...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Engineering Fracture Mechanics >Direct comparison of anisotropic damage mechanics to fracture mechanics of explicit cracks
【24h】

Direct comparison of anisotropic damage mechanics to fracture mechanics of explicit cracks

机译：直接比较各向异性损伤力学对明确裂缝的裂缝力学

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Because damage mechanics modeling involves damage initiation followed by propagation that releases energy, it is often uncritically assumed to be an alternative implementation of fracture mechanics. This paper tests that claim by running side-by-side damage mechanics and explicit crack fracture mechanics simulations within the same code on three separate problems. For a center-notched specimen loaded in tension, damage mechanics can reproduce all features of fracture mechanics, but with three restrictions. First, damage mechanics must implement anisotropic damage mechanics rather then simpler isotropic or scalar damage methods. Second, initiation stress and toughness used in damage mechanics must be calibrated before damage mechanics can reproduce either fracture mechanics or experimental results. Third, damage mechanics properties must scale with absolute size of discretization elements. Two other problems considered were mixed-mode, dynamic fracture and cracking of a brittle coating on a substrate. In each case, anisotropic damage mechanics can be made consistent with fracture mechanics by suitable calibration of properties. An advantage of damage mechanics is its potential to model certain complicated issues better then explicit crack fracture mechanics. Two examples are dealing with a transition to shear failure and modeling of fracture events such as periodic cracking in coatings.
机译：由于损坏力学建模涉及损坏启动，然后释放能量的传播，因此通常是无标识地假设骨折力学的替代实施。本文通过在三个单独问题的同一代码中运行并排损伤力学和明确的裂缝骨折力学模拟来测试。对于加载张力的中心缺口样本，损坏力学可以再现骨折力学的所有特征，但具有三种限制。首先，损坏力学必须实施各向异性损伤力学，而是更简单的各向同性或标量损伤方法。其次，在损坏力学可以恢复骨折力学或实验结果之前，必须校准在损伤力学中使用的起始应力和韧性。第三，损坏力学属性必须以绝对的离散化元素缩放。考虑了另外两种问题是混合模式，脆性涂层在基材上的动态断裂和破裂。在每种情况下，各向异性损伤力学可以通过适当的特性校准与断裂力学一致。损坏力学的优点是它可能更好地模拟某些复杂问题，然后明确的裂缝骨折力学。两个例子正在处理过渡到剪切失败和裂缝事件的建模，例如在涂料中的周期性裂缝。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号