材料力學一第五版.孫訓方一課后習題答案

第二章軸向拉伸和壓縮

HYPERLINK"/lixuesun/caili/ch21.htm"\1"2T#2-1"2-1HYPERLINK

〃cos,cumt.edu/lixuesun/caili/ch21.htm〃\1

〃2-2#2-2〃2-2HYPERLINK

“/lixuesun/caili/ch21.htm"\1"2-3#2-3”2-3HYPERLINK

“/lixuesun/caili/ch21.htm"\1〃2-4#2-4〃2-4HYPERLINK

〃cos,cumt.edu/1ixuesun/cai1i/ch21.htm〃\1

〃2-5#2-5〃2-5HYPERLINK

〃/lixuesu

n/caili/ch21.htm〃\1〃2-6#2-6〃2-6HYPERLINK

〃/lixuesu

n/caili/ch21.htm〃\1〃2-7#2-7〃2-7HYPERLINK

〃/lixuesu

n/caili/ch21.htm/z\1〃2-8#2-8〃2-8HYPERLINK

"cos.cumt.edu/lixuesun/caili/ch21.htm，z\1〃2-9#2-9〃2-9HYPERLINK

〃cos.cumt.edu/1ixuesun/cai1i/ch22.htm〃下頁

2-1試求圖示各桿IT和2-2橫截面上的軸力，并作軸力圖。

(a)解:INCLUDEPICTURE"/lixuesun/caili/ch21/image002.gif"\*

MERGEFORMATINET；INCLUDEPICTURE

；(b)解:INCLUDEPICTURE"/lixuesun/caili/ch21/image004.gif”

INET

；INCLUDEPICTUREzzcos.cumt.edu/1ixuesun/caili/ch21/image006.gifz，\*

MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/cai1i/ch21/image008.gif"INET

(b)解:INCLUDEPICTURE"/lixuesun/caili/ch21/image006.gif"\*

MERGEFORMATINET；INCLUDEPICTURE

；^cos.cumt.edu/lixuesun/caili/ch21/image008.gifz，\*MERGEFORMATINET

hiiilllllll

I腳慢!I

(c)解：INCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image014.gif"INET

INCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/cai1i/ch2l/image016.gif〃\*

MERGEFORMATINET

o(d)解:

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image018.gif"\*

MERGEFORMATINET

(d)解：

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image018.gif〃\*

MERGEFORMATINET

HYPERLINK

/zcos.cumt.edu/lixuesun/caili/ch21.htm/z\1返回

2-2試求圖示等直桿橫截面IT,2-2和3-3上的軸力，并作軸力圖。若橫截面面積

INCLUDEPICTURE

,試求各橫截“cos.cumt.edu/1ixuesun/caili/ch21/image026.gif〃\*

MERGEFORMATINET

面上的應力。

解：INCLUDEPICTURE?/cos.cumt.edu/lixuesun/caili/ch21/image028.gifz，\*

MERGEFORMATINET

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/cai1i/ch21/image030.gif"\*

MERGEFORMATINET

INCLUDEPICTURE

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/caili/ch21/image032.gif"\*

MERGEFORMATINET〃cos.cumt.edu/1ixuesun/caili/ch21/image034.gif〃\*

MERGEFORMATINET

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/cai1i/ch21/image036.gif"\*

MERGEFORMATINET

INCLUDEPICTURE"cos.cumt.edu/lixuesun/caili/ch21/image038.gif"\*

MERGEFORMATINET

INCLUDEPICTURE〃cos.cumt.edu/lixuesun/caili/ch21/image040.gif"\*

MERGEFORMATINETHYPERLINK

〃cos.cumt.edu/lix

uesun/caili/ch21.htm，/\1"title#title〃返回

2-3試求圖示階梯狀直桿橫截面IT,2-2和3-3上的軸力，

并作軸力圖。若橫截面面積INCLUDEPICTURE

,INCLUDEPICTURE，zcos.cumt.edu/1ixuesun/caili/ch21/image042.gifzz\*

MERGEFORMATINET

,INCLUDEPICTURE^cos.cumt.edu/1ixuesun/caili/ch21/image044.gifz/\*

MERGEFORMATINET

,并求各橫截面“cos.cumt.edu/1ixuesun/caili/ch21/image046.gif"\*

MERGEFORMATINET

上的應力。

解：INCLUDEPICTURE，zcos.cumt.edu/lixuesun/caili/ch21/image050.gif，z\*

MERGEFORMATINET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image052.gif"\*

