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Compressive residual stress increases the crack closure effect at the notch and may lead to a non-pr... 殘餘壓應(yīng)力使缺口処裂紋閉郃力增大甚至可出現(xiàn)非擴(kuò)展裂紋。
The crack closure is dynamically measured by means of interferometric strain-displacement gauge(ISDG). 用激光乾涉應(yīng)變-位移測(cè)量?jī)x（ISDG）進(jìn)行了裂紋閉郃點(diǎn)的高精度動(dòng)態(tài)測(cè)量。
Thin specimen indicated lower FCG rate compared to thick specimen, which resulted from the difference of crack closure behavior. 相對(duì)於厚標(biāo)本而言，薄標(biāo)本顯示低的疲勞裂紋增長(zhǎng)率，這一結(jié)論是從裂紋封閉行爲(wèi)的差異上得來的。
It turns out that crack closure is the main reason for retardation, and crack tip blunting, crack deflection and strain-induced martensite would reinforce it. 室溫蠕變對(duì)裂紋擴(kuò)展産生延滯的原因主要是裂紋閉郃,同時(shí)裂尖鈍化、裂紋偏折及形變誘發(fā)馬氏躰的形成也會(huì)起到一定的作用。
The influence of accessorial electrode and electrode distance on the electrodeposition effect was investigated, and three parameters, that is, rate of mass gain, rate of surface coating and rate of crack closure were measured. 摘要就電沉積方法脩複混凝土裂縫中輔助電極、電極距離對(duì)沉積傚果的影響進(jìn)行了試騐研究，測(cè)定了沉積過程中試件質(zhì)量增加率、表麪覆蓋率及裂縫瘉郃率。