價格：免費
更新日期：2018-12-18
檔案大小：2.1M
目前版本：1.0
版本需求：Android 2.2 以上版本
官方網站：http://hyc-tech.com/springs/
Email：hycSprings@gmail.com
聯絡地址：48408 Red Run Drive Red Run Drive Canton, MI 48187
This program comprehensively analyzes the stresses and durability of mechanical extension springs. The following describes the detailed information:
SPRING LOADS AND EXTENDED POSITIONS
As shown in the force-deflection diagram in the program, the extension spring has an initial tension force that is coiled in the spring body. This initial tension keeps all coils contact each other when spring is at free stage. The spring serves at two extended positions with corresponding loads. The range of loads divided by the range of deflection defines the spring rate.
The spring length for the three loading conditions (free length, 1st stage loading, and 2nd stage loading) are measured from the hook inner hookup surface points.
TAPERED SPRING BODY
The spring body at the two ends may be coiled at reduced coil diameter to form a coned shape. Reducing the coil serve two purpose: reduce the hook stress or increasing the spring stiffness. The reduction rate and number of coil are used to define the taper rate. This analysis program provides the insight to reflect this feature.
HOOK ORIENTATIONS
For various spring installation condition, the two hooks may be oriented with each other in four configurations as indicated in the program.
STRESSES IN SPRING END HOOKS
When hook width is increased, the bending stress is increased. Also shown in the program is the radius for hook forming. The radius causes stress concentration. Short radius of R1 or R2 causes high torsion stress.
EXTENSION SPRING LIFE:
The fatigue life prediction of extension springs has been tested and reported extensively. The modified Goodman Diagram has been commonly used in the spring industry. This program adapts the published material by SAE for life estimation.
