Join our MCAD Central community forums, the largest resource for MCAD (Mechanical Computer-Aided Design) professionals, including files, forums, jobs, articles, calendar, and more.
Guys, I've been using Mechanica for a long time, and while it is a very powerful tool, you need to use it with care if you want to analyse impact simulation with it. The tutorials and techniques that you see posted on the PTC web site is only good for rough appoximation, and provides some insight into how your design is going to cope with impact. For example, it will give an indication on the relative stresses at the impact point compared to other areas of the body. To try and determine failure based on the absolute stress levels is, IMHO, not going to be accurate because of the all the simplifications e.g. material linearity, strain linearity, absence of stress waves. I think even in LS-Dyna, stress waves are not taken into account. So yeah, you can use it to impress your friends and colleagues, but if you're going to present your results at peer-review meetings with other analysts, exercise caution!
I have an idea - please send all those requests by "PM" chanell
I am not against idea to share materials but each time I received an e-mail that there is new thread in topic I have a hope it brings something new to the subject
Oki agree with thecriticismabout using this forum to share material. Anyway I asked directly the tutorial (i think using good manners...) withoutgiving a new contribution becauseI don't knowif my problem is completely compliant with the current subject. I am newbie in the field of dynamics at all.What i can't understand is the meaning ofMechanica function impulse(x)that i would like to use in a dynamic time simulation to assess the effect of an impact (is it correct this procedure? Is there a better way?).
I know that the impulse should be given in N*s and it shouldmodel the energy(momentum variation) due tothe impact. But i don't know where it is possible to input the value in N*s...
Surely there's something wrong in myreasoning... may someone help me?
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