MERGEFORMATINET

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/caili/ch21/image054.gif〃\*

MERGEFORMATINETINCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image056.gif"

INETINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/caili/ch21/image058.gif"\*MERGEFORMATINET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image060.gif"\*

MERGEFORMATINET

HYPERLINK"/lixuesun/caili/ch21.htnT\1z，title#titlez，返回

2-4圖示一-混合屋架結構的計算簡圖。屋架的上弦用鋼筋混凝土制成。下面的拉桿和中

間豎向撐桿用角鋼構成，其截面均為兩個75nlmX8mm的等邊角鋼。已知屋面承受集度為

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/cai1i/ch21/image064.gif"\*

MERGEFORMATINET的豎直均布荷

載。試求拉桿AE和EG橫截面上的應力。

解：INCLUDEPICTURE"/lixuesun/caili/ch21/image066.gif"\*

MERGEFORMATINET

二INCLUDEPICTUREz，cos.cumt.edu/1ixuesun/caiH/ch21/image068.gifz，\*

MERGEFORMATINET

〃/1ixuesun/cai1i/ch21/image070.gif"INET

1）求內力

INCLUDEPICTURE取1-1分離體INCLUDE?ICTURE

〃cos.cumt.edu/lixuesun/caili/ch21/image074.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch2l/image076.gif"\*

MERGEFORMATINET得INCLUDEPICTURE

z，cos.cumt.edu/lixuesun/caili/ch21/image078.gifz，INET（拉）取節

點E為分離體

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/caili/ch21/image080.gif"\*

MERGEFORMATINET"cos.cumt.edu/1ixuesun/cai1i/ch21/image082.gif"\*

MERGEFORMATINET，INCLUDEPICTURE

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/caili/ch21/image084.gif"\*

MERGEFORMATINET

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/cai1i/ch2l/image086.gif〃\*

MERGEFORMATINET故INCLUDEPICTURE

z，cos.cumt.edu/lixuesun/caili/ch21/image088.gif?，INET（拉）2）

求應力

75X8等邊角鋼的面積A=11.5cm2

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch2l/image090.gif〃\*

MERGEFORMATINET（拉）

（拉）

||||||

INCLUDEPICTURE〃cos.cumt.edu/lixuesun/caili/ch21/image092.gif"\*

MERGEFORMATINETHYPERLINK"cos.cumt.edu/lixuesun/caili/ch21.htm"\1

返回

2-5(2-6)圖示拉桿承受軸向拉力INCLUDEPICTURE

^cos.cumt.edu/lixuesun/caili/ch21/image094.gifz，\*MERGEFORMATINET,桿的橫截

面面積INCLUDEPICTURE"/lixuesun/caili/ch21/image096.gif"\*

MERGEFORMATINET。如以INCLUDEPICTURE

z/cos.cumt.edu/lixuesun/caili/ch21/image098.gif?，\*MERGEFORMATINET表示斜截面

與橫截

面的夾角，試求當INCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/cai1i/ch21/image100.gif"\*MERGEFORMATINET

INCLUDEPICTURE

,30INCLUDEPICTURE"/lixuesun/caili/ch21/imagel02.gif"\*

MERGEFORMATINET

,45INCLUDEPICTURE"/lixuesun/caili/ch21/imagel04.gif"\*

MERGEFORMATINET

,60INCLUDEPICTURE"/lixuesun/caili/ch21/imagcl05.gif"\*

MERGEFORMATINET

,90INCLUDEPICTUREcos.cumt.edu/1ixuesun/caili/ch21/imagel06.gif〃\*

MERGEFORMATINET

z/cos.cumt.edu/lixuesun/caili/ch21/imagel07.gifzzINET時各斜截

面上的正應力和切應力，并

用圖表示其方向。

解：

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/imagelll.gif"\*

MERGEFORMATINET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image113.gif"\*

