A.正應(yīng)力B.切應(yīng)力C.復(fù)合應(yīng)力
A.熔點(diǎn)低、硬度低 B.硬度高、熔點(diǎn)低 C.硬度高、熔點(diǎn)高 D.硬度低、熔點(diǎn)低
A.靜載荷 B.沖擊載荷 C.交變載荷