本文選題：數(shù)字圖像相關(guān) + 子區(qū)域　； 參考：《工程力學(xué)》2017年10期

【摘要】：正交各向異性材料剛度矩陣隨坐標(biāo)系轉(zhuǎn)動(dòng)而變化,虛場(chǎng)方法中虛位移場(chǎng)的定義與數(shù)據(jù)點(diǎn)坐標(biāo)有關(guān),常用的基于參考構(gòu)形全局坐標(biāo)系的虛場(chǎng)方法直接忽略了變形過(guò)程中數(shù)據(jù)點(diǎn)的移動(dòng)和材料坐標(biāo)系轉(zhuǎn)動(dòng),這樣即使在彈性變形這樣的小變形條件下也將導(dǎo)致材料力學(xué)參數(shù)識(shí)別結(jié)果不準(zhǔn)確。針對(duì)上述問(wèn)題該文提出用基于當(dāng)前構(gòu)形的虛場(chǎng)方法識(shí)別正交各向異性材料彈性力學(xué)參數(shù),并用模擬試驗(yàn)驗(yàn)證了該方法的可靠性;定量地分析了數(shù)據(jù)點(diǎn)移動(dòng)和轉(zhuǎn)動(dòng)對(duì)力學(xué)性能參數(shù)識(shí)別結(jié)果的影響,結(jié)果表明基于當(dāng)前構(gòu)形虛場(chǎng)方法,能夠提高參數(shù)Q12、Q22識(shí)別的準(zhǔn)確性。
[Abstract]:The stiffness matrix of the orthotropic material varies with the rotating coordinate system, virtual field method in virtual displacement coordinate definition and data field, the commonly used method of virtual field reference configuration of the global coordinate system based on direct data points neglected during the deformation of material moving and rotating coordinate system, so that even in the elastic deformation under the condition of small deformation this will also lead to material mechanics parameter identification results are not accurate. In order to solve the above problems this paper presents the current configuration of virtual field identification method of orthotropic elastic mechanical parameters based on shape, and the reliability of the method was verified by simulation test; the effects of data points moving and rotating on the results of mechanical parameter identification the performance of the quantitative analysis, the results show that the current configuration of virtual field based method can improve the accuracy of parameter Q12, Q22 recognition.

【作者單位】： 北京航空航天大學(xué)固體力學(xué)所;清華大學(xué)汽車工程系汽車安全與節(jié)能國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(11272032,11322220,11427802) 北京市科技新星計(jì)劃項(xiàng)目(xx2014B034) 汽車安全與節(jié)能國(guó)家重點(diǎn)實(shí)驗(yàn)室開(kāi)放基金項(xiàng)目(KF16162)
【分類號(hào)】：TB30

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