JAXA ♫఍㐃ᦠㅮᗙ䝅䞁䝫䝆䜴䝮

1

ᮦᩱࡢ㧗ࡦࡎࡳ㏿ᗘୗ࡛ࡢ ᛂຊ̽ࡦࡎࡳᣲື

ᑠᯘ ⚽ᩄ

኱㜰኱Ꮫ ᇶ♏ᕤᏛ◊✲⛉ ᶵ⬟๰ᡂᑓᨷ

JAXA ♫఍㐃ᦠㅮᗙ䝅䞁䝫䝆䜴䝮

ᵓ㐀ᮦᩱ䛻㛵䜟䜛Ᏻ඲タィ䛾㧗ᗘ໬

䡚Ᏹᐂ⯟✵ศ㔝䛛䜙௚ศ㔝䜈䛾᪂䛯䛺ᒎ㛤䡚

(2015.041.21)ᮾ኱ᒣୖ఍㤋

ࢦ࣒࣓ࢱࣝࡢ⾪ᧁᅽ⦰ኚᙧ

ⓎἻ࢔࣑ࣝࢽ࣒࢘ࡢ⾪ᧁᅽ⦰ኚᙧ

✚ᒙ࣮ࣞࢨ࣮↝⤖ᮦࡢ⾪ᧁᘬᙇኚᙧᙉᗘ

࠸ࢁ࠸ࢁ࡞㏿ᗘ࡜ᐇ㦂⿦⨨

2

‽㟼ⓗ

a

V

ື ⓗ

a

V

⾪ ᧁ

㻝㻜^㻞

V

a

ᮾி኱Ꮫ䚷䝻䜿䝑䝖䞉Ᏹᐂᶵ䝰䝕䝸䞁䜾䝷䝪䝷䝖䝸䞊䠄♫఍㐃ᦠㅮᗙ䠅䝅䞁䝫䝆䜴䝮 䛂ᵓ㐀ᮦᩱ䛻㛵䜟䜛Ᏻ඲タィ䛾㧗ᗘ໬䡚Ᏹᐂ⯟✵ศ㔝䛛䜙௚ศ㔝䜈䛾᪂䛯䛺ᒎ㛤䡚䛃

㻡㻝

3

ࢦ࣒࣓ࢱࣝࢦ࣒࣓ࢱࣝࡢ⾪ᧁᅽ⦰ኚᙧ≉ᛶ

%&&ᵓ㐀ࠊșᆺࢳࢱࣥྜ㔠 పᙎᛶ⋡㸦( ࠥ*3D㸧 ᙎᛶ㝈⏺㸦Ȝ 㸧 㧗ᙉᗘ㸦Ȫ!03D㸧

㉸ረᛶ㸦௨ୖ෭㛫ຍᕤ㸧

௨ୖࡢ෭㛫ຍᕤᮦ

࢚ࣜࣥࣂ࣮≉ᛶ

㸦(ࡢ ᗘኚ໬ࡀ࡞࠸㸧

࢖ࣥࣂ࣮≉ᛶ

㸦⥺⭾ᙇಀᩘࡀ㠀ᖖ࡟ᑠࡉ࠸㸧

䠄ᰴ䠅㇏⏣୰ኸ◊✲ᡤ䛷㛤Ⓨ

1998ᖺ䚸᪂ྜ㔠Ⓨぢ䚸 2000ᖺ䚸〇ရ໬

㌿఩䛻䜘䜛䛩䜉䜚ኚᙧ䛷䛿䛺䛔

ᚤ⣽䛺᩿ᒙ䠄1µm⛬ᗘ䠅䛜㐃

⥆ⓗ䛻Ⓨ⏕

7L1E7D=U2

⤌ ᡂ DWO 7L1E7D=U2 7L7D1E9=U2

ࢦ࣒࣓ࢱࣝࡢ㐺⏝

⦆䜏䛾ᑡ䛺䛔䝛䝆

ᙎᛶ䛻ᐩ䜐䝯䜺䝛䝣䝺䞊䝮

ࡑࡢ௚ࡢᛶ㉁

࣭ࡋ࡞ࡸ࠿

࣭᭷ᐖ≀㉁ࢆྵࡲ࡞࠸

࣭ຍᕤᛶࡀࡼ࠸

⯟✵࣭Ᏹᐂ㒊ရࠊ⮬ື㌴㒊ရࠊ⢭ᐦᶵჾࠊ

་⒪ᶵჾࠊ⏕యᮦᩱ࡞࡝࡬

࠙┠ ⓗࠚ ᪂ᮦᩱ࡛࠶ࡿࢦ࣒࣓ࢱࣝࡢࠊ ᅽ⦰ኚᙧ࡟࠾ࡅࡿࡦࡎࡳ㏿ᗘ౫Ꮡᛶࠊ ᙉᗘࡢ ᗘ౫Ꮡᛶ ࢆ᫂ࡽ࠿࡟ࡍࡿࡇ࡜ࠋ

Ᏹᐂ⯟✵◊✲㛤Ⓨᶵᵓ≉ู㈨ᩱ䚷㻶㻭㼄㻭㻙㻿㻼㻙㻝㻡㻙㻜㻜㻣 㻡㻞

5

ヨ㦂∦䛸⾪ᧁヨ㦂⿦⨨

⁐య໬ฎ⌮

^{‽㟼ⓗᅽ⦰ヨ㦂}

™

V

⾪ᧁᅽ⦰ヨ㦂

㻝㻞㻜㻜㻌㼪㻌㻝㻠㻜㻜㻌V

ȭࡢ୸Წ࠿ࡽࠊ

㧗ࡉ PPࡢ෇ᰕヨ㦂∦

7L1E7D=U2

6

ヨ㦂 ᗘ

ప ヨ㦂 ෭፹ᵴࢆ౑⏝

7 .ᾮయ❅⣲

7 .

