1.前言电子设备在现场使用时,一般要承受各种应力的影响。这些应力大致上分为环境应力、电气应力及时间应力。这些应力大都不是单独存在,而是以复杂的关系组合在一起的。然而,为要了解电子设备的故障或寿命,首先就要分别地讨论这些应力的影响。即应力试验目 的 1. Introduction The use of electronic equipment in the field, the general to withstand the impact of various stresses. These stresses are roughly divided into environmental stress, electrical stress and time stress. Most of these stresses do not exist alone, but in complex relationships together. However, in order to understand the failure or lifetime of electronic equipment, the impact of these stresses must first be discussed separately. That stress test purposes