# RE: Fatigue and Bowling Pins

• To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
• Subject: RE: Fatigue and Bowling Pins
• From: "Caldwell, Stan" <scaldwell(--nospam--at)halff.com>
• Date: Wed, 9 Jan 2002 16:14:23 -0600
Title: RE: Fatigue and Bowling Pins

Perhaps, y'all are making this way too complicated!  During those weeks when the bowling pins are taken out of service, they presumably receive no abuse whatsoever.  Let's say that we have two bowling pins named Ken and Jim who are identical twins.  They were manufactured side-by-side on the same day, at the same factory, out of the same material.  Jim was put to work in a "bad" establishment, where he labored every day without any vacation.  After 20 years (7300 days) of faithful service, he was struck by a bowling ball for the umpteen millionth time, cracked in half, and headed for the landfill.  Ken, on the other hand, was put to work (on the same day) in a "good" establishment.  However, he spent one week every month on a shelf in a closet.  Like Jim, he survived exactly 7300 days of actual service.  However, since that service was spread out, Ken beat him to the landfill by almost 6 years!

Please note that the higher mathematics displayed above did not require any partial differential equations, integrals, or fast fourier transforms.

Stan Caldwell, P.E.
Smiling in Dallas

-----Original Message-----
From: Ken Peoples [mailto:kspeoples(--nospam--at)lvta.net]
Sent: Wednesday, January 09, 2002 3:48 PM
To: seaint(--nospam--at)seaint.org
Subject: Re: Fatigue and Bowling Pins

If this is so, I would assume that the material that the pin is made of has
some sort of healing property that would fuse the cracks.  I can't wait to
hear the thoughts on this one!
Ken

Kenneth S. Peoples, P. E.
Lehigh Valley Technical Associates
Northampton, PA 18067-9039
Phone: (610) 262-6345
Fax: (610) 262-8188
e-mail: kpeoples(--nospam--at)lvta.net

----- Original Message -----
From: "Balmer James" <James.Balmer(--nospam--at)rsandh.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Wednesday, January 09, 2002 1:49 PM
Subject: Fatigue and Bowling Pins

> I recently heard that bowling pins are routinely taken out of service for
a
> few weeks to extend their service life.  I confirmed this by calling a few
> local alleys.  For a pin left in continuous service, service life is X
> weeks.  For a pin that is routinely removed from service, service life is
> C*X weeks.  Where C is greater than one and the service life ignores the
> "rest" periods.
>
> Is this a old wives tale created by a bowling pin salesman or is there a
> reasonable explanation for this?
>
> James
>
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