࢚ࢱࣀ࣮ࣝ㸩ࢻࣛ࢖࢔࢖ࢫ

㧗 ヨ㦂

7 ..

㸦‽㟼ⓗ㸧

㉥እ⥺⅔ࢆ౑⏝

㸦⾪ᧁ㸧

⮬సࡢ㟁Ẽ⅔

' PP / PP

ᮾி኱Ꮫ䚷䝻䜿䝑䝖䞉Ᏹᐂᶵ䝰䝕䝸䞁䜾䝷䝪䝷䝖䝸䞊䠄♫఍㐃ᦠㅮᗙ䠅䝅䞁䝫䝆䜴䝮 䛂ᵓ㐀ᮦᩱ䛻㛵䜟䜛Ᏻ඲タィ䛾㧗ᗘ໬䡚Ᏹᐂ⯟✵ศ㔝䛛䜙௚ศ㔝䜈䛾᪂䛯䛺ᒎ㛤䡚䛃

㻡㻟

7

㟼ⓗᅽ⦰ヨ㦂⤖ᯝ

ᐊ ࡟࠾ࡅࡿ㝆అᛂຊࡣࠊ 03D⛬ᗘ

㸦7L$O9࡜ྠ⛬ᗘ㸧 ᙉᗘࡢୖ᪼ࡣప ࡯࡝

㢧ⴭ

㧗 ࡯࡝ࠊຍᕤ◳໬ࡀ ᑠࡉ࠸

FIᙉຍᕤࡋࡓࢦ࣒࣓ࢱ

ࣝࡣ࡯࡜ࢇ࡝ຍᕤ◳໬ࡋ

࡞࠸

┿ᛂຊѸ┿ࡦࡎࡳ᭤⥺

 ᐃἼᙧ

ᡴᧁᲬ㸸/ PP ᛂຊἼࡢ㏿ᗘ F PV

ධᑕἼࡢᣢ⥆᫬㛫 ࡣࠊwV

Ᏹᐂ⯟✵◊✲㛤Ⓨᶵᵓ≉ู㈨ᩱ䚷㻶㻭㼄㻭㻙㻿㻼㻙㻝㻡㻙㻜㻜㻣 㻡㻠

9

ヨ㦂∦୧➃䛾ᛂຊ

ྑ➃䠖ධᑕἼ䠇཯ᑕἼ ᕥ➃䠖㏱㐣Ἴ

H ˙ ² U Cl

0

V

_i

V

_t

H ² U Cl

0

V

_i

V

_t

dt

³ V ^A

A

0

V

_t

㔮ྜ䛳䛶䛔䜛

10

䜂䛪䜏㏿ᗘ䛸බ⛠ᛂຊ

ᐊ 㸸

Ȝ ⛬ᗘࡲ࡛ࡣ ࡦࡎࡳ㏿ᗘࡣࠊV

࡛࡯ࡰ୍ᐃࠊᚋ༙పୗ

7

.㸸

ࡦࡎࡳ㏿ᗘࡣࠊ඲ᇦ࡛ᴫ ࡡ୍ᐃࠊ V

7 .㸸

ᅽቯࡋࡓࡓࡵࠊኚᙧ㔞ࡀ ᴟࡵ࡚ᑠࡉ࠸

ࡦࡎࡳ㏿ᗘࡣࠊ඲ᇦ࡛኱

ࡁࡃኚື

V

H

ᮾி኱Ꮫ䚷䝻䜿䝑䝖䞉Ᏹᐂᶵ䝰䝕䝸䞁䜾䝷䝪䝷䝖䝸䞊䠄♫఍㐃ᦠㅮᗙ䠅䝅䞁䝫䝆䜴䝮 䛂ᵓ㐀ᮦᩱ䛻㛵䜟䜛Ᏻ඲タィ䛾㧗ᗘ໬䡚Ᏹᐂ⯟✵ศ㔝䛛䜙௚ศ㔝䜈䛾᪂䛯䛺ᒎ㛤䡚䛃

㻡㻡

11

⾪ᧁᘬᙇヨ㦂⤖ᯝ

7

.௨እ㸸

㝆అᛂຊࡣࠊ㟼ⓗヨ㦂⤖

ᯝࡼࡾⴭࡋࡃୖ᪼

ࡦࡎࡳ㏿ᗘ౫Ꮡᛶ

඲࡚ࡢ ᗘᇦ㸸 ຍᕤ㌾໬

FI㟼ⓗ࡛ࡣࠊຍᕤ◳໬

7

.

7

.㸸

ᅽቯࡋࡓ

FI㟼ⓗ࡛ࡣࠊᅽቯࡏࡎ

┿ᛂຊѸ┿ࡦࡎࡳ᭤⥺

V V

₀

1 H

₀

H ^{ln 1} H

₀

⾪ᧁᘬᙇヨ㦂⤖ᯝ

7

.௨እ㸸

㝆అᛂຊࡣࠊ㟼ⓗヨ㦂⤖

ᯝࡼࡾⴭࡋࡃୖ᪼

ࡦࡎࡳ㏿ᗘ౫Ꮡᛶ

඲࡚ࡢ ᗘᇦ㸸 ຍᕤ㌾໬

FI㟼ⓗ࡛ࡣࠊຍᕤ◳໬

7

.