MERGEFORMATINETINCLUDEPICTURE

〃cos?cumt.edu/1ixuesun/caili/ch21/imagel09.gif"\*

MERGEFORMATINETINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/caili/ch21/imagel17.gif"\*MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

z，cos.cumt.edu/1ixuesun/cai1i/ch21/image119.gif〃\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/cai1i/ch21/imagel15.gif"\*

MERGEFORMATINETINCLUDEPICTURE

z，cos.cumt.edu/1ixuesun/cai1i/ch21/image123.gif〃\*MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai11/ch21/image125.gif〃\*MERGEFORMATINET

“cos.cumt.edu/1ixuesun/cai1i/ch21/imagel21.gif〃\*

MERGEFORMATINETINCLUDEPICTURE

z，cos.cumt.edu/1ixuesun/cai1i/ch21/image129.gif"\*MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/cai1i/ch21/image131.gifz，\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/cai1i/ch21/image127.gif〃\*

MERGEFORMATINETINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image135.gif"\*MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/caili/ch21/imagel37.gifz，\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/caili/ch21/image133.gif,\*

MERGEFORMATINETINCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/cai1i/ch21/image141.gif〃\*MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/caili/ch21/image143.gif"\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/caiIi/ch21/imagel39.gif,\*

MERGEFORMATINETHYPERLINK"cos.cumt.edu/lixuesun/caili/ch21.htm，/\1

“title枇itle〃返回

INCLUDEPICTURE

〃cos./1ixuesun/cai1i/ch21/image109.gif"INET

INCLUDEPICTURE〃cos?cumt.edu/1ixuesun/cai1i/ch21/image117.gif〃\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/caili/ch21/image119.gif"\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/cai1i/ch21/imagel15.gif〃INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image123.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/caili/ch21/image125.gif"\*MERGEFORMATINET

“/1ixuesun/cai1i/ch21/image121.gif〃INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image129.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

"cos.cumt.edu/1ixuesun/cai1i/ch21/image131.gif〃\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/cai1i/ch21/image127.gif〃INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caiIi/ch21/imagel35.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/cai1i/ch21/imagel37.gif"\*MERGEFORMATINET

〃/1ixuesun/caili/ch21/image133.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image141.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/cai1i/ch21/image143.gif"\*MERGEFORMATINET

〃cos?cumt.edu/1ixuesun/cai1i/ch21/image139.gif〃INETHYPERLINK

z，cos.cumt.edu/lixuesun/caili/ch21.htm，/\1z，title#title，z返回

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/caili/ch21/image117.gif〃\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image119.gif"\*MERGEFORMATINET

“cos.cumt.edu/1ixuesun/cai1i/ch21/imagel15.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image123.gif〃\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/caili/ch21/image125.gif〃\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/caili/ch21/image121.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image129.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image131.gif"\*MERGEFORMATINET

“/1ixuesun/cai1i/ch21/imagel27.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image135.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image137.gif"INET

〃cos.cumt.edu/1ixuesun/cai1i/ch21/imagel33.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image141.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/caili/ch21/imagel43.gif〃\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/caiIi/ch21/imagel39.gif'INETHYPERLINK

/zcos.cumt.edu/lixuesun/caili/ch21.htmz，\1返回

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/imagel17.gif"\*

MERGEFORMATINET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image119.gif"\*

MERGEFORMATINETINCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/cai1i/ch21/imagel15.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image123.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image125.gif"\*MERGEFORMATINET

“cos.cumt.edu/1ixuesun/cai1i/ch21/imagel21.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image129.gif〃\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image131.gif\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/caili/ch21/image127.gif"INET

INCLUDEPICTURE〃cos?cumt.edu/1ixuesun/cai1i/ch21/image135.gif〃\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/caili/ch21/image137.gif"\*MERGEFORMATINET

