3.3材料模型種類及參數(shù)

1、課程回顧維有限元網(wǎng)格分類I邊界形狀Y維 維 線性單元 I二次單元(<)禹昇遷耳號n匸：/ Shenyang Institute of Aeronautical Engineering課程回顧(<)禹昇遷耳號n匸：/ Shenyang Institute of Aeronautical Engineering課程回顧6節(jié)點8節(jié)慮4節(jié)點(<)禹昇遷耳號n匸：/ Shenyang Institute of Aeronautical Engineering課程回顧Ansys網(wǎng)格劃分步驟定義單元類型定義單元屬性定義網(wǎng)格生成控制生成網(wǎng)格實常數(shù) 定義單元屬性I材料特性Shenyang In

2、stitute of Aeronautical Engineering課程回顧Shenyang Institute of Aeronautical Engineering課程回顧MnshTool（網(wǎng)格數(shù)量網(wǎng)格劃分影響因素網(wǎng)格畸形網(wǎng)格布局網(wǎng)格走向網(wǎng)格劃分注意事項避免尖角單元疏密過渡模型建模方法4混合網(wǎng)格劃分實體略去結(jié)構(gòu)細(xì)節(jié)Shenyang Institute of Aeronautical Engineering課程薄殼單元建模注意事項回顧JrJrB2S2 5S £_ caEBSBS9SM5 7Ssi r isn sssszsss «rbrlr h 祈 _ ! s !

3、3; s < lrf *VSS0SSS s s : Fss S3 i ss 5.3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)laipUL0W9Wf fc«4ult «nt *ix>lflcraMnt組.at MdH 55HFT3»fe Level#5S91 _4« 5521>.071e-0012.?6l«»0ei?.<5Te*0M2.149e>QDll.d4?<.0tl.S3$«.oeii.22

4、te*001>.212e-0W.141«.0W3.0?le-0W .OQ»e>O»3.875.4W13.409e*Wl3.1DW12.32Se4Wl1.93BtWl1.550etWl1.163>4M1?.?5OetWt38T5etO.OOOetWtShenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)a) n=0. 1b) n=0. 2Shenyang Institute

5、 of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)node« 35213391 nodo* 55>1.rum A.metWl3. t«etWl 3.412<4M12 幀2.4m*Ml9.74UtWO4. t74etMOShenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)c) n=0. 3d) n=0.4不同硬化指數(shù)時的脹形高度圖材料的力學(xué)性能（或機(jī)械性能）

6、指標(biāo)為彈性模量E:材料抵抗彈性變形的能力強(qiáng)度指標(biāo)CTO屈服強(qiáng)度bys 材料發(fā)生屈服 極限強(qiáng)度5> 材料發(fā)生破壞Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)冒塑性指標(biāo)延伸率6和/或面縮率屮。Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料

7、模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)脆性材料無by »無頸縮，強(qiáng)度指標(biāo)6。 延性材料可以沒有屈服平臺，名義屈服 強(qiáng)度W.2為產(chǎn)生02%塑性應(yīng)變時的應(yīng)力。 彈性階段6臨間也可有非線性關(guān)系。a° 0.20廠£p= 0.2%gShenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)硬鋁 球鐵 青銅 拉伸

8、曲線鑄璃、伸線灰鐵玻鋼拉曲16Mn. A3鋼拉伸曲線Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)延性材料:壓縮與拉伸的曲線 關(guān)于原點對稱。有基本相同的E、Qyso 材料愈壓愈扁，往往測 不出抗壓極限強(qiáng)度。Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)脆性材料:拉、壓縮機(jī)械性能常常有較大的Shenyang Institute of Aeron

9、autical Engineering3.3材料模型種類及參數(shù)區(qū)別，抗壓極限強(qiáng)度»抗拉極限強(qiáng)度。 如鑄鐵、混凝土、石料等。Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)低碳

