【摘要】：以十字形焊接節(jié)點(diǎn)為研究對(duì)象,比較ABAQUS、FRANC3D和規(guī)范公式計(jì)算表面裂紋應(yīng)力強(qiáng)度因子的結(jié)果,驗(yàn)證FRANC3D計(jì)算應(yīng)力強(qiáng)度因子的正確性和高效性。為從數(shù)值理論上研究復(fù)雜應(yīng)力場(chǎng)下焊接節(jié)點(diǎn)表面裂紋復(fù)合型應(yīng)力強(qiáng)度因子的影響因素,基于FRANC3D建立不同裂紋形狀比和焊縫傾斜角度的計(jì)算模型。結(jié)果表明:隨著焊縫傾斜角度的增大,Ⅰ型和Ⅲ型應(yīng)力強(qiáng)度因子減小,Ⅱ型應(yīng)力強(qiáng)度因子增大;當(dāng)焊縫傾斜角度為0°和15°時(shí),裂紋表面點(diǎn)和最深點(diǎn)同時(shí)可以忽略Ⅱ型和Ⅲ型應(yīng)力強(qiáng)度因子的影響;應(yīng)考慮Ⅱ型和Ⅲ型應(yīng)力強(qiáng)度因子絕對(duì)值對(duì)疲勞裂紋擴(kuò)展的影響。
[Abstract]:The results of calculation of surface crack stress intensity factor by Abaqus FRANC3D and the standard formula are compared with the cross welded joints. The correctness and efficiency of the calculation of the stress intensity factor by FRANC3D are verified. In order to study the influence factors of composite mode stress intensity factor of welded joint surface crack under complex stress field in numerical theory, the calculation model of different crack shape ratio and weld inclination angle is established based on FRANC3D. The results show that the stress intensity factor of type 鈪，

本文編號(hào)：2197105