[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fCno2k2LYP8EUK0yzu2fJzQ2AMYJgZtbGE1dD2nm91x4":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-05-16 05:00:57",12325493,[8,9,10,11],"2τ","4τ","8τ","16τ",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},10,"4ee540adc032a75dc5dcf0c86940c7ed","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe5c914be1d9da18678a7c630cebc87e2.jpg","材料力学","f8ca9b71710e4ba6ac2d3c32afd1bc1c","第三章 章节测试","直径为d的实心圆轴,两端受扭转力矩作用,轴内最大剪应力为τ,若轴的直径改为D\u002F2,则轴内最大剪应力变为",[21,32,41,44,53,62,71,80,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],12325491,[25,26,27,28],"不到1倍,1倍以上","1倍以上,不到1倍","1倍以上,1倍以上","不到1倍,不到1倍","一内外径之比d\u002FD=0.8的空心圆轴,若外径D固定不变,壁厚增加1倍,则该轴的抗扭强度和抗扭刚度分别提高 . 章节","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],12325492,[36,37,38,39],"形状尺寸不变,直径仍为直线","形状尺寸改变,直径仍为直线","形状尺寸不变,直径不为直线","形状尺寸改变,直径不为直线","根据圆轴扭转的平面假设,可以认为圆轴扭转时其横截面",{"answer":42,"createTime":5,"id":6,"options":43,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":30,"type":31},[],12325494,[48,49,50,51],"最大剪应力\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb4d9f62563490478d87aa2799f518941.png\">相同、单位长度扭转角θ不同","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb4d9f62563490478d87aa2799f518941.png\">不同,θ相同","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb4d9f62563490478d87aa2799f518941.png\">和θ都不同","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb4d9f62563490478d87aa2799f518941.png\">和θ都相同","图示等截面圆轴中,左段为钢右段为铝.两端受扭转力矩后,左、右两段 .\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F1d10d265d94ce803f74164b929ce3290.jpg\">",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],12325495,[57,58,59,60],"杆的长度","扭矩","材料性质","截面几何性质","单位长度的扭转角θ与( )无关",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],12325496,[66,67,68,69],"τ","ατ","0","(1-α4) τ","空心圆轴,其内外径之比为α,扭转时该轴内的最大切应力为τ,这时横截面上内边缘处的切应力为( )",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],12325497,[75,76,77,78],"T=GIpγ\u002Fr,φ=lr\u002Fγ","T=lγ\u002F(GIp),φ=lγ\u002Fr","T=GIpγ\u002Fr,φ=lγ\u002Fr","T=GIpγ\u002Fr,φ=γr\u002Fl","实心圆轴如图所示,已知扭转刚度GIp和γ角,则轴的扭矩及相对扭转角分别为:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ffc45422eaf124e8f487cb6ecf705e026.png\">",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],12325498,[84,85,86,87],"将C轮和D轮对调","将B轮和D轮对调","将B轮和C轮对调","将B轮和D轮对调,然后将B轮和C轮对调","现有四个皮带轮安装在等截面圆轴上,如何合理安排各轮的位置:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F3c1be08c42cd2c430a5f3598521d645e.png\">",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],12325499,[93,94,95,96],"τ1=τ2,φ1=φ2","τ1=τ2,φ1≠φ2","τ1≠τ2,φ1=φ2","τ1≠τ2,φ1≠φ2","两根扭转轴的长度和直径相等,材料不同,在相同扭矩条件下,其最大切应力和相对扭转角的关系",{"answer":99,"createTime":5,"id":100,"options":101,"question":105,"source":30,"type":31},[],12325500,[102,103,104],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fad62a4b4ae4025739b143b4a93165fa7.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fe9ed82989db1418c306f6bdb820c9adc.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F02789af3b99990dcabee6239719df846.png\">","一支粉笔受扭距如图所示,其断口形式应为:\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6c4fbe3be2a5e1e2d3f859c7a1271bf8.png\">"]