7

.㸸

ᅽቯࡋࡓ

FI㟼ⓗ࡛ࡣࠊᅽቯࡏࡎ

┿ᛂຊѸ┿ࡦࡎࡳ᭤⥺

ヨ㦂๓ 7 . 7 .

Ᏹᐂ⯟✵◊✲㛤Ⓨᶵᵓ≉ู㈨ᩱ䚷㻶㻭㼄㻭㻙㻿㻼㻙㻝㻡㻙㻜㻜㻣 㻡㻢

13

ຍᕤ◳໬䠃㌾໬

‽㟼ⓗ㸸

6 !

඲࡚ࡢ ᗘᇦ࡛ຍᕤ◳໬

ᐊ ௨ୖ࡛ࡣࠊ

6 ῶᑡ

⾪ᧁ㸸

6

ຍᕤ㌾໬ࠊప ࡯࡝㢧ⴭ

QE.࡛ࡣࠊ

࡯࡜ࢇ࡝ኚᙧࡏࡎᅽቯ

⾪ᧁࡢࡳ㌾໬ࠊప࠸⇕ఏ ᑟ⋡㸦7L:P.

1E:P.㸧FI

$O:P.

Ў

᩿⇕ⓗ ᗘୖ᪼࠿㸽 ຍᕤ◳໬ࣃ࣓ࣛࢱ࣮

Ȝ 㸸

6 ǼȪǼȜ

14

ᛂຊ䛾 ᗘ౫Ꮡᛶ ^{Ȝ ࡛ࡢȪ}

7

.

‽㟼ⓗ㸸඲࡚ࡢ ᗘᇦ

⾪ ᧁ㸸.௨እࡢ  ᗘᇦ ᴫࡡ

Ȫ ҃ Ҁ

7 7

ᛂຊࡣ ᗘࡢ࣮ࣝࢺ࡟

཯ẚ౛ࡋ࡚ῶᑡ

7

㼪 .

┤⥺㏆ఝࠊഴࡁǼȪ₇ ǼȪ₇ 03D.

FI7L03D.

7L$O6Q㸸 7L$O9 7L0R=U

ᮾி኱Ꮫ䚷䝻䜿䝑䝖䞉Ᏹᐂᶵ䝰䝕䝸䞁䜾䝷䝪䝷䝖䝸䞊䠄♫఍㐃ᦠㅮᗙ䠅䝅䞁䝫䝆䜴䝮 䛂ᵓ㐀ᮦᩱ䛻㛵䜟䜛Ᏻ඲タィ䛾㧗ᗘ໬䡚Ᏹᐂ⯟✵ศ㔝䛛䜙௚ศ㔝䜈䛾᪂䛯䛺ᒎ㛤䡚䛃

㻡㻣

15

᩿⇕ⓗ ᗘୖ᪼

' T E

U _c ³ V _d H

Ǽ 7 㸸᩿⇕ⓗ ᗘୖ᪼

ș㸸ረᛶ௙஦ࡀ⇕࡟ኚ᥮ࡉࢀࡿ๭ྜࠊș Ȩ㸸㉁㔞ᐦᗘ Ȩ NJP

ᐇ ್ F 㸸⣧ࢳࢱࣥࡢ.࡜.ࡢẚ⇕ࡢᖹᆒ್

㸦 F -.NJ㸧

⾪ᧁヨ㦂⤖ᯝ䛿䚸᩿⇕ⓗ ᗘୖ᪼䛻䜘䜛ᛂຊపୗ䜢⏕䛨䛯⤖ᯝ

⾪ᧁኚᙧ䛻䛚䛡䜛➼ ኚᙧ

㸦⾪ᧁヨ㦂⤖ᯝ㸧㸻㸦➼ ⾪ᧁኚᙧ㸧࣮㸦᩿⇕ⓗ ᗘୖ᪼ศ㸧

‽㟼ⓗヨ㦂⤖ᯝ䛿➼ ኚᙧ

⣧⢋䛺䜂䛪䜏㏿ᗘຠᯝ

➼ ኚᙧ᫬䛾ረᛶ௙஦䛛䜙᩿⇕ⓗ ᗘୖ᪼䜢ồ䜑䛺䛡䜜䜀䛺䜙䛺䛔䚹

⾪ᧁ➼ ኚᙧ

⾪ᧁኚᙧ࡛ࡶࠊ௬᝿ⓗ

࡞➼ ⾪ᧁኚᙧࢆ⪃࠼

ࡿ࡜㟼ⓗ⤖ᯝྠᵝࠊຍ ᕤ◳໬ࡍࡿࠋ

7 .࡛ࠊ ࡦࡎࡳ㏿ᗘ౫Ꮡᛶࡣ 03D⛬ᗘࡢᛂຊቑ ຍ

7 .ࡢࢹ࣮ࢱ

᩿⇕ⓗ ᗘୖ᪼Ǽ7 Ȝ ࡛ࠊ⣙.

