登陆题目详情
单选题 在梁的正应力公式,为梁截面对于( )的惯性矩
学科：默认课程
时间：2025-12-16 08:04:10
相关题目
相关作业
题目1单选题
T形截面的梁两端受力偶矩作用,如图.若材料的抗压许用应力大于抗拉许用应力,则梁截面的位置应如何安放?( )<img src="https://tihai-oss-cloud.itihey.com/img/4607fa344eb53780d30f023893ec177d.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/bd748aeaf7c97cfd9de37d149c0c0047.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/7063112782fbddfa2aa4e367ce634637.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/b35fd4cac15c1cbc315b4ec742c81695.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/5bae579d348f7997329a7fa91107a948.png">
题目2单选题
在梁的正应力公式,为梁截面对于( )的惯性矩A. 形心主惯性轴B. 中性轴C. 形心轴D. 对称轴
题目3单选题
长4m的悬臂梁,自由端受集中力P作用.梁的材料为铸铁,许用拉应力<img src="https://tihai-oss-cloud.itihey.com/img/d5ad7cbec14421b8b9d3e4d68d999e22.webp">,许用压应力<img src="https://tihai-oss-cloud.itihey.com/img/2d46e292b1509c6342c77d7392325cec.webp">.梁的截面如图,h=200mm,截面形心离下缘的距离a=160mm,截面的形心主惯性矩<img src="https://tihai-oss-cloud.itihey.com/img/6ade8bda7091d0160670f9de7e301745.webp">.P的最大容许值为( ).<img src="https://tihai-oss-cloud.itihey.com/img/37feed498018c2e0e4ab408865b42ae3.png">A. 18kNB. 16kNC. 21kND. 24kN
题目4单选题
长4cm的简支梁,跨度中央受集中力P作用.梁采用No.45b工字钢(抗弯截面模量W=1500cm3),许用应力<img src="https://tihai-oss-cloud.itihey.com/img/73958da0b254633e3704cbcabddc5b1f.webp">.则P的最大容许值为( )A. 280kNB. 160kNC. 240kND. 200kN
题目5单选题
矩形截面的外伸梁受载情况如图.<img src="https://tihai-oss-cloud.itihey.com/img/56a55313ad2baa7a19f46b318a51ed7a.webp">,<img src="https://tihai-oss-cloud.itihey.com/img/4bed7dcb71b769c42a7f913dd3a015b2.webp">,<img src="https://tihai-oss-cloud.itihey.com/img/1820a8709b74830c1d34a81dfa4d5f21.webp">.截面的宽度和高度分别为<img src="https://tihai-oss-cloud.itihey.com/img/651ea89295fbfee4669d91ae408052cb.webp">,<img src="https://tihai-oss-cloud.itihey.com/img/6d500044c841cb66d5b5ecc0b01b9991.webp">.求梁内最大正应力的数值和位置.<img src="https://tihai-oss-cloud.itihey.com/img/8e88b71cd74448af6eb42c63ede29dad.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/4bb052de6bb2bf5f088b757180d9916c.webp">,位于截面B的上、下缘B. <img src="https://tihai-oss-cloud.itihey.com/img/2c904d7e493a4ff3204e762252516db3.webp">,位于截面B的上、下缘C. <img src="https://tihai-oss-cloud.itihey.com/img/96b069b0b51301a4dbc296be045bf5a4.webp">,位于截面C的上、下缘D. <img src="https://tihai-oss-cloud.itihey.com/img/2c904d7e493a4ff3204e762252516db3.webp">,位于截面C的上、下缘
下载 题海APP
拍照搜题更快捷
- 海量题库
- 无搜索限制
- 快捷拍照搜题
