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SIZE EFFECT BASED ON A DECOHESIVE CRACK SOLUTION FOR THE COMPACT TENSION SPECIMEN USING BEAM THEORY

机译:基于使用光束理论的紧凑张力试样的解粘裂纹解决方案的尺寸效应

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An analytical solution is obtained for the compact tension specimen modeled as a double-cantilevered beam with a linearly softening relation for the discontinuity. It is assumed that cracking does not occur until a critical value of traction is reached rather than assuming that failure initiates immediately. The consequence is that the solution must be separated into phases with continuity conditions invoked to transition from one phase to the next. The advantage of an analytical solution is that dimensionless variables are defined naturally as part of the analysis. Critical cases are identified and one can see immediately what size the structure must be in order for traditional scaling relationships to hold. In particular, it is shown that for short specimens, there is a significant reduction in maximum force from the conventional scaling relation that involves the square root of a size parameter. This reduction is obtained without the assumption that material parameters depend on specimen size.
机译:为具有线性软化关系的双悬臂梁建模的紧凑张力样本获得了分析溶液,用于不连续性。假设在达到牵引的临界值而不是假设故障立即启动的临界值之前,不会发生破裂。结果是,解决方案必须分成与调用连续性条件的阶段,以从一个相到接下来的转换。分析解决方案的优点是,无量子变量是自然定义的,作为分析的一部分。识别危急情况,可以立即看到结构必须是什么尺寸,以便传统的缩放关系保持。特别地,示出了对于短标本,来自传统缩放关系的最大力显着降低,其涉及尺寸参数的平方根。获得该减少而不假设材料参数取决于样品尺寸。

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