┿ᛂຊѸ┿ࡦࡎࡳ᭤⥺

Ᏹᐂ⯟✵◊✲㛤Ⓨᶵᵓ≉ู㈨ᩱ䚷㻶㻭㼄㻭㻙㻿㻼㻙㻝㻡㻙㻜㻜㻣 㻡㻤

17

T = 201, 473 K 䛷䛾➼ ⾪ᧁኚᙧ

㻞㻜㻜㻜

㻝㻡㻜㻜

㻝㻜㻜㻜

㻡㻜㻜

㻜 㻿㼠㼞㼑㼟㼟㻘㻌㻌㻌

V

㻌㻌㻌㼛㼞㻌㻌

V

㻌㻌㻌㻔㻹㻼㼍㻕㻌

㻜㻚㻡 㻜㻚㻠

㻜㻚㻟 㻜㻚㻞

㻜㻚㻝 㻜㻚㻜

㼀㼞㼡 㼑㻌㼟㼠㼞㼍㼕 㼚 㻘㻌㻌㻌

H

T

㻩㻌㻞㻜㻝㻌㻷

T

㻩㻌㻠㻣㻟㻌㻷

㻌㻰 㼥㼚 㼍㼙 㼕㼏㻌㼐㼍㼠㼍 㻌㻵 㼟㼛㻙㼠㼔 㼑㼞㼙 㼍㼘 㻌㻵 㼙 㼜㼍㼏㼠 㻌㻿㼠㼍㼠㼕㼏㻌㼐㼍㼠㼍

18

䜎 䛸 䜑

ࢦ࣒࣓ࢱࣝࡢ㸪ᗈ⠊࡞ ᗘᇦ㸦

7

.㼪 .㸧࡛ࡢ‽㟼ⓗ࠾ࡼ

ࡧ⾪ᧁᅽ⦰ヨ㦂࠿ࡽᚓࡽࢀࡓ୺࡞⤖ᯝࡣ௨ୗࡢ࡜࠾ࡾ࡛࠶ࡿ㸬 ‽㟼ⓗヨ㦂࡛ࡣ㸪࠸ࡎࢀࡢ ᗘ࡟࠾࠸࡚ࡶຍᕤ◳໬ࢆ♧ࡋ㸪ᐊ  ௨ୖ࡛ࡣヨ㦂 ᗘࡢୖ᪼࡟࡜ࡶ࡞࠸㸪ຍᕤ◳໬⋡ࡣῶᑡࡍࡿ㸬 ⾪ᧁᅽ⦰ヨ㦂࡟࠾࠸࡚ࡣ㸪࠸ࡎࢀࡢ ᗘ࡟࠾࠸࡚ࡶຍᕤ㌾໬ࢆ

♧ࡋ㸪ࡑࡢ㌾໬⋡ࡣప ࡯࡝㢧ⴭ࡛࠶ࡿ㸬

7

.ࡢప ᇦࢆ㝖࠸࡚㸪ረᛶኚᙧึᮇࡢᛂຊࡣࡦࡎࡳ㏿ᗘ౫ Ꮡᛶࢆ♧ࡋ㸪⾪ᧁヨ㦂࡟࠾ࡅࡿᛂຊࡣ㟼ⓗヨ㦂⤖ᯝࡢࡑࢀࡼࡾ኱ࡁ ࡃ࡞ࡿ㸬

┿ ࡦࡎࡳ㸳㸣࡛ࡢࢦ࣒࣓ࢱࣝࡢ┿ᛂຊࡢ ᗘ౫Ꮡᛶࡣ㸪

7

Ӌ . ࡟࠾࠸࡚ࡣ㸪‽㟼ⓗ࠾ࡼࡧ⾪ᧁヨ㦂࠸ࡎࢀ࡟࠾࠸࡚ࡶ㸪ᴫࡡ Ҁ7 ࡟཯ẚ౛ࡋ࡚ ᗘࡢୖ᪼࡜࡜ࡶ࡟పୗࡍࡿ

ᐊ ࡟࠾ࡅࡿ⾪ᧁヨ㦂⤖ᯝ࡜᩿⇕ⓗ࡞ ᗘୖ᪼࡜ᛂຊࡢ ᗘ౫ Ꮡᛶࢆᇶ࡟ồࡵࡓ௬᝿ⓗ࡞➼ ኚᙧᛂຊࡣ㸪㟼ⓗヨ㦂⤖ᯝ࡜ྠᵝ࡟

ຍᕤ◳໬ࢆ♧ࡍ㸬

◊✲ຓᡂ㸸ࢫࢬ࢟㈈ᅋ㸦ࢫࢬ࢟ᮦ࣮ຓ ➨࢖㸶ྕ㸧 ࢦ࣒࣓ࢱࣝࡢᥦ౪㸸಴ᮏ ⦾ Ặ㸦㇏⏣୰ኸ◊✲ᡤ㸧

ᮾி኱Ꮫ䚷䝻䜿䝑䝖䞉Ᏹᐂᶵ䝰䝕䝸䞁䜾䝷䝪䝷䝖䝸䞊䠄♫఍㐃ᦠㅮᗙ䠅䝅䞁䝫䝆䜴䝮 䛂ᵓ㐀ᮦᩱ䛻㛵䜟䜛Ᏻ඲タィ䛾㧗ᗘ໬䡚Ᏹᐂ⯟✵ศ㔝䛛䜙௚ศ㔝䜈䛾᪂䛯䛺ᒎ㛤䡚䛃

㻡㻥

ⓎἻ࢔࣑ࣝࢽ࣒࢘ࡢ⾪ᧁᅽ⦰ኚᙧ

19

⾪ᧁⲴ㔜ࡢ ᐃ

ᶓ⨨ࡁࡢᅽ⦰ᆺ࣍ࣉ࢟ࣥࢯࣥᲬ

⦪⨨ࡁࡢᘬᙇᆺ

࣍ࣉ࢟ࣥࢯࣥᲬ

฼Ⅼ䠖ヨ㦂∦୧➃㠃䛾Ⲵ㔜䛜㔮ྜ䛳䛶䛔䜛䛣䛸䛜

☜ㄆ䛷䛝䚸 ᐃ⢭ᗘ䛜Ⰻ䛔 ḞⅬ䠖 ᐃ᫬㛫䛻ไ㝈䛜䛒䜛

㛗᫬㛫࣍ࣉ࢟ࣥࢯࣥᲬἲ

㔠ᒓ〇ᛂຊᲬ

ĺ

䝫䝸䝬䞊〇ᛂຊᲬ

c E

U

F (

Ȩ

NPV *3D NJP

0LOGVWHHO

$ODOOR\

1\ORQ

39&BKDUG

䠍䠊⦪ᙎᛶἼ㏿ᗘ䛾㐜䛔≀㉁䛾᥇⏝

PࡢᡴᧁᲬ

c = 5,000 m/s ĺ 400 µs c = 2,000 m/s ĺ 1000 µs

䠎䠊⧞㏉䛧ᛂຊἼ䛾฼⏝

Hamada T. & kanahashi H. (2005), Dynamic strength in uniaxial compression of closed cell aluminum foam, Porous met. and met. forming techgy., pp.533-538

Zhao H. (1997), Polymer Testing, vol.

