中国科技论文
中國科技論文
중국과기논문
Sciencepaper Online
2014年
5期
578-583
,共6页
单位分解%改进无网格法%场变量%I 型裂纹%应力强度因子
單位分解%改進無網格法%場變量%I 型裂紋%應力彊度因子
단위분해%개진무망격법%장변량%I 형렬문%응력강도인자
partition of unity%improved meshless method%field variables%mode I crack%stress intensity factor
结合无网格法（element free galerkin，EFG）和单位分解思想的特点，在不连续位移模式中引入跳跃函数和渐进位移场函数对无网格法进行改进，建立不连续近似函数的离散方程，求解裂尖附近的场变量，研究了改进无网格中参数选取对 I 型裂纹应力强度因子的影响，验证了改进无网格法的可靠性和精确性。
結閤無網格法（element free galerkin，EFG）和單位分解思想的特點，在不連續位移模式中引入跳躍函數和漸進位移場函數對無網格法進行改進，建立不連續近似函數的離散方程，求解裂尖附近的場變量，研究瞭改進無網格中參數選取對 I 型裂紋應力彊度因子的影響，驗證瞭改進無網格法的可靠性和精確性。
결합무망격법（element free galerkin，EFG）화단위분해사상적특점，재불련속위이모식중인입도약함수화점진위이장함수대무망격법진행개진，건립불련속근사함수적리산방정，구해렬첨부근적장변량，연구료개진무망격중삼수선취대 I 형렬문응력강도인자적영향，험증료개진무망격법적가고성화정학성。
Based on the meshless method (element free galerkin,EFG)and the thoughts of partition of unity,jump function and gradual displacement field function in the discontinuous displacement mode are introduced to improve the meshless method.The discrete equation of discrete approximation function is set up to solve the near crack tip field variables.The effect of improved meshless parameters selection on the stress intensity factors of mode I crack is studied,and the reliability and accuracy of the im-proved meshless method have been verified.
