Strength of Materials

STBENqTTI Of' MATERIALS - --- .,1 :

f.

aL

Betrding stress:

1. Bending stress varies linearly

2.

Bending stress acts perpendicular to plane of Cross section

3.

Bending stress Zero atN.A, Maximum at extreme fibres

4.

Bending Stress Formula (Ste'ture {-

d2y

dx2

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: x(/mrn>

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g,\.Lo,/ 5fscdo' LtnFto-rcr{lanl

d2gr

dx" dx'

17.

dx' dx

-5

*

tltox',' \crw'

gtrcn i'n €n€\ (gv ."elttirnr-e

fo

br.g >dIDg= *Vg B,nr^: }$ ho.$9.o'c'l tre- 8.vn: j!:

Supgott YQncb'on:

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VA

'.

--

-

^ (Qnrv€ '- = -fi^rQ- Ynttr.. delle.pJtrn otcUrvl @

tr\llt

sfrf,

54.

Bulk modulus

55.

PoiSson's

(K) :

oD Pel'Lorel'*.e-cl ttur. a*'1ff15-1;:t o,rl.,

Notmal stress Volumetric Strain

ratio (1/m):

"'l''Lriii"@!r'

Lateral strain Linear strain (Longitudinal strain)

.

tl

56.

Modulus of elasticity (E)

57.

Modulus of rigidity

:

(C) :

.'

58.

Factor

Linear Stress Linear Strain Shear stress Shear strain

:

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