第57回構造強度に関する講演会講演集 2015年8月5日～7日 岡山理科大学 1B12 JSASS-2015-3028 ㉸㧗㏿⾪✺ࡢCFRPࡽࡢࢪ࢙ࢡࢱࢧࢬ ࠼ࡿ㣕⩧య┤ᚄࡢᙳ㡪 ۑす⏣ᨻᘯ㸪ᡞ㇂୍㈗㸦ྡᕤ㸧 ᯘᾈ୍㸦㫽⩚ၟ⯪㧗ᑓ㸧 ᮾฟ┿㸦JAXA㸧 Effects of Projectile Diameter on Ejecta Size from CFRP due to Hypervelocity Impact Masahiro Nishida, Kazuki Toya, Koichi Hayashi and Masumi Higashide Key Words: Composite Materials, Environment, Hypervelocity Impact, Space Debris, Size Distribution Abstract The usage of CFRP plates in satellites has been increasing and several attempts have been reported concerning the size distribution of fragments from projectile and materials ejected from target when projectiles struck CFRP plates. However, the size distributions of fragments and ejecta have not yet been fully elucidated. We examined the effects of CFRP target thickness on the size distributions of ejecta. Quasi-isotropic CFRP plates [+45º/0º/-45º/90º]S (8 ply) was used as CFRP targets. Spherical projectiles made of aluminum alloy 2017-T4 with diameter of 1.6 mm to 7 mm were used. Impact experiments were carried out using a two-stage, light-gas gun at Nagoya Institute of Technology. The ejecta collected from front side and rear side of the target were examined. 