河海大学学报(自然科学版)
河海大學學報(自然科學版)
하해대학학보(자연과학판)
JOURNAL OF HOHAI UNIVERSITY (NATURAL SCIENCES)
2014年
3期
246-249
,共4页
混凝土%域型裂缝%损伤区域%断裂%扩展角
混凝土%域型裂縫%損傷區域%斷裂%擴展角
혼응토%역형렬봉%손상구역%단렬%확전각
concrete%mode II crack%damage area%fracture%propagation angle
根据Ⅰ型裂缝和Ⅱ型裂缝在损伤与断裂耦合方面的联系,基于Ⅰ型裂缝的损伤方程推导出更适用于Ⅱ型裂缝的损伤演化方程,得到损伤区Ⅱ的计算方法。通过损伤梯度研究Ⅱ型裂缝从损伤至开裂阶段裂缝发展方向的变化规律,最终得到Ⅱ型裂缝的扩展角是79o。将该扩展角与经典判据得到的扩展角进行对比,结果表明该方法是可行的。
根據Ⅰ型裂縫和Ⅱ型裂縫在損傷與斷裂耦閤方麵的聯繫,基于Ⅰ型裂縫的損傷方程推導齣更適用于Ⅱ型裂縫的損傷縯化方程,得到損傷區Ⅱ的計算方法。通過損傷梯度研究Ⅱ型裂縫從損傷至開裂階段裂縫髮展方嚮的變化規律,最終得到Ⅱ型裂縫的擴展角是79o。將該擴展角與經典判據得到的擴展角進行對比,結果錶明該方法是可行的。
근거Ⅰ형렬봉화Ⅱ형렬봉재손상여단렬우합방면적련계,기우Ⅰ형렬봉적손상방정추도출경괄용우Ⅱ형렬봉적손상연화방정,득도손상구Ⅱ적계산방법。통과손상제도연구Ⅱ형렬봉종손상지개렬계단렬봉발전방향적변화규률,최종득도Ⅱ형렬봉적확전각시79o。장해확전각여경전판거득도적확전각진행대비,결과표명해방법시가행적。
According to research on modeⅠand modeIIcrack damage coupled with fractures, a damage evolution equation that is more suitable for mode II cracks was established based on the damage equation of a mode Ⅰcrack. Then, the calculation method for the damage area was obtained. The variation of the direction in which the crack developed was studied using the damage gradient, over a period ranging from damage to cracking of the modeII crack. Finally, the propagation angle of the mode II crack was determined to be 79o. This propagation angle was compared with that obtained by the classic criterion. The results show that the method used in this study is feasible.