For 3D modeling I am looking for nice (free) 3D jt files to enrich my material flow model, e.g. a truck brake system or machines, people (male, female, walking, sitting, standing etc.) trees, houses etc. Does anybody know a webpage where I could get those things?
You can search the web for "3d cad models download free" or alike to get several web sites that provide thousands of standard parts in common CAD formats.
Tecnomatix products, RobotExpert and Process Simulate, support conversion of all common CAD formats to a .cojt, which is the format these products use.
When I need 3D models I always look up to the folling websites:
These platforms offer a lot of designs in several formats.
Maybe you have the opportunity to utilize other neutral formats, such as STP, IGES, STL as well.