“cos.cumt.edu/1ixuesun/cai1i/ch21/imagel33.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image141.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image143.gif"INET

〃cos.cumt.edu/1ixuesun/cai1i/ch21/imagel39.gif"INETHYPERLINK

'/cos.cumt.edu/lixuesun/caili/ch21.htmz/\1z，title#title，"返回

INCLUDEPICTURE

“/1ixuesun/caili/ch21/imagel15.gif〃INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image123.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image125.gif"\*MERGEFORMATINET

“cos.cumt.edu/1ixuesun/caili/ch21/imagel21.gif"INET

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/caili/ch21/image129.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/cai1i/ch21/image131.gif〃\*MERGEFORMATINET

“cos.cumt.edu/1ixuesun/cai1i/ch21/imagel27.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image135.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

z，cos.cumt.edu/1ixuesun/cai1i/ch21/image137.gif"INET

〃cos./1ixuesun/cai1i/ch21/imagel33.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image141.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/imagel43.gif〃\*MERGEFORMATINET

"cos.cumt.edu/1ixuesun/caiIi/ch21/imagel39.gif'INETHYPERLINK

zzcos.cumt.edu/lixuesun/caili/ch21.htmz，\1z，title#title，z返回

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image123.gif"\*

MERGEFORMATINETINCLUDEPICTURE

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image125.gif"\*

MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/caili/ch21/image121.gif〃INET

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/cai1i/ch21/image129.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image131.gif"\*MERGEFORMATINET

〃cos./1ixuesun/cai1i/ch21/imagel27.gif"INET

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/cai1i/ch21/image135.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image137.gif"\*MERGEFORMATINET

“cos.cumt.edu/1ixuesun/cai1i/ch21/imagel33.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caiIi/ch21/imagel41.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image143.gif〃\*MERGEFORMATINET

"cos.cumt.edu/lixuesun/caili/ch21/imagel39.gif"INETHYPERLINK

“/lixuesun/caili/ch21.htnT\1，ztitle#titlez，返回

INCLUDEPICTURE〃cos.cumt.edu/lixuesun/caili/ch21/imagel23.gif"\*

MERGEFORMATINETINCLUDEPICTURE

INCLUDEPICTURE"cos.cumt.edu/lixuesun/caili/ch21/imagel25.gif"\*

MERGEFORMATINET

〃cos./lixuesun/caili/ch21/imagel21.gif"INET

INCLUDEPICTURE〃cos.cumt.edu/lixuesun/caili/ch21/imagel29.gif〃\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/lixuesun/caili/ch21/imagel31.gif"INET

〃cos.cumt.edu/1ixuesun/cai1i/ch21/imagel27.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image135.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/caili/ch21/imagel37.gif"\*MERGEFORMATINET

〃cos.cumt.edu/lixuesun/cai1i/ch21/imagel33.gif〃INET

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/cai1i/ch21/image141.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image143.gif"\*MERGEFORMATINET

〃cos.cumt.edu/lixuesun/caili/ch21/imagel39.gif"INETHYPERLINK

，zcos.cumt.edu/lixuesun/caili/ch21.htmz/\1返回

INCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/imagel21.gif"INET

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/cai1i/ch21/image129.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image131.gif\*MERGEFORMATINET

〃cos./1ixuesun/cai1i/ch21/image127.gif"INET

INCLUDEPICTURE〃cos?cumt.edu/lixuesun/cai1i/ch21/image135.gif〃\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image137.gif"\*MERGEFORMATINET

“cos.cumt.edu/1ixuesun/cai1i/ch21/imagel33.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image141.gif〃\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image143.gif〃\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/caili/ch21/image139.gif"INETHYPERL1NK

，zcos.cumt.edu/lixuesun/caili/ch21.htm/z\1z，title#title，z返回

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image129.gif"\*

MERGEFORMATINETINCLUDEPICTURE

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image131.gif"\*

MERGEFORMATINET

“/1ixuesun/cai1i/ch21/imagel27.gif〃INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image135.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/caili/ch21/image137.gif〃\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/cai1i/ch21/image133.gif〃INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caiIi/ch21/imagel41.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/cai1i/ch21/imagel43.gif"\*MERGEFORMATINET

