| 1. | Considering the judgment of dynamic instability of truss structures , a stress rate method for dynamic instability analysis of truss structures was proposed
摘要针对结构动力失稳的判定问题，提出了一种适用于杆系结构动力稳定分析的应力变化率法。 |
| 2. | Advanced technical ceramics - monolithic ceramics - mechanical properties at room temperature - determination of subcritical crack growth parameters from constant stressing rate flexural strength tests
高技术陶瓷.整体陶瓷.室温机械性能.用固定应力率的弯曲强度试验测定亚临界裂纹增长参数 |
| 3. | The results show that the stress rate criterion applies for the judgment of the truss structural instability , and the criterion is more effective and definite in the local instability
结果表明，应力变化率准则可以有效判定杆系结构的动力失稳，并且在判定结构的局部失稳方面非常有效和明确。 |
| 4. | Advanced technical ceramics - mechanical properties of monolithic ceramics at room temperature - part 3 : determination of subcritical crack growth parameters from constant stressing rate flexural strength tests ; german version en 843 - 3 : 2005
高级工业陶瓷.室温下整体陶瓷的机械特征.第3部分:恒 |
| 5. | Advanced technical ceramics . monolithic ceramics . mechanical properties at room temperature . determination of subcritical crack growth parameters from constant stressing rate flexural strength tests
高技术陶磁.整体陶磁.室温下的机械性能.第3部分:从恒定应力率挠性强度试验中测定亚临界裂缝扩大参数值 |
| 6. | Advanced technical ceramics - mechanical properties of monolithic ceramics at room temperature - part 3 : determination of subcritical crack growth parameters from constant stressing rate flexural strength tests
高级工业陶瓷.室温下块体陶瓷的机械特性.第3部分:从恒定应力率弯曲强度试验中测定亚临界断裂增长系数 |
| 7. | Taking four spatial truss structures as examples , the structural dynamical stability analyze was carried out applying the stress rate criterion , and the data of the stress rate criterion analysis was compared with those of the displacement criterion analysis
以四种突间杆系结构为例，应用应力变化率准则进行了结构的动力稳定分析，并将结果同位移准则分析的结果进行了比较。 |
| 8. | Based on the catastrophic characters of the whole strain energy in truss structural instability , the relationship between the whole strain energy and the stress rate in the link element was educed , and the stress rate criterion for judging the instability of truss structures was built up through analyzing the changing law of stress rate
基于杆系结构发生动力失稳时的总应变能突变特征，推导总应变能同杆单元应力变化率之间的关系，并分析应力变化率的变化规律，建立了判定系结构动力失稳的应力变化率准则。 |
| 9. | It adopts pc computer control , the high accuracy force value sensing test system , step - motor direct driving ball threaded screw methods it may set arbitrary numbers for the parameters such as gripped sample length stress rate , test times etc . the testing results would be output in forms of chinese characters reporting statistics through the printer
采用pc机控制,高精度力值传感测量系统及步进电机直接驱动滚珠丝杆方式.对夹持试样长度.拉伸速度.实验次数等参数均能任意设定.测试结果由打印机输出 |
| 10. | Abstract : incompatible element nh11 and hybrid stress element 18 were employed to analyze rock burst occurring in coal face 9108 of sanhejian coal mine . compared with the results from ansys , the two optimized fems can execute more accurate numerical simulation in the research of rock burst as well as other rock problems and lessen the errors from inaedquately meshing in huge calculations due to the limitation of labor and computer time . in addition , the criterion of averaged generalized stress rate was proposed and used to determine the site and moment of rock burst . the given conclusion is in accordance with the face of coal face 9108 very well
文摘:利用优化非协调元和杂交元分析了三河尖矿冲击矿压，并与ansys程序的计算结果进行了比较.认为优化有限元在冲击矿压乃至岩石材料的数值模拟中能给出更为精确的结果，也可减小大型计算中由于人力、机时所限粗分网格产生的误差.分析中，采用了广义平均应力率准则来判断冲击点位置和冲击时刻，所得结论与实际情况吻合 |
