...Von Meyer,Roux 和Wolff就作了关于的生物力学负荷与其适应性变化的研究,其中以Wolff最为出名:即规则应力(principle stress)影响的重建活动。而关于种植体周围牙槽骨的力学负荷的影响因素及其与牙槽骨吸收之间的相互关系近年也有相当数量研究。
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method of principle stress difference 主应力差法
principle of effective stress 有效应力原理
mean principle stress 平均主应力
major principle stress 最大主应力
least principle stress 最小主应力
A tortuous fracture is induced while the azimuth of the perforation doesn’t match the azimuth of principle stress, Sometimes it results in sand plug.
当射孔方位与主应力方向不匹配时,将产生曲折裂缝,水力压裂时容易出现砂堵而导致施工失败。
参考来源 - 射孔井筒水力压裂的裂缝形态研究·2,447,543篇论文数据,部分数据来源于NoteExpress
Moreover, the feasibility of brittle-ductile transition of monocrystalline Silion is studied with the method of first principle stress.
并用第一原理应力计算方法对单晶硅纳米切削过程中的脆塑转变的可行性进行了研究。
Results: the variation of tooth position gave no effects to the directions of principle stress around apex area in symmetrical occlusal type.
结果:在对称性咬合,牙位的变化对各牙的根尖主应力方向无影响。
The results indicate that: the mixture mixed polypropylene fiber can reduce the principle stress value of bottom of lime-fly ash stabilized gravel.
结果表明:聚丙烯纤维的掺加能够有效降低半刚性基层层底拉应力大小。
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