16, pp.507-616

Testing of Polymeric foams at high and medium strain rates.

䠎䝀䞊䝆ἲ䜢౑䛳䛶䚸

ᛂຊἼ䜢ศ㞳 䠇 㔜䛽ྜ䜟䛫

Ᏹᐂ⯟✵◊✲㛤Ⓨᶵᵓ≉ู㈨ᩱ䚷㻶㻭㼄㻭㻙㻿㻼㻙㻝㻡㻙㻜㻜㻣 㻢㻜

ᛂຊᲬ௨እࡢ⾪ᧁⲴ㔜ࡢ ᐃ

21

Tanimura S., A new method for measuring impulsive force at contact parts,

Exper. Mech., 24 (1984), 271-276.

Daimaruya M., et al., A sensing-plate method for measuring force and duration of impact in elastic- plastic impact of bodies, Exper. Mech., 29 (1989), 268-273.

Daimaruya M. & Kobayashi H., Impact force and elastic response of tapered bars in collision with rigid wall, Proc. Fracture and Strength, Seoal, (1990), 418-423.

㇂ᮧ┿἞ ௚ࠊ᳨᳨ຊࣈࣟࢵࢡᘧヨ㦂ἲ࡟ࡼࡿືⲴ㔜᳨ฟࡢ㐺⏝⠊ᅖࠊᶵㄽ$⦅ࠊ㸦㸧.

᳨ຊ෇ᯈ㸤෇ᰕ

᳨ຊࣈࣟࢵࢡ

᳨▱㒊௜ࡁ ᛂຊᲬ

ⓎἻ࢔࣑ࣝࢽ࣒࢘

22 5 mm

$/325$6⚄㗰㗰⥺ᰴ

ᐦᗘ㸸

²

NJP㸪 ᖹᆒࢭࣝࢧ࢖ࢬ㸸PP

50

40

30

20

10

Frequency (%)

8 6 4 2 0

Cell size (mm)

l

h

l

┤᪉యヨ㦂∦㸸

h = 15mm

୍ᐃ

l = 15 , 20 , 30 mm

❧᪉యヨ㦂∦㸸

l = h = 15 , 20 , 30 , 50 mm

‽㟼ⓗᅽ⦰ヨ㦂 ࡦࡎࡳ㏿ᗘ㸸™V 䝉䝹䝃䜲䝈䛸

ヨ㦂∦䝃䜲䝈

ᮾி኱Ꮫ䚷䝻䜿䝑䝖䞉Ᏹᐂᶵ䝰䝕䝸䞁䜾䝷䝪䝷䝖䝸䞊䠄♫఍㐃ᦠㅮᗙ䠅䝅䞁䝫䝆䜴䝮 䛂ᵓ㐀ᮦᩱ䛻㛵䜟䜛Ᏻ඲タィ䛾㧗ᗘ໬䡚Ᏹᐂ⯟✵ศ㔝䛛䜙௚ศ㔝䜈䛾᪂䛯䛺ᒎ㛤䡚䛃

㻢㻝

ᛂຊ࣮ࡦࡎࡳ᭤⥺

23

6

4

2

Stress , V (MPa)

