A crack surface displacement of four-point-bend specimen under three types of loading is studied in this paper.
研究了四点弯曲型试件在各种类型载荷作用下的裂纹面位移，并考虑了裂纹尖端塑性区对它的影响。
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Methods: the osteoblast-like cell MG-63 were stimulated with different amplitude by four-point-bend loading device, and the different proliferative index after tension-stress load were studied.