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1 of 3
Internal Force
1. External & Internal Force
Goal
1/3
External & Internal Force
: Force applied from outsideExternal force
Internal Force
:
: Force derived in inside
F F
N
FF
N
Virtual cut
a pair of same intensity and opposite direction forces
N = F 2/3
How much is Internal Force?
FC
FB
CBA
x
y
FA
FA FB FC+ = 0+ FA = FB FC+
NAB NBC
FA + NAB = 0 NAB
FB FC
+=
NBC + FC = 0 NBC = FC
3/3

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Internal Force

  • 1. Internal Force 1. External & Internal Force Goal 1/3
  • 2. External & Internal Force : Force applied from outsideExternal force Internal Force : : Force derived in inside F F N FF N Virtual cut a pair of same intensity and opposite direction forces N = F 2/3
  • 3. How much is Internal Force? FC FB CBA x y FA FA FB FC+ = 0+ FA = FB FC+ NAB NBC FA + NAB = 0 NAB FB FC += NBC + FC = 0 NBC = FC 3/3

Editor's Notes

  1. 内力の説明@@@@@@@@@ 大きさは外力の大きさと等しい
  2. 仮想切断面を図示する