Hip dislocation and the sequel of recurrent instability continues to be a problem following Total Hip Arthroplasty, and is one of the leading causes of revision surgery.
髋关节脱位以及不稳定是髋关节置换的主要问题，是髋关节置换术后翻修的首要原因。
Instability: Dislocation is one of the most common complications of total hip arthroplasty.
不稳：脱位是全髋置换最常见的并发症之一。
To evaluate fracture instability, the total sum of stresses due to residual welding or rolling stresses, dead load, and live loads must be considered.
计算断裂失稳性时，必须考虑焊接或轧制残余应力，恒载应力和活载应力之总和。
Results show that increasing the thickness of the vessel only cannot effectively increase its anti-instability and on the opposite, the total weight will increase substantially.
结果发现，单纯增加壳体厚度既不能有效提高容器抗外压失稳能力，又会使设备制造成本明显提高；
Results show that increasing the thickness of the vessel only cannot effectively increase its anti-instability and on the opposite, the total weight will increase substantially.
结果发现，单纯增加壳体厚度既不能有效提高容器抗外压失稳能力，又会使设备制造成本明显提高；
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