Example3-2:The flexural strength of a fiber-reinforced composite is 315MPa,and the flexural modulus is 124GPa.A specimen,which is 12mm wide,9.5mm high and 200mm long,is supported at ends with two rods which are 125mm apart.Calculate the force required to fracture the material and the deflection of the sample at fracture,assuming that no plastic deformation occurs. 3FL tr flexural strength= 2wh2 flexural modulus 4wh'8 PDF文件使用"pdfFactory Pro”试用版本创建ww,fineprint..com,cn
Example3-2：The flexural strength of a fiber-reinforced composite is 315MPa, and the flexural modulus is 124GPa. A specimen, which is 12mm wide, 9.5mm high and 200mm long, is supported at ends with two rods which are 125mm apart. Calculate the force required to fracture the material and the deflection of the sample at fracture, assuming that no plastic deformation occurs. flexural strength ＝ 2 flexural modulus ＝ 2 3 wh FL d 3 2 4wh L F PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn
Solution: flexural strength equation: 3FL 3F×125 315= 0.173F 2wh 2×12×9.5 F= 315 =1819N 0.173 flexural modulus equation: CF 125×1819 124×10°= 4whδ 4×12×9.5δ δ=0.7mm PDF文件使用"pdfFactory Pro'”试用版本创建wm,fineprint.com,cn
Solution： flexural strength equation ： F N F F wh FL 1819 0.173 315 0.173 2 12 9.5 3 125 2 3 315 2 2 = = = ´ ´ ´ = = flexural modulus equation： mm wh L F 0.7 4 12 9.5 125 1819 4 124 10 3 3 3 2 3 = ´ ´ ´ ´ = = d d d PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn
3.2.4 Toughness Rupture Using stress-strain edW (SSa.nS diagram to characterize toughness Strain (8)m/m Toughness unit J/m3 PDF文件使用"pdfFactory Pro”试用版本创建w,fineprint..com,cn
3.2.4 Toughness S t r e s s ( s ) M P a Strain (e) m/m Rupture Toughness unit J/m3 Using stress-strain diagram to characterize toughness PDF 文件使用 "pdfFactory Pro" 试用版本创建 ÿwww.fineprint.com.cn Ì
Scale Hammer Specimen Drop hammer testing Impact Impact tester Strength Specimen Specimen Impact Impact Charpy impact testing Izod impact testing PDF文件使用"pdfFactory Pro'”试用版本创建f继ifineprint.com,cn
Specimen Impact Specimen Impact Specimen Drop hammer testing Scale Hammer Izod impact testing Charpy impact testing Impact tester Impact Strength PDF 文件使用 "pdfFactory Pro" 试用版本创建 fwww.fineprint.com.cn 昳ÿ
Ductile to Brittle Transition (DBT) Transition temperature range +一Ductile failures Mixed failures→ Brittle failures Temperature PDF文件使用"pdfFactory Pro”试用版本创建w,fineprint..com,cn
Ductile to Brittle Transition (DBT) E n e r g y t o r u p t u r e E n e r g y t o r u p t u r e Brittle failures Mixed failures Ductile failures Temperature Transition temperature range PDF 文件使用 "pdfFactory Pro" 试用版本创建 3www.fineprint.com.cn 3