The Discontinuous Higher Order Fields for Anti-Plane Crack at Interface

2008 ◽  
Vol 47-50 ◽  
pp. 1027-1030 ◽  
Author(s):  
Yao Dai ◽  
Shi Min Li ◽  
Wei Tan
Keyword(s):  
Asymptotic Analysis ◽  
Plane Problem ◽  
Theoretical Basis ◽  
Engineering Application ◽  
Higher Order ◽  
High Order ◽  
Weak Discontinuity ◽  
Plane Crack ◽  
Crack Problems ◽  
Homogeneous Materials

The high order discontinuous asymptotic fields similar to the Williams’ solutions to crack problems in homogeneous materials are obtained by asymptotic analysis for an anti-plane problem in non-homogeneous materials and the crack at the physical weak-discontinuous interface. These results provide a theoretical basis for engineering application of weak-discontinuity fracture.

The Higher Order Asymptotic Fields for Plane Interfacial Crack with Physical Weak-Discontinuity

2011 ◽  
Vol 217-218 ◽  
pp. 1314-1318
Author(s):  
Yao Dai ◽  
Lei Zhang ◽  
Peng Zhang ◽  
Jun Feng Liu
Keyword(s):  
Experimental Investigation ◽  
Numerical Analysis ◽  
Asymptotic Analysis ◽  
Theoretical Basis ◽  
Engineering Application ◽  
Interfacial Crack ◽  
Higher Order ◽  
Weak Discontinuity ◽  
Displacement Method ◽  
Asymptotic Fields

The higher order discontinuous asymptotic fields which are similar to the Williams’ solutions of homogenous material are obtained by the displacement method and asymptotic analysis for a plane crack at the physical weak-discontinuous interface in non-homogeneous materials. The results provide a theoretical basis for the numerical analysis, experimental investigation and the engineering application of physical weak-discontinuous fracture.

The Higher Order Crack Tip Fields for Physical Weak-- Discontinuous Crack of FGM Plate with Reissner’s Effect

2013 ◽  
Vol 664 ◽  
pp. 841-845
Author(s):  
Yao Dai ◽  
Xiao Chong
Keyword(s):  
Engineering Application ◽  
Interfacial Crack ◽  
Crack Tip ◽  
Expansion Method ◽  
Higher Order ◽  
Functionally Graded ◽  
Homogeneous Material ◽  
Graded Materials ◽  
Crack Problems ◽  
Asymptotic Expansion Method

The physical weak-discontinuous problem of an interfacial crack between homogeneous material and functionally graded materials (FGMs) is studied based on Reissner’s plates considering transverse shear deformation effect. The crack-tip higher order asymptotic fields of homogeneous materials and FGMs regions are obtained by the asymptotic expansion method, respectively. Finally, the whole crack tip high order fields are assembled and given. The results provide a theoretical basis for solving interfacial crack problems of FGMs plates and their engineering application.

The eigen-functions of anti-plane crack problems in non-homogeneous materials

2012 ◽  
Vol 42 (8) ◽  
pp. 852-860 ◽  
Author(s):  
Peng ZHANG ◽  
Yao DAI ◽  
ShiMin LI ◽  
JunFeng LIU ◽  
Lei ZHANG ◽  
...  
Keyword(s):  
Plane Crack ◽  
Crack Problems ◽  
Homogeneous Materials

The Higher Order Asymptotic Crack-Tip Field for Reissner’s Linear Functionally Graded Shell

2012 ◽  
Vol 549 ◽  
pp. 826-829
Author(s):  
Yao Dai ◽  
Lei Zhang ◽  
Jun Feng Liu ◽  
Xiao Chong ◽  
Hong Qian Chen
Keyword(s):  
Experimental Investigation ◽  
Engineering Application ◽  
Crack Tip ◽  
Expansion Method ◽  
Higher Order ◽  
Functionally Graded ◽  
Crack Tip Field ◽  
Crack Problems ◽  
Asymptotic Expansion Method ◽  
Functionally Graded Shell

The eigen-problem of a crack in functionally graded Reissner’s spherical shell is analyzed. By adopting the asymptotic expansion method, the higher order crack tip asymptotic fields which are similar to the Williams’ solutions of plane crack problems in homogenous materials are obtained. The grade direction is assumed to be parallel to the crack. The results can be widely adopted in numerical analysis, experimental investigation and the engineering application of FGM shell structure.

