In this paper, we consider the mixed finite element method (MFEM) of the elasticity problem in two and three dimensions (2D and 3D). We develop a new residual based stabilization method to overcome the inf-sup difficulty, and use Langrange elements to approximate the stress and displacement. The new method is unconditionally stable, and its stability can be obtained directly from Cea's lemma. Optimal error estimates for the H-1-norm of the displacement and H(div)-norm of the stress can be obtained at the same time. Numerical results show the excellent stability and accuracy of the new method.
机构:
Zhengzhou Univ Light Ind, Coll Math & Informat Sci, Zhengzhou 450002, Peoples R ChinaZhengzhou Univ Light Ind, Coll Math & Informat Sci, Zhengzhou 450002, Peoples R China
Li, Zhenzhen
Chen, Shaochun
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Zhengzhou Univ, Sch Math & Stat, Zhengzhou 450001, Peoples R ChinaZhengzhou Univ Light Ind, Coll Math & Informat Sci, Zhengzhou 450002, Peoples R China
Chen, Shaochun
Qu, Shuanghong
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Zhengzhou Univ Light Ind, Coll Math & Informat Sci, Zhengzhou 450002, Peoples R ChinaZhengzhou Univ Light Ind, Coll Math & Informat Sci, Zhengzhou 450002, Peoples R China
Qu, Shuanghong
Li, Minghao
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机构:
Henan Univ Technol, Coll Sci, Zhengzhou 450001, Peoples R ChinaZhengzhou Univ Light Ind, Coll Math & Informat Sci, Zhengzhou 450002, Peoples R China
机构:
Peking Univ, LMAM, Beijing 100871, Peoples R China
Peking Univ, Sch Math Sci, Beijing 100871, Peoples R ChinaPeking Univ, LMAM, Beijing 100871, Peoples R China
Hu, Jun
Ma, Rui
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机构:
Peking Univ, LMAM, Beijing 100871, Peoples R China
Peking Univ, Sch Math Sci, Beijing 100871, Peoples R ChinaPeking Univ, LMAM, Beijing 100871, Peoples R China
机构:
PetroChina, Res Inst Petr Explorat & Dev, Beijing, Peoples R China
CNPC, Key Lab Nano Chem, Beijing 100083, Peoples R ChinaPetroChina, Res Inst Petr Explorat & Dev, Beijing, Peoples R China
Geng Xiangfei
Peng Baoliang
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PetroChina, Res Inst Petr Explorat & Dev, Beijing, Peoples R China
CNPC, Key Lab Nano Chem, Beijing 100083, Peoples R ChinaPetroChina, Res Inst Petr Explorat & Dev, Beijing, Peoples R China
Peng Baoliang
Ding Bin
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PetroChina, Res Inst Petr Explorat & Dev, Beijing, Peoples R China
CNPC, Key Lab Nano Chem, Beijing 100083, Peoples R ChinaPetroChina, Res Inst Petr Explorat & Dev, Beijing, Peoples R China
Ding Bin
Luo Jianhui
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PetroChina, Res Inst Petr Explorat & Dev, Beijing, Peoples R China
CNPC, Key Lab Nano Chem, Beijing 100083, Peoples R ChinaPetroChina, Res Inst Petr Explorat & Dev, Beijing, Peoples R China
Luo Jianhui
He Lipeng
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PetroChina, Res Inst Petr Explorat & Dev, Beijing, Peoples R China
CNPC, Key Lab Nano Chem, Beijing 100083, Peoples R ChinaPetroChina, Res Inst Petr Explorat & Dev, Beijing, Peoples R China