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ABAQUS+UMAT+FORTRAN
ABAQUS中用户材料子程序UMAT的开发主要解决两方面的问题：本构模型的建立和积分算法的选择。
本文主要研究非线性材料的UMAT实现方法，并重点研究其迭代算法部分，目前，用户材料子程序UMAT的迭代算法主要是常刚度法，常刚度法的优点在于算法原理较简单，程序编写较方便，缺点是当遇到复杂非线性材料时，其迭代次数较多，收敛速度也较慢，在这个情况下，本文采取的是一种迭代次数较少且收敛速度较快的切线刚度法，具体就是采用FORTRAN语言编制了基于Von-Mises模型的接口程序,并采用切线刚度算法，通过与ABAQUS自带本构关系计算的结果相比较，验证其正确性。(This paper studies the user subroutine UMAT of ABAQUS development methods, the use of FORTRAN language isotropic hardening material model of the interface program, studied the effects of such material is extremely elastic-plastic constitutive relation method.
This article UMAT tightly around the secondary development of technology, the first principle of its interface detail, and then for the theory of nonlinear finite element incremental stiffness of the regular tangent stiffness method and the theory of algorithms to do an in-depth analysis of deduced a regular tangent stiffness and rigidity of the law of the specific expression of algorithm theory, and then the preparation of the two algorithms, respectively, of the UMAT program, and finally the establishment of a specific model checking, bringing with ABAQUS elasto-plastic constitutive relation of the calculated results compared to verify the correctness of the two.)
- 2020-12-05 21:59:24下载
- 积分：1
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files
说明： 二分法算法文件，龙格库塔法，高斯法，数值计算二分法求解，适用于初学数值计算人群(Dichotomy algorithm file)
- 2020-04-20 20:10:55下载
- 积分：1
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3
说明： 数值分析 显示算法 非线弹性 滞回曲线(Numerical analysis showed that the algorithm the linear elastic hysteresis curve)
- 2012-01-09 16:26:03下载
- 积分：1
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NumericalRecipesinF90
说明： fortran 90 numerical recipes
- 2020-07-10 04:46:47下载
- 积分：1
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Matrix
很好用的有关矩阵的各种操作，包括求逆，特征值，特征向量，svd分解等(good part of the matrix of various operations including inverse, eigenvalues, eigenvectors, svd decomposition, etc.)
- 2020-10-31 16:39:55下载
- 积分：1
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feappv31
feap 有限元程序，国外某大学的开源程序(feap finite element program)
- 2014-01-01 20:10:54下载
- 积分：1
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自控课设
说明： 自动控制原理课程设计，建立倒立摆的非线性数学模型用SIMULINK图形库实现。(The course design of the principle of automatic control and the establishment of the nonlinear mathematical model of the inverted pendulum are realized by the Simulink graphic library.)
- 2020-06-20 12:31:50下载
- 积分：1
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transient-conduction
非定常导热，附件包含3个源代码。分别对应着FTCE、BTCS和紧致格式的程序代码(unsteady conduction)
- 2012-01-01 10:05:22下载
- 积分：1
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water-quality-model
水质模型，用于计算河流下游及河口水环境容量(use for water quality)
- 2016-01-22 16:34:35下载
- 积分：1
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GAUSS-JORDAN
gauss jordan method. not my own program but i just want to share it.
- 2012-09-30 09:32:51下载
- 积分：1
