Title

The Variance in Palmgren-Miner Damage Due to Random Vibration

Date

1962

Index Abstract

Not Available

Photo Quality

Undetermined

Report Number

AFOSR 1999

Creator

Crandall, Stephen H.

Mark, William D.

Khabbaz, Ghassan R.

Corporate Author

Massachusetts Institute of Technology

Laboratory

Air Force Office of Scientific Research

Extent

28

Identifier

AD0271151

Access Rights

Notice(s)

Distribution Classification

1

Contract

AF 49(638)-564

DoD Project

None Given

DoD Task

None Given

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

None

Distribution Conflict

No

Abstract

A random stress-history which is proportional to the stationary response of a single-degree-offreedom vibratory system to wide-band Gaussian excitation is assigned a damage based on the Palmgren-Miner hypothesis and an idealized S-N law. The damage accumulated in time T is a random variable because of the randomness in the number of cycles and the randomness in the amplitudes of the cycles. The mean and variance of the damage are obtained by two procedures: one which accounts for both sources of randomness and one which neglects the randomness in the number of cycles contained in the interval. The two procedures give the same asymptotic result when the bandwidth shrinks to zero. The Theoretical results are illustrated by curves computed for a particular example.

Report Availability

Not available via Contrails

Date Issued

1962-01

Index In

DTIC

Type

report