10、鋼壓縮，愈壓愈扁鑄鐵壓縮，約45。開裂Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)泊松(Poisson)比dIlaz-L泊松效應(yīng)：材料沿加載方向伸長/縮短的同時， 在垂直于加載方向發(fā)生的縮短/伸長現(xiàn)象。Shenyang Institute of Aeronautical Engineering3

11、.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)沿載荷方向（縱向）的應(yīng)變：Ej=AL/ Lo ;垂直于載荷方向（橫向）的應(yīng)變：e2=（d-d0）/d0=-Ad/d0n泊松比V：橫向與縱向應(yīng)變之比的負(fù)值。V=-82/8vZSF =t聚碳酸酯屈服應(yīng)力與溫度.應(yīng)變速度之間關(guān)系400-80 -60 -40 -20020 40 60 80最小應(yīng)變/%2014020806O-006061 T4鋁合金成形極限圖（電液成形）Shenyang Institute of Aeronautical Engineering3.3

12、材料模型種類及參數(shù)真應(yīng)力、真應(yīng)變 工程應(yīng)力S、工程應(yīng)變e:應(yīng)變均勻變形<A = ln(l+)0g = J # = ln(fTnS=F/A0 ； e=AZ/Z0 = (Z-Zo)/o 真應(yīng)力b、置嬴云。關(guān)系：均勻變形，假定體積不變，A0Z0=AZ,則有:誤差:(b S)=es(幺一f) e e一般工程問題：e<0.012 |誤差小，二者可不加區(qū)別q=F/A=FZ/A0Z o=(F/Ao)(Z o+A I)/10=S(l+e) >S1)線彈性模型:a=Ee(a<ab;或bVb )2)非線性彈性模型:a=ken (a<ab; 或bv)03）理想剛塑模型:忽略彈性變形，也

13、不考慮應(yīng)變硬化。 當(dāng) bVbys 時，8=0當(dāng)£>0時，gg4）理想彈塑性模型:線彈性+理想塑性。<J “1廠當(dāng) 8<eys 時，a=Ee當(dāng) 8>£ys 時，a=ays=E£ys/(s<sys)01>£主要內(nèi)容T解ANS YS/LS-D YNA材料模型掌握特定材料模型的應(yīng)用ANSYS網(wǎng)格劃分方法及特點學(xué)會定義材料模型各參數(shù)屬性Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)自定義材料模型應(yīng)力應(yīng)變曲線的輸入;應(yīng)力應(yīng)變曲線的添加;應(yīng)力應(yīng)變的列表;應(yīng)力應(yīng)變的

14、顯示;材料應(yīng)力與應(yīng)變曲線00.050.10.150.200.250.300.350.400.450206302341363384396407417420禹拜k乍吃號TtShenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)禹拜k乍吃號TtShenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)用命令定義材料模型raterial Models Available非線性FavoritesS-OYNA材料模型結(jié)合狀態(tài)方程定義離散單位模型 Linear|莎 NonlinearI f

15、oB Equation of StateDiscrete Element Propertieh Rigid Material丄禹拜k乍吃號TtShenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)禹拜k乍吃號TtShenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)彈性材料非線無彈性材料材料模型 泡沫材料狀態(tài)方程I剛性材料廣各向同性正交各向異性禹拜k乍吃號TtShenyang Institute of Aeronautical Engineering3.3材料模型種類及參

16、數(shù)，線彈性彈性材料I非線彈性V各向異性 流體彈性Blatz-K o 模型 Mooney-Rivlin 模型禹拜k乍吃號TtShenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)禹拜k乍吃號TtShenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Viscoelastic 模型禹拜k乍吃號TtShenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)G3 Linear Orthotropic Properties f

17、or Mate. ><Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù) KCancelHelp各向同性Linear Orthotropi匚Material Properties for Material Number 1OK I Cancell HelpH Linear Isotropic Properties for Mated. XJLinear Isotropic Material Proper

