目的总结后外侧倒L形入路3.5 mm T形支撑钢板治疗单纯后外侧胫骨平台骨折的临床疗效。方法 2011年3月—2016年1月,采用后外侧倒L形入路3.5 mm T形支撑钢板内固定治疗单纯后外侧胫骨平台骨折13例。男6例,女7例;年龄28~52岁,平均43岁。左...目的总结后外侧倒L形入路3.5 mm T形支撑钢板治疗单纯后外侧胫骨平台骨折的临床疗效。方法 2011年3月—2016年1月,采用后外侧倒L形入路3.5 mm T形支撑钢板内固定治疗单纯后外侧胫骨平台骨折13例。男6例,女7例;年龄28~52岁,平均43岁。左侧5例,右侧8例;致伤原因:交通事故伤6例,摔伤3例,高处坠落伤4例。术前行X线片、CT三维重建和MRI检查,均为单纯后外侧胫骨平台骨折;Schatzker分型:Ⅱ型4例,Ⅲ型9例。受伤至手术时间5~9 d,平均7 d。结果术后1例患者切口皮肤坏死,给予清创植皮后创面愈合;余均Ⅰ期愈合。13例患者均获随访,随访时间10~16个月,平均13个月。所有患者术后3个月X线片示骨折线均模糊,术后12个月骨折线均消失。无切口感染、重要血管神经损伤、内固定物松动或断裂以及关节面再次移位塌陷等并发症发生。末次随访时按改良美国特种外科医院(HSS)膝关节功能评分评价膝关节功能,获89~97分,平均94分;均达优。结论后外侧倒L形入路3.5 mm T形支撑钢板内固定可作为治疗单纯后外侧胫骨平台骨折的首选手术方式之一。展开更多
The thermal behavior of a thick transversely isotropic FGM rectangular plate was investigated within the scope of three-dimensional elasticity. Noticing many FGMs may have temperature-dependent properties, the materia...The thermal behavior of a thick transversely isotropic FGM rectangular plate was investigated within the scope of three-dimensional elasticity. Noticing many FGMs may have temperature-dependent properties, the material constants were further considered as functions of temperature. A solution method based on state-space formulations with a laminate approximate model was proposed. For a thin plate, the method was clarified by comparison with the thin plate theory. The influences of material inhomogeneity and temperature-dependent characteristics were finally discussed through numerical examples.展开更多
This paper considers the pure bending problem of simply supported transversely isotropic circular plates with elastic compliance coefficients being arbitrary functions of the thickness coordinate. First, the partial d...This paper considers the pure bending problem of simply supported transversely isotropic circular plates with elastic compliance coefficients being arbitrary functions of the thickness coordinate. First, the partial differential equation, which is satisfied by the stress functions for the axisymmetric deformation problem is derived. Then, stress functions are obtained by proper manipulation. The analytical expressions of axial force, bending moment and displacements are then deduced through integration. And then, stress functions are employed to solve problems of transversely isotropic functionally graded circular plate, with the integral constants completely determined from boundary conditions. An elasticity solution for pure bending problem, which coincides with the available solution when degenerated into the elasticity solutions for homogenous circular plate, is thus obtained. A numerical example is finally presented to show the effect of material inhomogeneity on the elastic field in a simply supported circular plate of transversely isotropic functionally graded material (FGM).展开更多
文摘目的总结后外侧倒L形入路3.5 mm T形支撑钢板治疗单纯后外侧胫骨平台骨折的临床疗效。方法 2011年3月—2016年1月,采用后外侧倒L形入路3.5 mm T形支撑钢板内固定治疗单纯后外侧胫骨平台骨折13例。男6例,女7例;年龄28~52岁,平均43岁。左侧5例,右侧8例;致伤原因:交通事故伤6例,摔伤3例,高处坠落伤4例。术前行X线片、CT三维重建和MRI检查,均为单纯后外侧胫骨平台骨折;Schatzker分型:Ⅱ型4例,Ⅲ型9例。受伤至手术时间5~9 d,平均7 d。结果术后1例患者切口皮肤坏死,给予清创植皮后创面愈合;余均Ⅰ期愈合。13例患者均获随访,随访时间10~16个月,平均13个月。所有患者术后3个月X线片示骨折线均模糊,术后12个月骨折线均消失。无切口感染、重要血管神经损伤、内固定物松动或断裂以及关节面再次移位塌陷等并发症发生。末次随访时按改良美国特种外科医院(HSS)膝关节功能评分评价膝关节功能,获89~97分,平均94分;均达优。结论后外侧倒L形入路3.5 mm T形支撑钢板内固定可作为治疗单纯后外侧胫骨平台骨折的首选手术方式之一。
文摘The thermal behavior of a thick transversely isotropic FGM rectangular plate was investigated within the scope of three-dimensional elasticity. Noticing many FGMs may have temperature-dependent properties, the material constants were further considered as functions of temperature. A solution method based on state-space formulations with a laminate approximate model was proposed. For a thin plate, the method was clarified by comparison with the thin plate theory. The influences of material inhomogeneity and temperature-dependent characteristics were finally discussed through numerical examples.
基金Project (Nos. 10472102 and 10432030) supported by the NationalNatural Science Foundation of China
文摘This paper considers the pure bending problem of simply supported transversely isotropic circular plates with elastic compliance coefficients being arbitrary functions of the thickness coordinate. First, the partial differential equation, which is satisfied by the stress functions for the axisymmetric deformation problem is derived. Then, stress functions are obtained by proper manipulation. The analytical expressions of axial force, bending moment and displacements are then deduced through integration. And then, stress functions are employed to solve problems of transversely isotropic functionally graded circular plate, with the integral constants completely determined from boundary conditions. An elasticity solution for pure bending problem, which coincides with the available solution when degenerated into the elasticity solutions for homogenous circular plate, is thus obtained. A numerical example is finally presented to show the effect of material inhomogeneity on the elastic field in a simply supported circular plate of transversely isotropic functionally graded material (FGM).