㸯㸬ࡣࡌࡵ Ᏹᐂ✵㛫ࡣ㸪ከࡃࡢேᕤ⾨ᫍࡀ✌ാࡋ࡚࠾ࡾ㸪Ẽ㇟ࡢ ほ ࡸ㟁Ἴࡢཷಙ࡞᪥ᖖ⏕άᵝࠎ࡞ᜠᜨࢆࡶࡓࡽࡋ࡚ ࠸ࡿ㸬୍᪉㸪ᙺࢆ⤊࠼ࡓேᕤ⾨ᫍࡣᏱᐂ✵㛫␃ࡲࡾ⥆ ࡅࡿ㸬2010ᖺࡢESA ࡼࡿᅜ㐃࣭Ᏹᐂ✵㛫ᖹ⏝ጤဨ ࡛ࡢሗ࿌ 1)࡛ࡣࠊᆅୖࡽほ ࡛ࡁࡿ≀యࡢ࠺ࡕ59 %ࡀ◚ ○◚∦㸪16 %ࡀᨺᲠࡉࢀࡓ⾨ᫍ㸪12 %ࡀᨺᲠࡉࢀࡓࣟࢣࢵ ࢺ㸪7 %ࡀᨺฟࡉࢀࡓ㒊ရ࡛㸪ṧࡾࡢ6 %ࡀ㐠⏝୰ࡢ⾨࡛ᫍ ࠶ࡿ㸬ࡇࡢࡼ࠺㸪Ᏹᐂ✵㛫Ꮡᅾࡍࡿ≀యࡢከࡃࡣᏱᐂ ࢦ࣑㸦ࢫ࣮࣌ࢫࢹࣈࣜ㸧࡛࠶ࡿ㸬ࡉࡽ㸪ࡑࢀࡽᏱᐂࢦ࣑ ࡢ㏿ᗘࡣ㧗㏿࡛࠶ࡿࡓࡵ㸪ேᕤ⾨ᫍ࡞ࡢᏱᐂᶵ࡞㉸ 㧗㏿⾪✺ 2)ࡋ㸪ࡑࡢᄇฟ≀㸦ࢪ࢙ࢡࢱ㸧ࡣ᪂ࡓ࡞Ᏹᐂࢦ ࣑㸦ḟࢹࣈࣜ㸧࡞ࡿࡓࡵ㸪Ᏹᐂࢦ࣑ࡣ㝈ࡾ࡞ࡃቑ࠼࡚ ࠸ࡃ㸬ࢪ࢙ࢡࢱࡣᚤᑠ࡞ࡶࡢࡀከ࠸ࡀ㸪ࡑࡢ㏿ᗘࡣ㧗㏿ ࡛࠶ࡿࡓࡵ㸪 ኴ㝧㟁ụ 3)ࡸ࣮࣡ࣖࣁ࣮ࢿࢫ 4)࡞ࢆ◚ᦆࡉ ࡏ㸪ࡁ࡞⿕ᐖࢆࡶࡓࡽࡍྍ⬟ᛶࡀ࠶ࡿ㸬ࡑࡢࡓࡵ㸪⾪✺ Ⓨ⏕ࡍࡿࢪ࢙ࢡࢱࡘ࠸࡚ヲࡋࡃㄪࡿᚲせࡀ࠶ࡿࠋ ᮏ◊✲࡛ࡣⅣ⣲⧄⥔ᙉࣉࣛࢫࢳࢵࢡᯈ㸦CFRP㸧㣕⩧య ࢆ㉸㧗㏿࡛⾪✺ࡉࡏࠊࡑࡢⓎ⏕ࡍࡿࢪ࢙ࢡࢱࡢࡁ ࡉࢆ ᐃࡋ㸪≉㸪㣕⩧య┤ᚄࡢᙳ㡪ࢆ⪃ᐹࡋࡓ㸬 㸰㸬ᐇ㦂᪉ἲ ᮏ◊✲ᐊᡤ᭷ࡢẁᘧ㍍࢞ࢫ㖠ࢆ⏝࠸࡚㸪㉸㧗㏿⾪✺ᐇ 㦂ࢆ⾜ࡗࡓ㸬ࢱ࣮ࢤࢵࢺࡣ✚ᒙᵓᡂࡀ[+45° /0° /-45° /90° ]S㸦8ply㸪ཌࡉ1.2 mm㸧࡞ࡿࡼ࠺✚ᒙࡋࡓCFRP㸦ᮾ 㑥ࢸࢼࢵࢡࢫᰴᘧ♫㸪IMS60/133㸧ࢆ⏝࠸ࡓ㸬ࡇࢀࡣ୍ ᪉ྥᮦࢆఝ➼᪉✚ᒙࡋࡓᯈ࡛࠶ࡾ㸪ࢧࢬࡣ150 mm ×100 mm࡛࠶ࡿ㸬ࡇࢀࡽࡢࢱ࣮ࢤࢵࢺ㸪┤ᚄ1.6 mmࡽ7 mmࡢ㣕⩧య㸦࣑ࣝࢽ࣒࢘ྜ㔠A2017-T4㸧ࢆ⣙3.5 km/s࡛ ⾪✺ࡉࡏࡓ㸬ᅗ㸯♧ࡍࡼ࠺㸪ࢱ࣮ࢤࢵࢺࡽ๓᪉ᚋ ᪉100 mmࡢ⨨ࢪ࢙ࢡࢱࡢᄇฟ㡿ᇦࢆㄪࡿࡓࡵࡢ ᳨ドᯈ㸦㣕⩧యࡀ㏻ࡾᢤࡅࡿࡓࡵࡢ┤ᚄ25 mm ࡢ✰ࢆ࠶ࡅ ࡓ㖡ᯈ C1100P-1/4H㸪ࢧࢬ 200 mm ×200 mm ×2 mm㸧ࢆ タ⨨ࡋࡓ㸬ࡲࡓ㸪ࢱ࣮ࢤࢵࢺࡢ๓᪉ᚋ᪉ᄇฟࡋࡓࢪ ࢙ࢡࢱࢆศࡅ࡚ᅇࡍࡿࡓࡵࢱ࣮ࢤࢵࢺࡢᚋ᪉ᐜჾࢆ タ⨨ࡋࡓ㸬ᅇࡋࡓࢪ࢙ࢡࢱࡢࡁࡉࡣ㸪⏬ീゎᯒࢯࣇ ࢺ㸦ImageJ㸧ࢆ⏝࠸࡚ ᐃࡋࡓ㸬ࢪ࢙ࢡࢱࡢᑍἲࡣ㸪ᅗ 㸰♧ࡍࡼ࠺㸪㛗ࡉࢆ a㸪ᖜࢆ b㸪ཌࡉࢆ cᐃ⩏ 5)ࡋ ࡓ㸬 － 73 － ᅗ㸯 ᐇ㦂⨨ 日本航空宇宙学会 第57回構造強度に関する講演会講演集 2015年8月5日～7日 岡山理科大学 JSASS-2015-3028 㸲㸬ࡲࡵ CFRPࢱ࣮ࢤࢵࢺ㸪┤ᚄࡢ␗࡞ࡿ㣕⩧యࢆ⾪✺㏿ᗘ⣙ 3.5 km/s࡛⾪✺ࡉࡏࡓ㸬๓᪉ࡢࢪ࢙ࢡࢱࡣ㸪㣕⩧యࡢ┤ ᚄࡀࡁࡃ࡞ࡿࡘ࠸࡚㸪᭱ࢪ࢙ࢡࢱ㛗ࡉࡀࡁࡃ࡞ ࡾ㸪⣼✚ಶᩘࡶከࡃ࡞ࡗࡓ㸬ࡋࡋ㸪ᚋ᪉ࡢࢪ࢙ࢡࢱ ࡣ㸪࠶ࡲࡾ᫂☜࡞ഴྥࡀぢࡽࢀࡎ㸪ᚋ᳨ウࡀᚲせ࡛࠶ ࡿ㸬 Thickness, c Length, a Width, b ᅗ㸰 ࢪ࢙ࢡࢱࢧࢬࡢᐃ⩏ 5) 㸱㸬ᐇ㦂⤖ᯝ ᅇࡋࡓࢪ࢙ࢡࢱࡘ࠸࡚㸪ࡑࢀࡒࢀࡢ᭱㛗ࡉࢆ⣼ ✚ಶᩘศᕸ࡛♧ࡋࡓᅗࢆᅗ㸱♧ࡍ㸬๓᪉ࡢࢪ࢙ࢡࢱ ࡣ㸪⾪✺㏿ᗘࡀቑຍࡍࡿᚑࡗ࡚㸪᭱ࡢࢪ࢙ࢡࢱ㛗ࡉ ࡣ㛗ࡃ࡞ࡾ㸪ࡑࢀࡒࢀࡢ⣼✚ಶᩘࡶቑຍࡋ࡚࠸ࡗࡓ㸬ࡑࢀ ᑐࡋ㸪ᚋ᪉ࡢࢪ࢙ࢡࢱ࡛ࡣഴྥࡀ␗࡞ࡗࡓ㸬┤ᚄ1.6 mmࡢ㣕⩧యᑐࡋ࡚㸪┤ᚄ3.2 mmࡢ㣕⩧య࡛ࡣ⣼✚ಶᩘ ࡀከࡃ࡞ࡗࡓࡀ㸪ࡑࢀࡼࡾࡁ࡞┤ᚄ5 mm, 7 mm࡛ࡣ㸪㣕 ⩧యࡢ┤ᚄࡀࡁࡃ࡞ࡗ࡚ࡶࢪ࢙ࢡࢱࡢ᭱㛗ࡉ࠾ࡼࡧ ⣼✚ಶᩘࡣࡰྠࡌ࡛㸪┤ᚄ3.2 mm㸪5 mm, 7 mmࡢศᕸࡣ㸪 ࡰ୍ࡘࡢ᭤⥺ࡢࡼ࠺ࡳ࠼ࡿ㸬 ᚋࡣ㸪ࡇࡢせᅉࢆ᥈ࡿࡓࡵ㸪⾪✺ᚋࡢࢱ࣮ࢤࢵࢺࢆヲ ࡋࡃㄪࡿᚲせࡀ࠶ࡿ㸬 250 I7.0 mm I5.0 mm I3.2 mm I1.6 mm 200 N(a) ཧ⪃ᩥ⊩ 1) ຍ⸨᫂㸪ୡ⏺ࡢࢹࣈࣜᑐ⟇ࡢ㐍ᒎ≧ἣ㸪Spaceguard Research Vo.3㸪pp.78-83(2011). 2) ᳃㔜ṇ㸪▮㔝㸪ᮌ㒊ໃ⮳ᮁ㸪M.J. Neish㸪S.P. Deshpande㸪๓ᕝḠஅ㸪SFU⾨ᫍୖࡢ㉸㧗㏿⾪✺ࡢ୕ ḟඖᙧ≧ศᯒ㸪᪥ᮏᝨᫍ⛉Ꮫ⛅Ꮨㅮ₇ண✏㞟㸪 pp.44(1997). 3) ᕝྐᮁ㸪Ᏹᐂᶵタィᶆ‽ ࢹࣈࣜ㜵ㆤタィWG࠾ࡅ ࡿ⾪✺ᐇ㦂㸪Ᏹᐂ⎔ቃࢩ࣏ࣥࢪ࣒࢘ㅮ₇ㄽᩥ㞟㸪 pp.131-134 (2007). 4) ᕝྐᮁ㸪ோ⏣ᕤ⨾㸪℩ୖ๛㸪Ⱁศᏹᫀ㸪㧗ᶫ┿ே㸪ኴ 㝧㟁ụࣃࢿࣝࡢࢹࣈࣜ⾪✺ࡼࡿ㟁Ẽⓗᙳ㡪㸪ࢫ࣮࣌ ࢫࣉࣛࢬ࣐◊✲㸪pp.120-123 (2006). 5) ⣮యᕤᏛࡢᇶ♏⦅㞟ጤဨ, ⣮యᕤᏛࡢᇶ♏, pp.31-35 (1992). 150 100 50 0 0 10 20 30 40 a [mm] 50 60 (a) ๓᪉ࡢࢪ࢙ࢡࢱ 250 I7.0 mm I5.0 mm I3.2 mm I1.6 mm N(a) 200 150 100 50 0 0 10 20 30 40 50 a [mm] 60 70 80 (b) ᚋ᪉ࡢࢪ࢙ࢡࢱ ᅗ㸱 ࢪ࢙ࢡࢱ㛗ࡉࡢ⣼✚ಶᩘศᕸ㸦┤ᚄ1.6 mmࡣ3.47 km/s㸪┤ᚄ3.2 mmࡣ3.55 km/s㸪┤ᚄ5.0 mmࡣ3.44 km/s㸪┤ ᚄ7.0 mmࡣ3.64 km/s㸧 － 74 －
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