Question : Same Internal Axial Fone,which

E ←7-→ pcase is easier to fail :

① Small Cross sectional Area V.s. large Area ?

② Wood V-S . Steel ?

-

- -

-

psi PI Ksi = tooo psi

-I-

- -

=.

deformation at a point

--

-

= ==

-=-

-

IO

--

- -

-

-

-

-

IET

necksflown

slope - How hard the material is

O

-

-

-

¥,y

f- to kips

but ② Cut①1,O

'

lL

l,

I

\ !Cut①

← ← p diFN

Efron.

- Fn - P--o ⇒ Fn -- - P : - lo kipscompression

Qso == = - 3,183 kf¥= -3183 psi

x.

Cut @ ← P

E Ex --o : - fat 4p - p ⇒ ⇒ Eu -- 317=30 kipstension

Tais -- FAI -- ¥¥÷n. = 6.11519¥ = 6115 psi

ax,= did ⇒fcexidxnfdxfdx"

⇒ faxidx -- Lt - L =D

Fngbcx,K" -- BE ×

a

volume

a

"" El - - - - - atf Al"

←II Tip dip .D

W-- 8. VH1 f,f×) -- V - VIX)

Uhm -

- S? Ais> dg-f.ME .gjdg=b÷x3(x ) 8.bg÷×3⇒ ax, -- =

= }t×

⇒ an -- Eek.

④ dx -- dit- dx I S§xdx=E-2=74:p.

-

- gifted. -- EE'

Quiz-