均布载荷作用，且F=2qa，若不计梁重，试求固定端A处的约束反力。
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