[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fBFIsND09h4EW6oD1Mtivi0kmjwSSEyfNv48AgEWIIRQ":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2024-05-05 15:08:24",141481749,[8,9,10,11],"-1KN,1KN","-3KN,-1KN","1KN,-1KN","3KN,1KN",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},18,"fb88b757e04abdff4dfc5493d967d633","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F47813fb8e42c12538de60b2c10f63af6.png","材料力学","1430ec71ba404e438616394adf718578","单元测试","‎等直杆受力如图,BC、CD段的内力扭矩分别为 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa8e0e8718c39891f90f5870c33d7dd25.jpg\">",[21,32,41,50,59,68,77,86,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],141481742,[25,26,27,28],"将轮B与轮D对调,然后再将轮B与轮C对调","将轮C与轮D对调","将轮B与轮D对调","将轮B与轮C对调","图示等截面圆轴上装有四个轮子,如何合理安排 . \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3ea947da3ee0dc8f5838ca89b4afa55c.png\">","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],141481743,[36,37,38,39],"切应力互等定理:不成立;剪切胡克定律: 成立","切应力互等定理:成立;剪切胡克定律: 不成立","切应力互等定理:不成立;剪切胡克定律: 不成立","切应力互等定理:成立;剪切胡克定律: 成立","圆轴扭转时满足平衡条件,但切应力超过比例极限,有下列四种结论 . ‎",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],141481744,[45,46,47,48],""平面假设"给出了圆轴扭转时的变形规律",""平面假设"是建立切应力互等定理的基础",""平面假设"使物理方程得到简化",""平面假设"给出了横截面上内力与应力的关系\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd3a888ad15a4651bb0e4a69ff494e8cc.webp\">","圆轴扭转切应力公式\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F025d4d17a2922daafc009e2f97800510.webp\"> 时,"平面假设"的作用是",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],141481745,[54,55,56,57],"扭转切应力越小,强度越大;单位长度的转角越小,扭转刚度越小","扭转切应力越小,强度越小;单位长度的转角越小,扭转刚度越小","扭转切应力越小,强度越大;单位长度的转角越小,扭转刚度越大","扭转切应力越小,强度越小;单位长度的转角越小,扭转刚度越大","关于扭转强度和刚度,表述正确的是",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],141481746,[63,64,65,66],"相同","与材料相关,与截面尺寸无关","不同","与材料无关,与截面尺寸相关","已知二轴长度及所受外力矩完全相同. 若二轴材料不同、 截面尺寸不同, 其扭矩图",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],141481747,[72,73,74,75],"增大轴的直径","改为优质合金钢","减少轴的长度","用铸铁代替","一圆轴用普通碳素钢制成, 受扭后发现单位长度扭转角超过了许用值, 为提高刚度拟采用适当措施, 在下面四种答案中, 正确答案是",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],141481748,[81,82,83,84],"1","1\u002F2","1\u002F4","2","空心圆轴长为L,两端作用一对外力偶Me发生扭转变形.若此轴的长度和外力偶同时增大1倍,则单位长度的扭转角为原来的 倍",{"answer":87,"createTime":5,"id":6,"options":88,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],141481750,[93,94,95,96],"-2Me,-3Me","3Me,2Me","2Me,3Me","-3Me,-2Me","‌等直杆受力如图,AB、BC段的扭矩分别为 \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9a2ead5be729070b7fc2ef21285d5a63.jpg\">",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],141481751,[102,103,104,105],"变大","不变","可能变化","不确定","‎根据平面假设,圆截面轴扭转变形后,横截面间的距离、形状和大小都"]