18、ties for Material Number 1DENSEXNUXYShenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)正交各向異性Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)常用材料的彈性模量及泊松比名稱彈性模量E/GPa切變模量G/GPa泊松比P灰、白口鑄鐵115160450. 230 27球墨鑄鐵160610. 250 29碳鋼2002

19、20810. 24-0. 28合金鋼210810. 2503鑄鋼17570-840. 25-0. 29硬鋁合金7127冷拔黃銅91 9935-370. 320 42軋制純銅110400. 31 0. 34軋制鋅84320. 27軋制鋁6926-270. 320 36鉛1770.42Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)各向異性矩陣常數(shù)可由(Ex, Gxy, Uxy)換算得到1=Ey,Shenyang I

20、nstitute of Aeronautical Engineering3.3材料模型種類及參數(shù)K =流體彈性主要用于模擬動態(tài)沖擊下的盛滿流體的容器Bulk ModulusShenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)BLatz-K o 模型Mooney Rivlin 模型Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Ins

21、titute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)DENSGXYBlatz-KO Material Properties for Material Number 1OK I CancelHelpDENSMUXYCfLO)C01)OKCancel |Help1Shenyang Institute of Aeronautical

22、 Engineering3.3材料模型種類及參數(shù)C01和CIO為M R常數(shù) 互.=2( C oi+ C io> 3CoEq = 6 Coifl + )與應(yīng)變速率無關(guān)的各向同性材料非線性無彈性材料模型$與應(yīng)變速率有關(guān)的各向同性材料與應(yīng)變速率有關(guān)的各向異性材料 r經(jīng)典雙線性隨動硬化(BKIN)與應(yīng)變率無關(guān)的各向同性2經(jīng)典雙線性各向同性硬化(BISO)與溫度有關(guān)的雙線性各向同性Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模

23、型種類及參數(shù)02Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)主應(yīng)力空間中的Mises屈服準(zhǔn)則Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineeri

24、ng3.3材料模型種類及參數(shù)等向強(qiáng)化屈服面變化隨動強(qiáng)化屈刀艮面變化Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)混合強(qiáng)化屈服面變化Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)經(jīng)典雙線性隨動硬化（BKIN）采用兩個斜率（彈性斜率

25、和塑性斜率）描述材料應(yīng)力與應(yīng)變特征雙線性隨動應(yīng)化材料模型經(jīng)典雙線性各向同性硬化(BISO)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Bilinear Isotropic Material Properties for Material FMumber 1KCancelHelpShenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)與溫度有關(guān)的雙線性

26、各向同性Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)Shenyang Institute of Aeronautical Engineering3.3材料模型種類及參數(shù)尸隨動塑性材料模型與應(yīng)變速率有關(guān)各向同性材料y Rate Dependent材料模型< Powerlaw材料模型隨動塑性材料模型是各向同性和隨動硬化的混合模型Plastic Kinematic Properties for Mate. X

27、aY = 1+（|P 他+吟鄲）匚-Etmri E 匕卩一二匚 tanPlastic Kinematic Material Properties for Material Numbec 1c、p是應(yīng)變常數(shù)CancelOK幕指數(shù)塑性模型 Power Law Plasticity Model咕 u Ip k®+首y£ 應(yīng)變速率，C 和P Cowper-Symonds應(yīng)變率參數(shù), 乞一即將屈服時的彈性應(yīng)變， 8ef 等效塑性應(yīng)變， k 強(qiáng)化系數(shù)，Power Law Material Properties for Material Number 1Cancel彈性模量" E (Pa卜淚松比卩密度* p (kgyin5)強(qiáng)化系數(shù)硬化系數(shù)YIQ應(yīng)變率參數(shù)Ca(s-1>應(yīng)變率參數(shù)P "69 eS033心2720.598430.216<36500348HelpAluminum： 1100n 一硬化系數(shù)應(yīng)變率相關(guān)的塑性模型 Strain Ra