Recent content by Astroboy

Hi bronx68 The test lab I worked at used instrumented drop testing for measuring impact energy of various materials and structures. The load cells would give a load-time curve which was integrated for energy. A typical rigid impact say, with no penetration or some other complication would...

Hi Bronx68 I used to build and do this kind of testing using instrumented impact load cells etc. For steel and delrin an impact time of 3-5 milliseconds would be reasonable depending on how dented the delrin gets.

floworks now known as cosmos flow

what kind of values do you get? do they make sense?

are you considering hot dip vs electroplated or electroless tin? Typical parts are electroplated using essentially pure tin such as the process described by ASTM 545. If you want a uniform bright shiny finish consider electrodeposited tin that is deposited using organic brightners or is...

Hi Keep in mind that bolt torque is 90% friction and 10% elastic energy in bolt preload (stretch). If you need to evaluate the preload to any reasonable degree of accuracy then you must know the friction and coeficients very accurately as well. This is really tough to do in many applications...

See if you can get a copy of ASME Y14.5M Also MIL-D-1000 This can be expensive but is the drafting standard bible

Has it been welded? You might be seeing a heat effected zone near a weld.

Hi I looked in the world wide guide to irons and steels and found nothing close. It isn't a foriegn designation of any kind.

Hi Some reference on the use and mounting of Tcs are: Omega,http://www.omega.com/ and stuff at cooling zone, http://www.coolingzone.com/Content/Library/index.html check out articles by Tony Kordyban and for a real thermal hoot get his book "hot air rises and heat sinks or everything you...

Hi The heat xfer by conduction to the drum should overwhelm the xfer by radiation unless the guns are really hot, 1300F and very close to the foil, say, 5 inches. What are your parameters? Without air your contact with the drum should be quite good with a thin flexible foil. In general it...