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Date: | Wed, 3 Mar 1999 14:18:54 -0600 |
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Hi Ian,
Try Measurements Group, a division of Vishay. They are near Raleigh,
N.C.
Their phone number is (919)365-3800. They make Strain Gages as well as
Photoelastic resins that do exactly what you want to do. We have used their
Strain gages to make the x/y as well as Z expansion measurements on our
laminate materials for several years now. I have also been exposed to their
Photoelastic materials which cause fringing to occur on expansion/contraction.
I hope thgis helps,
Les
> From: Ian Boyton <[log in to unmask]>, on 3/3/99 11:28 AM:
> Hi All
>
> I want to carry out some stress measurements on pcb's to analyse the
> weakest areas at various assembly and test processes. I can use the
> latest technology in software to model the situations, but I'd much
> rather use a quicker method. What I had in mind was some kind of spray
> adhesive/lacquer which has brittle properties, thus under stress will
> crack and be visible under scopes or UV light. Can anyone help out with
> the name of supplier of this type of material and has anyone conducted
> similar tests.
>
> Thanks in advance
>
> Ian
>
>
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