DIP引脚应变分析

为了研究双列直插式元件在振动冲击环境下的可靠性,首先通过建立其物理模型,利用莫尔积分方法对引脚的变形进行分析,可以得到引脚任意位置的变形量;而后建立元件的实体模型,利用有限元方法对其应力应变进行仿真分析,结果表明在外载荷作用下,引脚是元件的薄弱环节,尤其在引脚与其他部位连接位置处易出现应力集中使其应变量较大,导致可靠性降低;最后进行振动冲击环境下的应变测量试验,在30 g的冲击载荷下,引脚的最大变形量可达66.47×10-6,在50 g的冲击载荷下,引脚的最大变形量可达173.95×10-6,在扫频过程中,当激振频率为146.48 Hz时,引脚的变形量最大。

The Strain Analysis of The Dual In-line Package Pins

In order to study the reliability of the Dual In-line Package electronic components in vibration and shock environment. First of all,through the establishment of its physical model,by using the Moore integral method to analyze the deformation of the pins and the deformation at any position can be obtained. Then established the entity model of the electronic components and analyzed its stress and strain by using the finite element method,the results show that the pins is the weakest link element under the external load,especially the connecting position between the pins and the other parts which prone to stress concentration to make the deformation in a large value and reduced its reliability. Finally the strain measurement test of the pins under vibration and shock environment was done,the maximum deformation of the pins can up to 66.47í10 -6 in the impact load of 30 gravitational acceleration,the maximum deformation of the pins can up to 173.95í10-6 in the impact load of 50 gravitational acceleration,when the excitation frequency is 146.48 Hz,the deformation of the pin has the maximum value in the sweep process.