Yakuniy kuch deganda ob'ektga tashqi kuch ta'sirida shikastlanganda yuzaga keladigan maksimal kuchlanish tushuniladi, uni nosozlik kuchi yoki nosozlik stressi deb ham atash mumkin. Materialning tashqi kuchning shikastlanishiga qarshilik ko'rsatishning maksimal qobiliyati birgalikda kuch chegarasi deb ataladi.
