| 1. | Influence of texture on residual strain in cvd free standing diamond films 自支撑金刚石薄膜残余应变的影响 |
| 2. | Standard test method for residual strain measurements of thin , reflecting films using an optical interferometer 用光学干涉仪测量反射薄膜残余应力的标准试验方法 |
| 3. | Test method for photoelastic measurements of birefringence and residual strains in transparent or translucent plastic materials 透明和半透明塑性材料双光折射及残余应变的光弹性测量的试验方法 |
| 4. | Standard test method for photoelastic measurements of birefringence and residual strains in transparent or translucent plastic materials 透明或半透明塑性材料中双折射及残余应变的光弹性量度的标准试验方法 |
| 5. | The residual deformation around the hole was measured by digital speckle correlation technique and the relation curves of residual strain at the side of hole vs fatigue life cycles were obtained 再应用数字散斑相关技术测量了不同疲劳循环次数后孔周的残余变形场,并给出了孔边最大残余应变与疲劳循环次数的关系曲线。 |
| 6. | Under the same consolidation ratio and the vibration times , effect of the dynamic stress on the dynamic residual strain shows linear relationship , and effect of the vibration times on the dynamic residual strain increasing 在同一固结比和同振次条件下,动应力对动残余应变的影响约呈线性关系,且振次对动残余应变的影响呈逐渐增大的变化关系。 |
| 7. | Damage develops fast after that period . and a nonlinear formula with parameter of unloading modulus and residual strain was brought out to describe damage development in tensile test . it is also found that mechanical properties of c fiber are much less than those of t300 fiber bundles 另外,通过进一步的分析发现三维编织c sic复合材料中纤维束的就位性能远远低于其摘要原位性能,这正是c / sic复合材料的拉伸性能远低于t300 / qy9512复合材料的主要原因。 |
| 8. | 3 . studying on prediction methods of the initiation life of aero - gear using shakedown analysis methods in order to directly consider in a quantitative way the details of stress - inelastic strain responses , residual stress and residual strain computations , fatigue crack initiation life was evaluated in aero - gear by using th 利用chaboche的材料模型,研究了航空齿轮韧性材料在弹、塑性安定下的轮齿接触疲劳裂纹萌生准则,该研究结果与相关的齿轮实验结果比较分析表明:塑性安定下的疲劳裂纹萌生预测方法预测航空齿轮的萌生寿命是较安全的。 |
| 9. | The mechanism of reinforcing steel bar under the press or pull is researched and the characteristics under the pull - press cyclic loading is studied in composite foundation . it shows that the stress concentrating on the reinforcing steel bar and the increasing stress can be seen with the increasing of cyclic times . residual strain always exists after unloading without considering the size of pullout force and increases slowly with the cyclic times 探讨了复合地基中抗拔钢筋的受压受拉机理及在拉压循环荷载作用下的性状,研究发现,随拉压循环次数的增加,应力向钢筋集中,钢筋承受的压力随着增大;无论上拔力大小,卸载后都有残余变形,并随着拉拔循环次数的增加而缓缓增加;抗拔碎石桩破坏性状明显,可明确的得到抗拔碎石桩的破坏荷载。 |
| 10. | In this thesis , the strain - hardening model of contact surface layer , the numerical theories and computational methods for shakedown analyses of contact body are systematically studied and applied to the aero - gear . the mentality is that the effects of the surface hardening and contact fatigue on contact surface layer under cycle contact loading are investigated by using shakedown analysis methods considering in a quantitative way the details of stress - inelastic strain responses , residual stress and residual strain computations 在国家“航空基金” 、 “总装预研基金”等课题的资助下,本文以接触体安定分析与接触表面层疲劳裂纹萌生寿命预测一般算法研究为手段,深入、系统研究了接触体安定分析的数值理论和计算方法,全面研究了影响航空齿轮表面强化层失效的原因并提出了齿轮表面强化层裂纹萌生寿命的预测方法。 |