6.1. νͼʾ֪l=4 m b / h =2/3q=10 kN/m[?]=10 MPa
ȷijߴ硣
⣺(1) ͼ
ͼ֪
ql2/2 M x
q h l b (-) Mmax(2) 㿹ϵ
ql2? 223hbhh33W??? 6692(3) ǿȼ
?max?MmaxWql229ql1?23??3?[?]h2h99ql239?10?103?42?h?3??416mm
2[?]2?10?106 b?277mmʵñİ
6.2. 20aָ֧кͼʾ[?]=160 MPaغɡ
⣺(1) ͼ
ͼ֪
M 2P/3 (+) (-) 2P/3 x
2m 2m P A C D B No20a
2m P Mmax?(2) ÿϵ
2P 3W?237?10?6m3
(3) ǿȼ
2PM2?max?max?3??P?[?] WW3W3W[?]3?237?10?6?160?106?P???56.88kN22ȡغ
[P]?57kN
ĵ
ʵñİ
6.3. ͼʾԲ첿ϵᡣͼӦ
⣺(1) ͼ
ͼ֪ΣսCB (2) ΣսϵӦֵ
C棺
M 1.34kNm 400 800 200 300 5kN A C 60 D 3kN B 3kN E 45 (+) x
(-) 0.9kNm ?CmaxMCMC32?1.34?103????63.2MPa 33WC?dC??0.0632B棺
ĵ
材料力学习的题目解答(弯曲应力) - 百度文库
6.1.νͼʾ֪l=4mb/h=2/3q=10kN/m[?]=10MPaȷijߴ硣⣺(1)ͼͼ֪ql2/2Mxqhlb(-)Mmax(2)㿹ϵql2?223hbhh33W?
Ƽȣ
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