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Pertemuan ke-4:

POROS (SHAFT)

Pokok Bahasan Hari Ini

Kekuatan poros akibat lenturan/momen lengkung

Kekuatan poros akibat lenturan dan puntiran Daya pada poros

Shafts Subjected to Bending Moment Only

Solid Shaft

Hollow Shaft

Contoh-1

Contoh-1

Contoh-1

Shafts Subjected to Combined Twisting Moment and Bending Moment

Various theories have been suggested to account for the elastic failure of the materials when they are subjected to various types of combined stresses.

The following two theories are important from the subject point of view : 1. Maximum shear stress theory or Guest's theory. It is

used for ductile materials such as mild steel. 2. Maximum normal stress theory or Rankine’s theory. It is

used for brittle materials such as cast iron.

Maximum Shear Stress (2)

Maximum Shear Stress (3)

Maximum Shear Stress (4)

Maximum Normal Stress

Maximum Normal Stress

Hollow Shaft

Contoh-2

Contoh-2

Contoh-2

Contoh-3

Contoh-3 (2)

Contoh-3 (3)

Contoh-4

Contoh-4 (2)

Contoh-4 (3)

Contoh-5

Contoh-5 (2)

Contoh-5 (3)

Contoh-6

Contoh-6

Contoh-6

Contoh-6

Contoh-6

Contoh-6

Contoh-6

Contoh-6

Contoh-6

Pokok Bahasan Minggu Depan

Bantalan (Bearing) Macam-macam Bantalan Material dan umur Bantalan Kekuatan Bantalan terhadap gaya gesek dan

beban

Referensi

A Textbook of Machine Design by R.S. Khurmi and J.K.Gupta (2005) – (Chapter 14)

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