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     because each crack may be embedded in the stress-amplifying region as well as the stress-shielding region of the other cracks at this time To improve the accuracy of the Kachanov method, a new asymptotic method, in which the influence on a crack of the quadratic parabola pseudo tractions rather than the average ones on the other crack are taken into account, is proposed.
     但当裂纹非常靠近或者沿主荷载方向重叠时,由于裂纹尖端进入了其它裂纹的应力强化区或者应力屏蔽区,强相互作用使得该假设不再合理,从而带来较大的误差. 为了提高分析近置多裂纹问题的精度,将裂纹表面伪面力分解为抛物线型分布部分及高阶部分,考虑抛物线型分布张力对其他裂纹的影响,同样忽略高阶部分的影响.
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     Hydredynamic loads;
     水动力荷载
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     DETERMINATION OF WIND LOADS ON CANTILEVERED ROOFS OF STADIUM GRANDSTAND
     体育场看台悬挑屋盖的风荷载计算
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     3. It simulates the effect of main crack to limit flexural loading;
     3、模拟了裂缝产生对破坏荷载的影响;
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     THE ICE LOAD ON CONE
     锥面的冰荷载
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     Separation of main work and non-main work;
     辅分离;
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  primary load
Indeed, recent histopathological data suggest that aneurysms enlarge due to a stress-mediated process of growth and remodeling of collagen, the primary load-bearing constituent within the wall.
      
XETs can modify xyloglucan, one of the primary load-bearing components of the cell wall; therefore XETs may be critical for these processes.
      
Bed level is the primary load-controlling parameter in the PFBC boiler.
      
Energy is effectively dissipated in conventional lateral-force-resisting systems through damage to the primary load-carrying components.
      
For the Woodrow Wilson Bridge, the intermediate diaphragms are primary load carrying members.
      
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An approximate method of stress analysis in elastic solids with multiple cracks is proposed to improve the accuracy of the Kachanov method in analyzing closely-spaced cracks. Classical Kachanov method assumed that traction in each crack can be represented as a sum of a uniform component and a non-uniform one, and the interaction among the cracks is only due to the uniform components. The assumptions simplify considerably the mathematics. However, the assumptions may not be valid when the cracks are very close...

An approximate method of stress analysis in elastic solids with multiple cracks is proposed to improve the accuracy of the Kachanov method in analyzing closely-spaced cracks. Classical Kachanov method assumed that traction in each crack can be represented as a sum of a uniform component and a non-uniform one, and the interaction among the cracks is only due to the uniform components. The assumptions simplify considerably the mathematics. However, the assumptions may not be valid when the cracks are very close and overlap along the direction of load. because each crack may be embedded in the stress-amplifying region as well as the stress-shielding region of the other cracks at this time To improve the accuracy of the Kachanov method, a new asymptotic method, in which the influence on a crack of the quadratic parabola pseudo tractions rather than the average ones on the other crack are taken into account, is proposed. Applications to the problem of three collinear cracks and two offset parallel closely-spaced cracks are considered to validate the accuracy of the new method

考虑到近置裂纹的强相互作用,提出了一种多裂纹相互作用的渐近分析方法.经典Kachanov方法将裂纹表面伪面力分解为两部分:均匀分布部分和非均匀部分,并假设裂纹的相互作用仅由均匀部分引起,而忽略非均匀部分的影响.该假设大大简化了分析过程,而且当裂纹间距不是很小时,有很好的精度.但当裂纹非常靠近或者沿主荷载方向重叠时,由于裂纹尖端进入了其它裂纹的应力强化区或者应力屏蔽区,强相互作用使得该假设不再合理,从而带来较大的误差.为了提高分析近置多裂纹问题的精度,将裂纹表面伪面力分解为抛物线型分布部分及高阶部分,考虑抛物线型分布张力对其他裂纹的影响,同样忽略高阶部分的影响.通过对三共线裂纹及两平行偏置裂纹两个实例的分析,验证了对于近置裂纹,新渐近方法具有良好的精度.

 
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