神马作文网机械方面的英语翻译 请各位高手帮忙翻译一下 谢谢了
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机械方面的英语翻译 请各位高手帮忙翻译一下 谢谢了
Three-dimensional numerical simulations are performed to investigate the dynamic tensile properties of ceramics, using explicit dynamic FEM and cohesive element techniques. A
micro-cracking model considering the stochastic distribution of internal defects is developed. The model consists of a Weibull distribution of the local strengths, and a facet area modification that accounts for the equivalent geometry of the elements.Preliminary calculations are performed to verify the capability of this model in addressing mesh-dependency. The calculations show that the brittleness of the material tends to deteriorate the
mesh-dependency problem. However, by using the equivalent geometry modification with adequate parameters, the unwanted mesh-dependency can be satisfactorily corrected. Parametric studies are performed to investigate the influences of the fracture energy and Weibull modulus. It is seen that for a fixed loading speed, the strength of the specimen increases with the fracture energy, but decreases when the material becomes more heterogeneous. The scatter of specimen strengths decreases when the material becomes more ductile. The observed phenomena are explained by the micro-cracking mechanism of ceramics failure. The effect of loading speed is also investigated, significant rate-hardening effect is observed. It is shown that the micro-cracking mechanism, which is different in the dynamic loading case and static loading case, can explain the observed
rate-dependency of the ceramic
tensile strength.
2004 Published by Elsevier Ltd.
Keywords: Dynamic fracture; Ceramics; Stochastic property; Numerical simulation; Micro-cracking mechanism; Mesh-dependency;
Rate-hardening
不要机器回答
Three-dimensional numerical simulations are performed to investigate the dynamic tensile properties of ceramics, using explicit dynamic FEM and cohesive element techniques. A
micro-cracking model considering the stochastic distribution of internal defects is developed. The model consists of a Weibull distribution of the local strengths, and a facet area modification that accounts for the equivalent geometry of the elements.Preliminary calculations are performed to verify the capability of this model in addressing mesh-dependency. The calculations show that the brittleness of the material tends to deteriorate the
mesh-dependency problem. However, by using the equivalent geometry modification with adequate parameters, the unwanted mesh-dependency can be satisfactorily corrected. Parametric studies are performed to investigate the influences of the fracture energy and Weibull modulus. It is seen that for a fixed loading speed, the strength of the specimen increases with the fracture energy, but decreases when the material becomes more heterogeneous. The scatter of specimen strengths decreases when the material becomes more ductile. The observed phenomena are explained by the micro-cracking mechanism of ceramics failure. The effect of loading speed is also investigated, significant rate-hardening effect is observed. It is shown that the micro-cracking mechanism, which is different in the dynamic loading case and static loading case, can explain the observed
rate-dependency of the ceramic
tensile strength.
2004 Published by Elsevier Ltd.
Keywords: Dynamic fracture; Ceramics; Stochastic property; Numerical simulation; Micro-cracking mechanism; Mesh-dependency;
Rate-hardening
不要机器回答
三维数值模拟分析,以探讨陶瓷材料的动态拉伸性能,使用显式动力有限元方法和凝聚力元素.一
微开裂模型考虑了内部缺陷随机分布发展.该模型由一个当地的优势Weibull分布,面积和1面改造,对元素的等效几何帐户.分析,以验证在解决网状的依赖,该模型能力的初步计算.
计算结果表明,该材料的脆性趋于恶化
网格依赖性问题.但是,通过使用适当的指标等效几何修改,不想要的网状依赖可以得到圆满解决.参数进行研究调查的断裂能和Weibull模数的影响.它被看作是一个固定的加载速度,与试样的断裂能提高强度,
但下降时,物质变得更加不均匀.试件强度的散射减少,当物质变得韧性.观察到的现象的解释由陶瓷微开裂机制的失败.加载速度的影响进行了研究,重大率硬化效应
观察到.结果表明,微裂缝机制,这是在动态和静态载荷工况的情况不同,可以解释观测到的
率依赖陶瓷
拉伸强度.
2004年由Elsevier出版公司
关键词：动态断裂;陶瓷;随机财产;数值模拟;微裂机制;网格的依赖;
利率硬化
微开裂模型考虑了内部缺陷随机分布发展.该模型由一个当地的优势Weibull分布,面积和1面改造,对元素的等效几何帐户.分析,以验证在解决网状的依赖,该模型能力的初步计算.
计算结果表明,该材料的脆性趋于恶化
网格依赖性问题.但是,通过使用适当的指标等效几何修改,不想要的网状依赖可以得到圆满解决.参数进行研究调查的断裂能和Weibull模数的影响.它被看作是一个固定的加载速度,与试样的断裂能提高强度,
但下降时,物质变得更加不均匀.试件强度的散射减少,当物质变得韧性.观察到的现象的解释由陶瓷微开裂机制的失败.加载速度的影响进行了研究,重大率硬化效应
观察到.结果表明,微裂缝机制,这是在动态和静态载荷工况的情况不同,可以解释观测到的
率依赖陶瓷
拉伸强度.
2004年由Elsevier出版公司
关键词：动态断裂;陶瓷;随机财产;数值模拟;微裂机制;网格的依赖;
利率硬化