主要应力 meaning in Chinese

basic stress
primary stress

( 5 ) the thermal - stress coupled field in the barrel when machine gun firing successively is analyzed by way of fea ; the results display that the main load in the barrel is thermal stress , and thermal stress is the main reason for the reduce of the barrel ' s life - span
对某机枪发射过程中枪管的热? ?力耦合场进行了分析，认为在机枪射击过程中枪管承受的主要应力是热应力，热应力是造成枪管寿命降低的主要原因。