〃/1ixuesun/caili/ch21/image139.gif"INETHYPERLINK

z，cos.cumt.edu/lixuesun/caili/ch21.htm，z\1返回

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image129.gif"\*

MERGEFORMATINETINCLUDEPICTURE

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/caili/ch21/image131.gif〃\*

MERGEFORMATINET

〃cos./1ixuesun/cai1i/ch21/image127.gif"INET

INCLUDEPICTURE〃cos?cumt.edu/1ixuesun/cai1i/ch21/image135.gif〃\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image137.gif"\*MERGEFORMATINET

“cos.cumt.edu/1ixuesun/cai1i/ch21/imagel33.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image141.gif〃\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image143.gif〃\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/caili/ch21/image139.gif"INETHYPERL1NK

，zcos.cumt.edu/lixuesun/caili/ch21.htm/z\1z，title#title，z返回

INCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/caiIi/ch21/imagel27.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image135.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/caili/ch21/image137.gif"\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/cai1i/ch21/imagel33.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image141.gif"\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

〃cos.cumt.edu/lixuesun/cai11/ch21/imagel43.gifz，\*MERGEFORMATINET

"cos.cumt.edu/1ixuesun/caiIi/ch21/imagel39.gif"INETHYPERLINK

z/cos.cumt.edu/lixuesun/caili/ch21.htm/z\1返回

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image135.gif"\*

MERGEFORMATINETINCLUDEPICTURE

INCLUDEPICTURE〃cos.cumt.edu/lixuesun/caili/ch21/imagel37.gif"\*

MERGEFORMATINET

〃cos.cumt.edu/lixuesun/cai1i/ch21/imagel33.gif"INET

INCLUDEPICTURE〃cos?cumt.edu/1ixuesun/caili/ch21/image141.gif〃\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/lixuesun/cai1i/ch21/imagel43.gif"\*MERGEFORMATINET

"cos.cumt.edu/lixuesun/caili/ch21/imagel39.gif"INETHYPERLINK

“/lixuesun/caili/ch21.htnT\1，ztitle#titlez，返回

INCLUDEPICTURE〃cos.cumt.edu/lixuesun/caili/ch21/imagel35.gif"\*

MERGEFORMATINETINCLUDEPICTURE

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/imagel37.gif"\*

MERGEFORMATINET

〃cos./1ixuesun/cai1i/ch21/imagel33.gif"INET

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/caili/ch21/image141.gif〃\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/caili/ch21/imagel43.gif〃\*MERGEFORMATINET

"cos.cumt.edu/lixuesun/caili/ch21/imagel39.gif"INETHYPERLINK

，zcos.cumt.edu/lixuesun/caili/ch21.htm，?\1z，title#title，z返回

INCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/cai1i/ch21/imagel33.gif〃INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image141.gif〃\*

MERGEFORMATINET

INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/caili/ch21/imagel43.gif"\*MERGEFORMATINET

，zcos.cumt.edu/lixuesun/caili/ch21/imagel39.gif'INETHYPERLINK

z，cos.cumt.edu/lixuesun/caili/ch21.htm，z\1返回

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image141.gif"\*

MERGEFORMATINET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image143.gif"\*

MERGEFORMATINETINCLUDEPICTURE

zzcos.cumt.edu/lixuesun/caili/ch21/imagel39.gif"INETHYPERLINK

，zcos.cumt.edu/lixuesun/caili/ch21.htm/z\1z，title#title，z返回

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image141.gif"\*

MERGEFORMATINET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/caili/ch21/image143.gif"\*