0.8 0.6

0.4 0.2

0.0

Strain , H

l = 15mm, 244 kg/m

³

l = 20mm, 245 kg/m

³

l = 30mm, 245 kg/m

³

l = 50mm, 243 kg/m

³

V

_pl

H = 0.1 ~ 0.4

V

₀₆

ࣉࣛࢺ࣮ᛂຊ㸸

´

pl

¦

a࡛ࡢȪࡢᖹᆒ್

⦓ᐦ໬㛤ጞᛂຊ㸸

´

06

¦

࡛ࡢȪࡢ್

❧᪉యヨ㦂∦䛾ᛂຊ䞊䜂䛪䜏᭤⥺

ヨ㦂∦䝃䜲䝈䛾ᙳ㡪

ࣉࣛࢺ࣮ᛂຊ࡜⦓ᐦ໬㛤ጞᛂຊ

ヨ㦂∦ࡢయ✚ࡣࠊ9ӋPP ᅽ⦰㠃✚ࡣࠊ9ӋPP

Ᏹᐂ⯟✵◊✲㛤Ⓨᶵᵓ≉ู㈨ᩱ䚷㻶㻭㼄㻭㻙㻿㻼㻙㻝㻡㻙㻜㻜㻣 㻢㻞

25

ⓎἻ࢔࣑ࣝࢽ࣒࢘ࡢᶵᲔⓗ≉ᛶ

ヨ㦂∦

unit:mm

‽㟼ⓗヨ㦂

⾪ᧁヨ㦂

࣮࢜ࢺࢢࣛࣇ

ᡴᧁᘧ⾪ᧁヨ㦂 ⴠ㗽ヨ㦂

[ V [ V

[ V [ V ヨ㦂᪉ἲ ึᮇࡦࡎࡳ㏿ᗘ

ⴠ㗽ヨ㦂

⣙NJࡢ㗽ࢆヨ㦂∦ࡢ

ୖ➃㠃࠿ࡽ PPࡢ఩⨨

࠿ࡽ⮬⏤ⴠୗ

ᡴᧁᘧ⾪ᧁヨ㦂 ኚ఩ࡣࠊ㧗㏿ᗘ࣓࢝ࣛࡢ

ᫎീ࠿ࡽ ᐃࡍࡿ

ISV

26

⾪ᧁヨ㦂୰ࡢኚ఩

(1) G

1

V

0

t (2) G

₂

V

0

t 1

m ³³ Pdtdt

(3) ¥

3

㧗㏿ᗘࣅࢹ࣓࢜࢝ࣛ

ࡢ⏬ീ࠿ࡽ

Comparison of three displacements measured during a dynamic test

ヨ㦂∦ࡢ྾཰࢚ࢿࣝࢠ࣮ࢆ

⪃៖ࡋ࡚⿵ṇ

P : Ⲵ㔜 , m : ࢫࢺࣛ࢖࣮࢝ࡢ㉁㔞 V

₀

= 17.0 m/s

¥

1 㐣኱ホ౯

¥

2 䛿䚸ᴫ䛽

¥

3䛻➼䛧䛔

¥

2䜢ヨ㦂∦䛾ኚ఩䛸䛧䛶᥇⏝

Reliability of load cell

͐͐㏿ᗘ୍ᐃ

ᮾி኱Ꮫ䚷䝻䜿䝑䝖䞉Ᏹᐂᶵ䝰䝕䝸䞁䜾䝷䝪䝷䝖䝸䞊䠄♫఍㐃ᦠㅮᗙ䠅䝅䞁䝫䝆䜴䝮

䛂ᵓ㐀ᮦᩱ䛻㛵䜟䜛Ᏻ඲タィ䛾㧗ᗘ໬䡚Ᏹᐂ⯟✵ศ㔝䛛䜙௚ศ㔝䜈䛾᪂䛯䛺ᒎ㛤䡚䛃

㻢㻟

ᐦᗘ࡟ࡼࡿ⿵ṇ

27

ヨ㦂㏿ᗘ㸦aPV㸧

ȡ

aNJP

ı

pt䠖 䝥䝷䝖䞊ᛂຊ

䠄İ

= 0.1

䡚

0.4

䛻䛚䛡䜛ᖹᆒᛂຊ 䠅

ᛂຊẚı*

(= ı

_pt2

/ ı

_pt1

)

ᐦᗘẚȡ*

(= ȡ

2

/ ȡ

1

)

ı * = ȡ * ^1.40

ᐦᗘ࡟ࡼࡿ⿵ṇ

ヨ㦂㏿ᗘ㸦aPV㸧

ȡ

aNJP

ı

pt䠖 䝥䝷䝖䞊ᛂຊ

䠄İ

= 0.1

䡚

0.4

䛻䛚䛡䜛ᖹᆒᛂຊ 䠅

ᛂຊẚı*

(= ı

_pt2

/ ı

_pt1

)

