poisons ratio meaning in Chinese

泊松比

But people still do n ' t master the mechanical property of the concrete comprehensively for the complex conditions , especially , in the low temperature , the mechanical capability , change of tensile and compression strength , elasticity module , the development law of poison ratio , the differential of all the mechanical indexes
但是，由于混凝土材料组成结构的复杂性以及受外界荷载和其它因素的影响，对混凝土的力学性能还不能说完全准确掌握，特别是低温情况下混凝土的力学性能。混凝土在低温下的抗压强度、抗拉强度如何变化，弹性模量、峰值应变在低温条件下有什么样的发展规律，低温下和常温条件下各个力学指标有什么差异等问题。