score:10
Oh yes, Rosie the Riveter is certainly well recognized in North America these days. This image is iconic:
and, although frequently associated with Rosie the Riveter, I'm surprised to learn in my research on these linked pages that she is not in fact a representation of Rosie the Riveter.
You ask about Rosie the Riveter as an expression. It isn't an expression at all but a cultural icon. It was also a hit song from 1942. The "We Can Do It!" expression in this image is associated today with Rosie. In a Google search for "We can do it" all the top hits are either to Rosie the Riveter directly, or indirectly via the poster. So "We Can Do It!" is an expression that has probably become bound to Rosie the Riveter.
Rosie the Riveter, and this image and expression in particular, are widely recognized in the US precisely because of the cultural products that come from that country containing Rosie's image/mythology. In remote northern Canada we're well acquainted with her, too, and I've seen the poster/notecard/fridge magnet in various urban kitchens throughout the country. However, as other users mentioned, it is possible or likely that young people in their teens and twenties don't recognize Rosie the Riveter nor associate the expression with her or with WWII.
Upvote:2
"We can do it" in this context means "we can do a man's job" (riveting, heavy lifting, etc.). A few women even enlisted in the Women's Army Corps (WACs) or the naval WAVES, thereby paving the way for today's women to be part of the modern army.
Upvote:8
Before WWII, significant numbers of women worked in light industry, such as clothing manufacture, but very few in heavy industry, such as airplane production. As large numbers of working aged men were drafted or enlisted, there was a shortage of labor in plant, and in particular, war industry.
Women were recruited to "man" the assembly lines. This was a dramatic cultural shift. The image of Rosie the Riveter was coined to both recognize those women contributing to the war effort and to rally support.
She appeared in numerous posters and a film was made as well.
The iconic image of the flexed muscle is still widely seen, currently on refrigerator magnets, as a symbol of female power. However many younger folks in the U.S. have no idea who Rosie was or why her role was significant.
Ironically, many women who worked in factories were displaced as men returned from war. The fact that women had successfully done jobs that previously were viewed only as "man's work" would eventually help women as they sought equal opportunity in the workforce, albeit decades later.
See this article.
SUPPLEMENT: Below is a poster with a female war effort worker who is usually identified as Rosie.