ᐦᗘẚȡ*

(= ȡ

2

/ ȡ

1

) ı* =ȡ* ^1.40

² ^{= 270 kg/m}

³䛻᥮⟬

Ᏹᐂ⯟✵◊✲㛤Ⓨᶵᵓ≉ู㈨ᩱ䚷㻶㻭㼄㻭㻙㻿㻼㻙㻝㻡㻙㻜㻜㻣 㻢㻠

29

ⓎἻ࢔࣑ࣝࡢࡦࡎࡳ㏿ᗘ౫Ꮡᛶ

ࡦࡎࡳ㏿ᗘࡢୖ᪼࡟క࠸ᏳᐃⲴ㔜ࡀቑຍࡋኚᙧᚋᮇࡢ⦓ᐦ໬ࡀಁ㐍 ᛂຊѸࡦࡎࡳ᭤⥺ ᛂຊ࡜ࡦࡎࡳ㏿ᗘࡢ㛵ಀ

䜂䛪䜏㏿ᗘ10²䡚10³䛷ᛂຊ䛾ቑຍ䛜ぢ䜙䜜䚸㧗䜂䛪䜏ᇦ䜋䛹䛭䛾ᙳ㡪䛜኱䛝䛔

D H

H

₀

§

©¨

·

¹¸

m

࢔࣏ࣝࣛࢫࡢ㏿ᗘ౫Ꮡᵓᡂᘧ

30

V D

1000 _ª¬ 1700 10 D ^{exp 8.6} H _º¼ ^, D H 0.002

§

©¨

·

¹¸

0.018

H | 0.001 ~ 300 s

^-1

V D

1000 _ª¬ 1700 10 D ^{exp 8.6} H _º¼ ^, D ^1.24 H 300

§

©¨

·

¹¸

0.113

H | 300 ~ 2000 s

^-1

ᮾி኱Ꮫ䚷䝻䜿䝑䝖䞉Ᏹᐂᶵ䝰䝕䝸䞁䜾䝷䝪䝷䝖䝸䞊䠄♫఍㐃ᦠㅮᗙ䠅䝅䞁䝫䝆䜴䝮 䛂ᵓ㐀ᮦᩱ䛻㛵䜟䜛Ᏻ඲タィ䛾㧗ᗘ໬䡚Ᏹᐂ⯟✵ศ㔝䛛䜙௚ศ㔝䜈䛾᪂䛯䛺ᒎ㛤䡚䛃

㻢㻡

ࡲ ࡜ ࡵ

31

ᮏඹྠ◊✲࡛ࡣࠊⓎἻ࢔࣑ࣝࢽ࣒࢘㸦࢔࣏ࣝࣛࢫτࠊ⚄㗰㗰⥺

〇㸧ࢆ⏝࠸࡚ࠊ‽㟼ⓗᅽ⦰ヨ㦂ࠊⴠ㗽ᘧືⓗヨ㦂ࠊᅽ⦰✵Ẽࢆ

⏝࠸ࡓ⾪ᧁヨ㦂࡟ࡼࡾࠊ aV

ࡢᗈ⠊ᅖ࡞ࡦࡎࡳ

㏿ᗘᇦ࡟࠾ࡅࡿᛂຊѸࡦࡎࡳ᭤⥺ࢆᐇ㦂ⓗ࡟ồࡵࠊࡑࢀࡽ࠿ࡽᶆ

‽ᐦᗘ U NJP

࡟᥮⟬ࡉࢀࡓⓎἻ࢔࣑ࣝࡢᛂຊѸࡦࡎࡳ᭤

⥺ࢆᚓࡓࠋࡇࢀࡽࢆ⏝࠸࡚ࠊࡦࡎࡳ㏿ᗘ౫Ꮡᛶࢆ⪃៖ࡋࡓ࢔ࣝ

࣏ࣛࢫࡢᵓᡂᘧࢆ๰ᡂࡋࡓࠋࡇࡢᵓᡂ๎ࡣ㠀ᖖ࡟ࢩࣥࣉࣝ࡞ᙧ ᘧ࡛ࠊὶືᛂຊȪࡀࠊ㏿ᗘ౫Ꮡࣃ࣓࣮ࣛࢱ࣮Ș࡜ࡦࡎࡳȜ࡜ࡢ 㛵ᩘ࡜ࡋ࡚⾲⌧ࡉࢀ࡚࠾ࡾࠊ)(0ゎᯒ࡟⤌ࡳ㎸ࡳࡸࡍ࠸ᙧᘧ࡜

࡞ࡗ࡚࠸ࡿࠋࡉࡽ࡟ࠊᥦ᱌ࡉࢀࡓᵓᡂ๎ࡣࠊⓎἻ࢔࣑ࣝࡢᐦᗘ ࡀ U NJP

ࡢሙྜ࡟≉ᐃࡉࢀ࡚࠾ࡾࠊࡇࢀ࠿ࡽูࡢᐦᗘࡢ

ⓎἻ࢔࣑ࣝ࡟ࡶᑐᛂ࡛ࡁࡿࡼ࠺ࠊᐦᗘ࡟ࡼࡿ⿵ṇ᪉ἲࡶᥦ♧ࡉ

ࢀ࡚࠸ࡿࠋ

✚ᒙ࣮ࣞࢨ࣮↝⤖3+ࢫࢸࣥࣞࢫ ࡢ␗᪉ᛶ࡜㏿ᗘ౫Ꮡᛶ

T. LeBrun, K. Tanigaki, K. Horikawa, and H. Kobayashi, Strain rate sensitivity and material anisotropy of selective laser melted 17-4 PH stainless steel, Mechanical Engineering Journal, vol.1 (5), pp.1-13, 2014

'ࣉࣜࣥࢱ࣮࡟ࡼ

ࡿ」㞧㒊ရࡢ〇స

〇సἲ⏤᮶ࡢ

␗᪉ᛶ

ᒙ㛫ࡢẼἻࡸ

㝽㛫

ࢫࢸࣥࣞࢫࣃ࢘

ࢲ࣮ࢆ౑ࡗࡓ'ࣉ

ࣜࣥࢱ࣮࡟ࡼࡿヨ 㦂∦ࡢ〇స

‽㟼ⓗ࠾ࡼࡧ⾪

ᧁᘬᙇヨ㦂

ᘬᢤᮦ࡜ࡢẚ㍑࡟

ࡼࡾࠊ㏿ᗘ౫Ꮡᛶࠊ

␗᪉ᛶࡢ᳨ウ

Ᏹᐂ⯟✵◊✲㛤Ⓨᶵᵓ≉ู㈨ᩱ䚷㻶㻭㼄㻭㻙㻿㻼㻙㻝㻡㻙㻜㻜㻣 㻢㻢

౪ ヨ ᮦ

33

35 13 15

40!

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࣍ࣉ࢟ࣥࢯࣥᲬᆺ⾪ᧁᘬᙇヨ㦂⿦⨨

34 Incident!Bar!

Outer!Wall.!Pressure!Vessel!

Teflon!Baffle!&!Support!Bushing!of!Striker!Tube!

Striker!Tube!(1000mm!Length,!OD!38!mm,!ID!30!mm)!

Inner!Wall,!Pressure!Vessel!!

A A

Cross-Section!

A-A

Foil Gage Array!

2 mm Gage Length Foil Gage Array

Bridge Box Amplifier

Oscilloscope

Striker Plate and Yoke Assy.

