The P wave is inversely proportional to crack density.
波速度与裂隙密度成反比关系。
Because the most of cracks occur in early stage, it is very important to find out the causes of crack occurrence and its control countermeasures. This p...
而裂缝大多又是在早期产生的，因此，探讨裂缝产生的原因和防止裂缝的出现就显得格外重要。
The results show that brittle fracture occurs in matrix and the P-WCMOD(crack mouth opening displacement) curve is linear till loading to failure.
实验结果表明：水泥基体发生脆性断裂，从加载到试件破坏P-WCMOD曲线一直呈线性；
Moreover, investigated the relation among the P wave velocity, the micro-crack in rock with the variation of core diameter.
探讨了岩石的微观裂隙、超声波速度与岩芯变形之间的关系。
O. P. : In the scene when Draco is in the tower with Dumbledore, the element of choice is there, and he starts to crack and we see that other side.
有一个场景是德拉科和邓布多在塔上，他必须做出选择，结果他开始崩溃的哭泣，当时我们看到了他的另一面。
Q-P process significantly improve crack initiation and propagation resistance of 300M steel, and extend the uniform plastic deformation stage of the material, and finally put off the necking creation.
Q-P工艺明显提高了300M钢抗裂纹形成和扩展的能力，延长了材料的均匀塑形变形阶段，推迟缩颈发生。
The results show that steel fiber reinforced ferroconcrete T beam possesses high bending strength and excellent crack resistance p…
结果表明，钢纤维增强钢丝网混凝土T形梁具有较高的正截面抗弯强度和良好的抗裂性能。
The results show that steel fiber reinforced ferroconcrete T beam possesses high bending strength and excellent crack resistance p…
结果表明，钢纤维增强钢丝网混凝土T形梁具有较高的正截面抗弯强度和良好的抗裂性能。
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