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elastic dynamical theory
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  弹性动力学理论
     This paper discusses the computational model based on the elastic dynamical theory as well as the dynamic photoelastic experiment and concrete model tests, which could be used to explain this phenomenon and the possibility of breaking rock boulders by this method.
     为解释这一现象并进一步探讨利用类似方法破碎岩块的可能性,本文介绍了应用弹性动力学理论建立的计算模型以及所进行的动光弹和混凝土块模型试验。
短句来源
  相似匹配句对
     Basic Test and Dynamical Analysis for Elastic Sleeper
     弹性轨枕有碴轨道的基础试验与动力分析
短句来源
     The Associated Dynamical Equation on Wobble and Nutation of the Elastic Earth
     弹性地球极移和章动的联合动力学方程
短句来源
     ON A VARIATIONAL PRINCIPLE IN THE THEORY OF DYNAMICAL STABILITY OF ELASTIC SYSTEMS
     弹性系统动力稳定理论中的一个变分原理
短句来源
     Applying elastic theory,the nonlinear dynamical equation of the system is established.
     按照弹性力学理论建立非线性地基上圆形薄板受简谐激励的动力学方程。
短句来源
     Coupling dynamical modeling theory of elastic beam-inlarge overall motions
     作大范围运动弹性梁刚-柔耦合动力学建模
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Tests showed that a brittle block subjected to two point explosion loadings at two symmetric surfaces could fracture along a plane passing through the line connecting the two loading points. This paper discusses the computational model based on the elastic dynamical theory as well as the dynamic photoelastic experiment and concrete model tests, which could be used to explain this phenomenon and the possibility of breaking rock boulders by this method. The results from this study indicat that in the described...

Tests showed that a brittle block subjected to two point explosion loadings at two symmetric surfaces could fracture along a plane passing through the line connecting the two loading points. This paper discusses the computational model based on the elastic dynamical theory as well as the dynamic photoelastic experiment and concrete model tests, which could be used to explain this phenomenon and the possibility of breaking rock boulders by this method. The results from this study indicat that in the described loading conditions, the stress waves, especially the tensile stress wave reflected from the free face, play an important role in breaking the block. Because of existence of multi - dimensional tensile stress concentration, radial cracks tend to appear at the edges of the loading surface. Then, under the influence of reflected wave from the lateral free face, these cracks would extend and join in the center of the block, then finally split the block. The symmetric loading could cause superposition of stress waves and make the block easily fully fractured.

实验表明,受对称布置的表面爆炸载荷的脆性块体,会在通过载荷作用点连线的某一平面上破裂。为解释这一现象并进一步探讨利用类似方法破碎岩块的可能性,本文介绍了应用弹性动力学理论建立的计算模型以及所进行的动光弹和混凝土块模型试验。研究结果表明:在所述载荷条件下,应力波特别是自由界面反射的拉伸波对块体的破碎起重要作用;由于多向拉应力集中,在块体加载端面梭边中部最易产生径向裂隙,此后在侧面反射波的作用下裂隙延伸,与中部可能存在的裂纹贯通,从而将块体破开;对称加载使应力波在块体内多次叠加有利于块体充分破碎。

 
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