VERY HIGH-ORDER SPATIALLY IMPLICIT SCHEMES FOR COMPUTATIONAL ACOUSTICS ON CURVILINEAR MESHES

2001 ◽  
Vol 09 (04) ◽  
pp. 1259-1286 ◽  
Author(s):  
MIGUEL R. VISBAL ◽  
DATTA V. GAITONDE
Keyword(s):  
Three Dimensional ◽  
Radiation Condition ◽  
Higher Order ◽  
High Order ◽  
High Frequencies ◽  
Decomposition Strategies ◽  
The Impact ◽  
Spurious Modes ◽  
Very High ◽  
Computational Strategy

A high-order compact-differencing and filtering algorithm, coupled with the classical fourth-order Runge–Kutta scheme, is developed and implemented to simulate aeroacoustic phenomena on curvilinear geometries. Several issues pertinent to the use of such schemes are addressed. The impact of mesh stretching in the generation of high-frequency spurious modes is examined and the need for a discriminating higher-order filter procedure is established and resolved. The incorporation of these filtering techniques also permits a robust treatment of outflow radiation condition by taking advantage of energy transfer to high-frequencies caused by rapid mesh stretching. For conditions on the scatterer, higher-order one-sided filter treatments are shown to be superior in terms of accuracy and stability compared to standard explicit variations. Computations demonstrate that these algorithmic components are also crucial to the success of interface treatments created in multi-domain and domain-decomposition strategies. For three-dimensional computations, special metric relations are employed to assure the fidelity of the scheme in highly curvilinear meshes. A variety of problems, including several benchmark computations, demonstrate the success of the overall computational strategy.

scholarly journals WORKSHOP PENGEMBANGAN SOAL HIGHER ORDER THINKING SKILL (HOTS) BAGI GURU-GURU MGMP IPS KABUPATEN MALANG PELATIHAN PENYUSUNAN

2018 ◽  
pp. 73
Author(s):  
Neni Wahyuningtyas ◽  
Nurul Ratnawati
Keyword(s):  
Higher Order Thinking ◽  
Higher Order ◽  
High Order ◽  
Thinking Skill ◽  
High Order Thinking Skill ◽  
High Order Thinking

Beberapa penelitian menunjukkan bahwa kompetensi pedagogik guru pada aspek pengembangan evaluasi hasil belajar masih bersifat konvesional. Maka dari itu, pengabdian di masyarakat yang dilakukan berasaskan pada tujuan meningkatkan kemampuan guru dalam membuat soal yang dapat mendorong siswa untuk memiliki kemampuan menganalisis (C4), mengevaluasi (C5), dan mencipta (C6). Program yang dijalankan yaitu Pelatihan Penyusunan Soal High Order Thinking Skill (HOTS) bagi GuruGuru MGMP IPS Kabupaten Malang. Metode pelaksanaan kegiatan pengabdian ini adalah dengan mengungkap permasalahan yang muncul dikalangan para guru, kemudian dilakukan diskusi pengusul bersama mitra untuk merumuskan akar masalah prioritas yang disepakati, serta menentukan solusi yang tepat. Namun sebelum dilakukan diskusi atau pelatihan, terlebih dahulu pengusul melakukan koordinasi dengan guru-guru MGMP IPS Kabupaten Malang, koordinasi berkaitan dengan kegiatan sosialiasi. Keseluruhan kegiatan pengabdian masyarakat ini dapat dikatakan berhasil, meskipun belum semua peserta pendampingan menguasai cara menyusun soal HOTS.

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