A Direct Modification Method for Strains due to Non-conforming Modes
A Direct Modification Method for Strains due to Non-conforming Modes
复制标题
非一致模态应变的直接修正方法
DOI：
10.12989/sem.2001.11.3.325
复制
发表时间：
2001
影响因子：
2.2
通讯作者：
Tae
中科院分区：
文献类型：
--
作者：
Chang;Keun;Tae
本文提出了一种有效的修改方法，消除各种不合格模式引起的应变不良影响，使不合格元件无条件通过斑贴测试。该方案被纳入单元公式中，以建立新型非相容六面体单元，分别指定为常规单元和可变节点单元的 NHx 和 NVHx。非相容位移模式有选择地添加到普通（相容）单元位移假设中，以改善扭曲实体单元的弯曲行为。为了验证所提出的直接修改方法的有效性和单元行为的改进，进行了多次数值试验。测试结果表明，该方法是有效的，应用于非合格实体单元保证了单元通过补丁测试。
This paper addresses an efficient modification method that eliminates the undesirable effects of strains due to various non-conforming modes so that the non-conforming element can pass the patch test unconditionally. The scheme is incorporated in the element formulation to establish new types of non-conforming hexahedral elements designated as NHx and NVHx for the regular element and variable node element, respectively. Non-conforming displacement modes are selectively added to the ordinary (conforming) element displacement assumptions to improve the bending behavior of the distorted solid element. To verify the validation of proposed direct modification method and the improvement of element behavior, several numerical tests are carried out. Test results show that the proposed method is effective and its applications to non-conforming solid elements guarantee for the element to pass the patch test.