骨盆目的是加强而不是弯曲载荷下断裂，从而保持持续的负荷曲线。
The pelvic bolster is designed to bend but not fracture under load, thus maintaining a continuous loading curve.
在冲击负荷下，最大负荷超过了轧辊芯部材料所能承受的最大抗弯曲负荷，发生截面断裂。断裂一般产生于负荷应力为最大的截面。
Under shock load conditions the peak load can exceed the ultimate bending strength of the core material and fracture occurs, usually at the most highly stressed cross section area.
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