| 1. | The property of viscoelastic interface fracture and the calculating method of fracture parameter are investigated
研究了粘弹性界面断裂的性质和断裂参量的计算方法。 |
| 2. | 4 . the influence of interfacial micro - crack point of new and old concrete on in adhesive fracture toughness is discussed
从界面断裂力学的基本理论出发，讨论了新老混凝土粘结面裂缝尖端微裂缝区对粘结面断裂性能的影响。 |
| 3. | Concerning on the modeling of the quasi - brittle fracture process at interface cracks of quasi - brittle materials , a comparative analysis was performed based on some typical constitutive models of interface cracks
摘要以混凝土界面断裂分析为目的，选取若干典型的层间界面准脆性断裂的本构模型进行分析和数值模拟对比研究。 |
| 4. | In order to make full use of advantages of high stress precision in iem and wide use of fem , zonal fem - iem is constructed to establish a foundation of method in viscoelastic interface mechanics
为充分利用界面元法应力精度高、有限元法适用范围广的优点,还建立了分区界面元-有限元法列式,为粘弹性界面断裂力学分析奠定了方法基础。 |
| 5. | It is concluded that the coulomb - type crack model is suitable for simulation of the interfacial fracture under mixed - mode fracture loads , however further work is still needed for improvement of its dilatancy properties
通过对数值结果的分析比较得出结论：库仑型裂纹模型比较适合模拟复杂载荷下的界面断裂行为，但是其扩容特性仍有待改善。 |
| 6. | Bi - material interfacial fracture theories are researched with a phenomenon that cracks extend along interface . a gradient invading model of interface crack at the crack tip can gain stress fields along interface . so a formula of energy release rate for 3d braided cmc is deduced and the corrected formula of the energy release rate is examined with test results
研究了裂纹沿界面扩展的双材料界面断裂理论，利用倾斜侵入界面的裂纹模型解析了裂纹尖端沿着界面的应力场，推导了表征三维编织cmc复合材料断裂韧性的能量释放率公式g _ c ，并且用试验结果验证了能量释放率公式的正确性。 |
| 7. | 5 . the micro - crack fracture expansive process of adherence of new and old concrete is analyzed by means of chaos theory . the result shows that the stable extension , bifurcate and unstable extension of original micro - crack fracture is coincidence with model of the stationary state zone , bifurcate zone and chaos zone of double periodic bifurcate theory of chaos
用混沌理论分析了新老混凝土粘结界面断裂损伤微裂缝动态扩展过程，界面层原始微裂缝的稳定、稳定扩展和失稳扩展的动态扩展过程与混炖理论中倍周期分叉的定态区、分叉区和混饨区模型相符合。 |
| 8. | Because the propellant grain is viscoelastic material , the liner and adiabatic layer are also viscoelastic one , the interface debond problem is actually interface crack about elastic - viscoelastic or bi - viscoelastic materials . research about this problem relates to the knowledge of viscoelastic mechanics and interface fracture and combustion . numerical analysis method about interface debond on solid rocket motor is researched in this paper
由于固体火箭发动机的推进剂药柱是一种粘弹性材料,衬层和绝热层也具有粘弹性性质,因此其界面脱粘问题实际上是弹性-粘弹性或双粘弹性各向同性材料界面裂纹问题,对该问题的研究涉及到粘弹性力学、界面断裂力学和燃烧学等相关学科。 |
