(西安交通大學(xué)機(jī)械工程學(xué)院，西安 710049
北京工業(yè)大學(xué)材料科學(xué)與工程學(xué)院，北京 100022)
摘 要: 利用模擬焊接接頭試樣三點(diǎn)彎曲試驗(yàn)的方法，就焊接接頭強(qiáng)度組配對(duì)其斷裂性能的影響進(jìn)行了研究。發(fā)現(xiàn)不同的焊接接頭強(qiáng)度組配對(duì)其斷裂韌性和裂紋擴(kuò)展驅(qū)動(dòng)力有不同程度的影響，在考慮強(qiáng)度組配對(duì)焊接接頭的斷裂性能的影響時(shí)，必須從材料的斷裂韌性變化和裂紋擴(kuò)展驅(qū)動(dòng)力變化的兩個(gè)方面來考慮。
關(guān)鍵字: 裂紋尖端張開位移(CTOD) 三點(diǎn)彎曲 強(qiáng)度組配
（School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China
1 School of Materials Science and Engineering, Beijing Polytechnic University,Beijing 100022, P. R. China）
Abstract:By means of simulated weld joints specimen, the influence of welding strength matching on the fracture property was investigated. It was found that the different strength matching of the welded joints affects both the crack opening driving force and fracture toughness. Both the material fracture toughness and the crack opening driving force must be considered when the influence of welded joint strength matching on the fracture property is analyzed.
Key words: crack tip opening displacement(CTOD) three-point bend specimens strength matching
