Size Effect of Micro-bending Spring-Back for C5210 Phosphor Bronze Sheet
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摘要: 采用RG-2000型微机控制电子万能试验机，通过微弯曲试验，研究了C5210磷青铜薄板的厚度、晶粒尺寸以及弯曲半径等相关尺寸对其微弯曲回弹的影响。结果表明：C5210磷青铜薄板的厚度、晶粒尺寸和弯曲半径等对其回弹均有显著的影响，具有明显的尺寸效应；薄板的厚度越大，回弹量越小，厚度对回弹量的影响非常显著；薄板的晶粒尺寸越大，回弹量越小，当晶粒尺寸大于40 μm时，回弹量呈缓慢减小趋势；回弹量随着弯曲半径的增大而增大，而且薄板的厚度越小，增大的趋势越明显。Abstract: Micro-bending tests were conducted by RG-2000 micro-computer control electronic universal testing machine. The influence of thickness, grain size, bending radius of C5210 phosphor bronze sheet on micro-bending spring-back was researched. Results show that the thickness, grain size, bending radius of C5210 phosphor bronze sheet had a significant effect on the spring-back and that showed an obvious size effect. The spring-back amount decreased as sheet thickness increased, and thickness affected the spring-back amount obviously. The spring-back amount decreased with increasing of grain size, when the grain size was larger than 40 μm, the amount of spring-back decreased slowly. The spring-back amount increased as the bending radius increased, and the trend of increase was more obvious when the thickness of sheet was smaller.
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Keywords:
- size effect /
- micro-bending /
- C5210 phosphor bronze /
- spring-back amount
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