Would you pronounce D when you say“Hard work” in american accent

Yes. We pronounce the d. 

Yes you should pronounce the d. har work sounds very odd

hard work but the d is softer

Yes. It's the r sounds that can vary by regional accent.

Native US speaker from northern latitudes. I’ll usually say “hard work” with a soft-sounding D. A fully realized English D has a stop with the tip of the tongue pressed against the palate, followed by a plosive release to make the “duh” sound. Pronouncing ‘W’ interferes with that movement, so you have to choose between… Voicing “hard work” as “hard. work”(awkward), or Saying “har(d) work,” with the ‘D’ stop but hardly any plosive following. If I need to speak very distinctly, I’ll say what sounds like “har dwerk.”

If you are familiar with liason on French, this situation is fairly similar. In the General American dialect, we "drop" the /t/ and /d/ sounds at the end of words except if followed by certain sounds — mainly vowels and semi-vowels (/w/ and /j/). So, you pronounce them in hard work and hot oil but not in hard left or hot potato. In my own experience, I also say them if followed by some fricative consonants, turning them into affricatives. So, hat shop would sound like "ha chop".

I can imagine in some Southern dialects they drop it pretty regularly, but most people pronounce the D.

Har dwerk

I've never heard a native English speaker say "har work".

I believe this feature of some English dialects is called glottic reinforcement, where word-final stops are often pronounced as unreleased stops [p̚ t̚ k̚] (my phone’s IPA keyboard doesn’t have the diacritic below). For me, the d in hard work is sometimes unreleased, and sometimes tapped [ɽ], but I don’t know if this is a quirk of my idiolect.

I've never heard any American accent where "hard work" is pronounced like "har work".

Nope. It’s there.

It should sound like her dwork

I say 'ard work - southern England but best not to drop any letters

Absolutely

for me, the d is just a slight, quick tap. almost just a soft T. maybe if i'm being slow and deliberate i'll pronounce the full d. but mostly it's just a tiny tap.

Absolutely

Nah....too much effort.

Yes but it’s not a full stop [d], it’s a flap [ɾ] like most intervocalic d’s

Native speaker here When I say it out loud, it really does just sound like I'm saying "*Har Dwerk*" rather than "*Hard Work.*" the D is noticeable, but there is a similar pause like there is with a word like "can't"

Yes. Harr-dwerk.

Yes

Yes

it goes like "har twork"

I’d think of it as “har dwork” while saying it

If I'm speaking fast, I barely pronounce it.

Yes

Yes, but it goes with the "w" that follows it, not the "r" that precedes it. Like, "har dwerk."

When a native speaker is talking fast (which is normal,) the D is spoken, but not distinctly, as it would be if followed by a vowel, like the word "hardy." But when followed by anything else, like hardly, or hard work (which is usually spoken as if it was one word: hardwork) the tip of the tongue doesn't lift right after the d, so the sound is more difficult to hear--a native speaker would hear it, but I can see how it would be missed by anyone else.

Yes, it is pronounced; just not as a stop. It's a tapped [ɾ] like the Ds in "ladder"

Yes. We'll drop a T at the end of a word, not usually a D.

Yes I pronounce the d