Valve

7HQVLOH6SHFLPHQ

*DXJHVHFWLRQ㸸ȭPP O PP

ᮾி኱Ꮫ䚷䝻䜿䝑䝖䞉Ᏹᐂᶵ䝰䝕䝸䞁䜾䝷䝪䝷䝖䝸䞊䠄♫఍㐃ᦠㅮᗙ䠅䝅䞁䝫䝆䜴䝮 䛂ᵓ㐀ᮦᩱ䛻㛵䜟䜛Ᏻ඲タィ䛾㧗ᗘ໬䡚Ᏹᐂ⯟✵ศ㔝䛛䜙௚ศ㔝䜈䛾᪂䛯䛺ᒎ㛤䡚䛃

㻢㻣

ධᑕἼ㸤㏱㐣Ἴ

35 D ධᑕἼ㸤㏱㐣Ἴ

Eᛂຊ࡜ࡦࡎࡳ㏿ᗘ

FධᑕἼ㸩཯ᑕἼ࡜㏱㐣Ἴࡢẚ㍑

D

F

E

V

_n

^A

^o

A V

_T

H

_n

²

U Cl ³ V

_I

V

_T

dt

✚ᒙ࣮ࣞࢨ࣮↝⤖ᮦࡢ␗᪉ᛶ

✚ᒙ㠃࡟ᆶ┤࡞᪉ྥ࡜ᖹ⾜࡞᪉ྥ࡛ࠊᙉᗘࡣ࡯ࡰ୍⮴ࡍࡿࡀࠊ

Ᏹᐂ⯟✵◊✲㛤Ⓨᶵᵓ≉ู㈨ᩱ䚷㻶㻭㼄㻭㻙㻿㻼㻙㻝㻡㻙㻜㻜㻣 㻢㻤

ᘬᢤᮦ࡜ࡢẚ㍑

37

ࣆ࣮ࢡ᫬ຠᮦ+ࡶ⁐య໬ฎ⌮ᮦ&RQGLWLRQ$ࡶࠊ

࣮ࣞࢨ࣮↝⤖ᮦ㸦ᖹ⾜ᮦ㸧ࡢᙉᗘࡣࠊᘬᢤᮦ࡟ẚ࡭⛬ᗘ㧗࠸ࡀࠊ ఙࡧࡣࠊᘬᢤᮦࡢaࡋ࠿࡞࠸ࠋ

⾪ᧁヨ㦂㸦ࡦࡎࡳ㏿ᗘV

࡟࠾࠸࡚ࡶࠊྠࡌഴྥࠋ ᛂຊ̽ࡦࡎࡳ᭤⥺ࡢᙧࡣࠊ࡯ࡰྠࡌࠋ

◚㠃ほᐹ

࣮ࣞࢨ࣮↝⤖᫬࡟⏕ࡌࡓḞ㝗

38

(a) (b)

(c) (d)

c

d

ᮾி኱Ꮫ䚷䝻䜿䝑䝖䞉Ᏹᐂᶵ䝰䝕䝸䞁䜾䝷䝪䝷䝖䝸䞊䠄♫఍㐃ᦠㅮᗙ䠅䝅䞁䝫䝆䜴䝮 䛂ᵓ㐀ᮦᩱ䛻㛵䜟䜛Ᏻ඲タィ䛾㧗ᗘ໬䡚Ᏹᐂ⯟✵ศ㔝䛛䜙௚ศ㔝䜈䛾᪂䛯䛺ᒎ㛤䡚䛃

㻢㻥

ࡲ ࡜ ࡵ

ࢫࢸࣥࣞࢫࣃ࢘ࢲ࣮ࢆ౑ࡗ࡚ࠊ✚ᒙ࣮ࣞࢨ࣮↝⤖ἲ࡟ࡼࡾ〇సࡉࢀࡓヨ 㦂∦ࢆ⏝࠸࡚ࠊ‽㟼ⓗ࠾ࡼࡧ⾪ᧁᘬᙇヨ㦂ࢆᐇ᪋ࡋࠊᶵᲔⓗᛶ㉁ࡢ㏿ᗘ ౫Ꮡᛶࡸ␗᪉ᛶࢆࠊᘬᢤᮦ࡜ࡢẚ㍑࡟ࡼࡾࠊᐇ㦂ⓗ᳨ウࢆ⾜ࡗࡓࠋ 㸦㸯㸧✚ᒙ㠃࡟ᖹ⾜࡞᪉ྥ࡜ᆶ┤࡞᪉ྥࡢẚ㍑࡟ࡼࡾࠊᙉᗘࡣ࡝ࡕࡽࡢ ᪉ྥࡶ࡯ࡰ➼ࡋ࠸ࡀࠊఙࡧࡣࠊᖹ⾜࡞᪉ྥࡢ᪉ࡀ኱ࡁ࠸ࠋ

㸦㸰㸧✚ᒙ㠃࡟ᖹ⾜࡞᪉ྥ࡜ᘬᢤᮦ࡛ࡣࠊࣆ࣮ࢡ᫬ຠᮦ+ࡶ⁐య໬

ฎ⌮ᮦ&RQGLWLRQ$ࡶࠊ࣮ࣞࢨ࣮↝⤖ᮦ㸦ᖹ⾜ᮦ㸧ࡢᙉᗘࡣࠊᘬᢤᮦ࡟

ẚ࡭⛬ᗘ㧗࠸ࡀࠊఙࡧࡣࠊᘬᢤᮦࡢaࡋ࠿࡞࠸ࠋࡇࡢഴྥࡣࠊ⾪

ᧁヨ㦂㸦ࡦࡎࡳ㏿ᗘV

࡟࠾࠸࡚ࡶࠊྠࡌࠋ

㸦㸱㸧◚㠃࡟✚ᒙ࣮ࣞࢨ࣮↝⤖᫬࡟ฟ᮶ࡓ࡜ᛮࢃࢀࡿḞ㝗ࡀほᐹࡉࢀࠊ ࡇࢀࡽࡀࠊᘬᢤᮦ࡟ẚ࡭࡚ఙࡧࡀᑠࡉ࠸ཎᅉ࡜⪃࠼ࡽࢀࡿࠋ

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