MERGEFORMATINETINCLUDEPICTURE

"cos.cumt.edu/lixuesun/caili/ch21/imagel39.gif"INETHYPERLINK

“/lixuesun/caili/ch21.htnT\1，ztitle#titlez，返回

INCLUDEPICTURE

zzcos.cumt.edu/lixuesun/caili/ch21/imagel39.gif"INETHYPERLINK

“/lixuesun/caili/ch21.htm"\1z，title#title，z返回HYPERLINK

“/lixuesun/caili/ch2LhtnT\1zztitle#title，z返回HYPERLINK

z，cos.cumt.edu/lixuesun/caili/ch21.htmz，\1返回

2-6(2-8)?木樁柱受力如圖所示。柱的橫截面為邊長200mm的正方形，材料可認為符

合胡克定律,其彈性模量E=10GPa。如不計柱的自重，試求:

(1)作軸力圖；

(2)各段柱橫截面上的應力；

(3)各段柱的縱向線應變；

(4)柱的總變形。

INCLUDEPICTURE

〃cos.cumt.edu/lixuesun/caili/ch21/image145.gif,\*

MERGEFORMATINET

解:INCLUDEPICTURE"/lixuesun/caili/ch21/imagcl47.gif"\*

MERGEFORMATINET(壓)

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/caili/ch21/image149.gif"\*

MERGEFORMATINET(壓)

INCLUDEPICTUREINCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/caili/ch21/image151.gif"\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/cai1i/ch21/imagel53.gif"INET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image155.gif"\*

MERGEFORMATINETINCLUDEPICTUREz，cos.cumt.edu/1ixuesun/cai1i/ch21/imagel57.gif"

INETINCLUDEPICTURE

“cos.cumt.edu/1ixuesun/caili/ch21/image159.gif"\*MERGEFORMATINET

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/caili/ch21/image161.gif〃\*

MERGEFORMATINETINCLUDEPICTUREz，cos.cumt.edu/1ixuesun/cai1i/ch21/imagel63.gif"

INET

HYPERLINKz，cos.cumt.edu/lixuesun/caili/ch21.htm^\1返回

2-7(2-9)一根直徑INCLUDEPICTURE

z，cos.cumt.edu/lixuesun/caili/ch21/imagel65.gifzz\*MERGEFORMATINET、長

INCLUDEPICTURE"cos.cumt.edu/lixuesun/caili/ch21/image167.gif"\*

MERGEFORMATINET的圓截面桿，承受軸向拉力

,其伸長為INCLUDEPICTUREINCLUDEPICTURE

“cos.cumt.edu/lixuesun/cai1i/ch21/image169.gif〃\*MERGEFORMATINET

，zcos.cumt.edu/lixuesun/caili/ch21/imagel71.gifz，INET。試求桿

橫截面上的應力與材料的彈性模量Eo

解：INCLUDEPICTURE/zcos.cumt.edu/lixuesun/caili/ch21/imagel73.gifz，\*

MERGEFORMATINET

INCLUDEPICTURE"cos.cumt.edu/lixuesun/caili/ch21/image175.gif"\*

MERGEFORMATINET

2-8(2-11)受軸向拉力F作用的箱形薄壁桿如圖所示。已知該桿材料的彈性常數為E,

INCLUDEPICTURE"cos.cumt.edu/lixuesun/caili/ch21/image177.gif"\*

MERGEFORMATINET,試求C與D兩點間的距離改變量INCLUDEPICTURE

“/lixuesun/caili/ch21/imagel79.gif"\*MERGEFORMATINET。

解：INCLUDEPICTUREz/cos.cumt.edu/lixuesun/caili/ch21/imagel81.gifz，\*

MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/cai1i/ch21/imagel83.gif〃INET

INCLUDEPICTURE

INCLUDEPICTURE

〃/1ixuesun/cai1i/ch21/imagel85.gif"\*

MERGEFORMATINET

橫截面上的線應變相同

INCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/caili/ch21/image187.gif〃\*

MERGEFORMATINET

因此INCLUDEPICTURE"/lixuesun/caili/ch21/imagel89.gif"\*

MERGEFORMATINET

INCLUDEPICTURE

〃cos./lixuesun/caili/ch21/image191.gif"\*

MERGEFORMATINETINCLUDEPICTURE

〃cos./lixuesun/caili/ch21/ch21.hl.gif"\*

MERGEFORMATINET

HYPERLINK"/lixuesun/caili/ch21.htnT\1返回

2-9（2-12）圖示結構中，AB為水平放置的剛性桿，桿1,2,3材料相同，其彈性模量

E=210GPa,已知INCLUDEPICTURE"/lixuesun/caili/ch21/imagel93.gif”

INET,

,INCLUDEPICTUREINCLUDEPICTURE

z，cos.cumt.edu/1ixuesun/cai1i/ch21/image195.gif〃INET

,INCLUDEPICTURE"/lixuesun/caili/ch21/imagel97.gif"\*

MERGEFORMATINET

o試求C點的水平位移和鉛垂位移。

“cos.cumt.edu/1ixuesun/cai1i/ch21/image199.gif"\*MERGEFORMATINET

INCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/cai1i/ch21/image201.gif〃\*

MERGEFORMATINET解：（1）受力圖（a）

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/caili/ch21/image203.gif"\*

MERGEFORMATINET

“/lixuesun/caili/ch21/image205.gif"INET,

INCLUDEPICTURE。

（2）變形協調圖（b）

因INCLUDEPICTURE，zcos.cumt.edu/1ixuesun/caili/ch21/image209.gifz，\*

MERGEFORMATINET,故INCLUDEPICTURE

“cos.cumt.edu/1ixuesun/cai1i/ch21/image211.gif"INET

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/caili/ch21/image213.gif"\*

MERGEFORMATINET

:INCLUDEPICTUREINCLUDEPICTURE

〃cos.cumt.edu/1ixuesun/cai1i/ch21/image217.gif"\*MERGEFORMATINET

〃cos.cumt.edu/1ixuesun/cai1i/ch21/image219.gif〃INET（向下）

（向下）INCLUDEPICTUREz，cos.cumt.edu/lixuesun/caili/ch21/image221.gif,z\*

MERGEFORMATINET

為保證INCLUDEPICTUREz，cos.cumt.edu/lixuesun/caili/ch21/image223.gifz，\*

MERGEFORMATINET,點A移至INCLUDEPICTURE

,由圖中幾何關系知；〃cos.cumt.edu/1ixuesun/caiIi/ch21/image225.gif"\*

MERGEFORMATINET

INCLUDEPICTURE"cos.cumt.edu/1ixuesun/cai1i/ch21/image227.gif"\*

MERGEFORMATINET

INCLUDEPICTURE〃cos.cumt.edu/1ixuesun/caili/ch21/image229.gif"\*

MERGEFORMATINET

HYPERLINK"/lixuesun/caili/ch21.htnT\1返回

第三章扭轉

HYPERLINK"cos.cumt.edu/1ixuesun/caili/ch3.htm"\1〃3T#3T〃3-1HYPERLINK

“cos.cumt.edu/1ixuesun/cai1i/ch3.htm〃\1

〃3-2#3-2〃3-2HYPERLINK

“/lixuesun/caili/ch3.htnT\1〃3-3#3-3〃3-3HYPERLINK

“/lixuesun/caili/ch3.htnT\1〃3-4#3-4〃3-4HYPERLINK

〃cos,cumt.edu/1ixuesun/cai1i/ch3.htm〃\1

〃3-5#3-5〃3-5HYPERLINK

，zcos.cumt.edu/1ixuesun/caili/ch3.htm，z\1"3-6#3-6"3-6HYPERLINK

z，cos.cumt.edu/1ixuesun/caili/ch3.htmz/\1〃3-7#3-7〃3-7HYPERLINK

“cos.cumt.edu/1ixuesun/cai1i/ch3.htm〃\1

3-8#3-8〃3-8HYPERLINK

,zcos.cumt.edu/lixuesun/caili/ch3.htm/，\1〃3-9#3-9〃3-9

HYPERLINK"/lixuesun/caili/ch3.htnT\1〃3-10#3-10〃3-10HYPERLINK

〃/1ixuesun/cai1i/ch3.htm〃\1

〃3T1#3T1〃3-11HYPERLINK

〃cos.cumt.edu/1ixuesun/caili/ch3.htm，z\1

〃3T2#3T2〃3-12

3-1一傳動軸作勻速轉動，轉速